{"id":2295,"date":"2026-07-19T12:33:38","date_gmt":"2026-07-19T05:33:38","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/"},"modified":"2026-07-19T12:33:38","modified_gmt":"2026-07-19T05:33:38","slug":"han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/","title":{"rendered":"H\u00e0n TIG Inox A\u2011Z: K\u1ef9 thu\u1eadt, v\u1eadt li\u1ec7u b\u00f9 v\u00e0 m\u1eb9o m\u1ed1i h\u00e0n ng\u1ea5u"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2295&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;H\u00e0n TIG Inox A\u2011Z: K\u1ef9 thu\u1eadt, v\u1eadt li\u1ec7u b\u00f9 v\u00e0 m\u1eb9o m\u1ed1i h\u00e0n ng\u1ea5u&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u0110\u00e1nh gi\u00e1<\/span>\n    <\/div>\n    <\/div>\n<div class=\"custom-toc\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Noi_dung_chinh\" >N\u1ed9i dung ch\u00ednh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#TIG_la_gi_va_vi_sao_%E2%80%9Chop_ca%E2%80%9D_voi_inox\" >TIG l\u00e0 g\u00ec v\u00e0 v\u00ec sao \u201ch\u1ee3p c\u1ea1\u201d v\u1edbi inox?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Chuan_bi_dung_ngay_tu_dau\" >Chu\u1ea9n b\u1ecb \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Thiet_bi_dien_cuc_tungsten\" >Thi\u1ebft b\u1ecb &#038; \u0111i\u1ec7n c\u1ef1c tungsten<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Khi_bao_ve_phu_kien\" >Kh\u00ed b\u1ea3o v\u1ec7 &#038; ph\u1ee5 ki\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Lam_sach_chong_nhiem_sat\" >L\u00e0m s\u1ea1ch &#038; ch\u1ed1ng nhi\u1ec5m s\u1eaft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Vat_lieu_bu_chon_dung_ma_cho_dung_mac\" >V\u1eadt li\u1ec7u b\u00f9: ch\u1ecdn \u0111\u00fang m\u00e3 cho \u0111\u00fang m\u00e1c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Cai_dat_tham_khao_theo_chieu_day_inox_DCEN_Argon\" >C\u00e0i \u0111\u1eb7t tham kh\u1ea3o theo chi\u1ec1u d\u00e0y inox (DCEN, Argon)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Ky_thuat_thao_tac_de_co_moi_han_dep_ngau\" >K\u1ef9 thu\u1eadt thao t\u00e1c \u0111\u1ec3 c\u00f3 m\u1ed1i h\u00e0n \u0111\u1eb9p, ng\u1ea5u<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Goc_mo_chieu_dai_ho_quang_cap_day\" >G\u00f3c m\u1ecf, chi\u1ec1u d\u00e0i h\u1ed3 quang, c\u1ea5p d\u00e2y<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Han_tam_mong_%E2%89%A4_2_mm\" >H\u00e0n t\u1ea5m m\u1ecfng (\u2264 2 mm)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Han_ong_%E2%80%93_root_pass_voi_back_purge\" >H\u00e0n \u1ed1ng \u2013 root pass v\u1edbi back purge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Vi_tri_dungtran\" >V\u1ecb tr\u00ed \u0111\u1ee9ng\/tr\u1ea7n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Back_purging_cho_inox_tieu_chuan_mau_va_O2_ppm\" >Back purging cho inox: ti\u00eau chu\u1ea9n m\u00e0u v\u00e0 O2 ppm<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Kiem_soat_nhiet_va_bien_dang\" >Ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0 bi\u1ebfn d\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Khuyet_tat_thuong_gap_va_cach_khac_phuc\" >Khuy\u1ebft t\u1eadt th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Xu_ly_sau_han_tay_va_thu_dong_hoa\" >X\u1eed l\u00fd sau h\u00e0n: t\u1ea9y v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Dam_bao_chat_luong_WPSPQR_ferrite_va_chung_chi\" >\u0110\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng: WPS\/PQR, ferrite v\u00e0 ch\u1ee9ng ch\u1ec9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Chien_luoc_kinh_te_an_toan_tai_xuong_Viet_Nam\" >Chi\u1ebfn l\u01b0\u1ee3c kinh t\u1ebf &#038; an to\u00e0n t\u1ea1i x\u01b0\u1edfng Vi\u1ec7t Nam<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Checklist_nhanh_truoc_khi_bat_ho_quang\" >Checklist nhanh tr\u01b0\u1edbc khi b\u1eadt h\u1ed3 quang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Vi_du_WPS_tham_khao_%E2%80%93_304L_t_20_mm_moi_han_giap_moi\" >V\u00ed d\u1ee5 WPS tham kh\u1ea3o \u2013 304L t = 2.0 mm, m\u1ed1i h\u00e0n gi\u00e1p m\u1ed1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Nguon_tham_khao\" >Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/inoxcuongthinh.com\/han-tig-inox-a-z-ky-thuat-vat-lieu-bu-va-meo-moi-han-ngau-2\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Noi_dung_chinh\"><\/span>N\u1ed9i dung ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><a href=\"#toc-0-tig-la-gi-va-vi-sao-hop-ca-voi-inox\">TIG l\u00e0 g\u00ec v\u00e0 v\u00ec sao \u201ch\u1ee3p c\u1ea1\u201d v\u1edbi inox?<\/a><\/li>\n<li><a href=\"#toc-1-chuan-bi-dung-ngay-tu-dau\">Chu\u1ea9n b\u1ecb \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<\/a><\/li>\n<li><a href=\"#toc-2-cai-dat-tham-khao-theo-chieu-day-inox-dcen-argon\">C\u00e0i \u0111\u1eb7t tham kh\u1ea3o theo chi\u1ec1u d\u00e0y inox (DCEN, Argon)<\/a><\/li>\n<li><a href=\"#toc-3-ky-thuat-thao-tac-de-co-moi-han-dep-ngau\">K\u1ef9 thu\u1eadt thao t\u00e1c \u0111\u1ec3 c\u00f3 m\u1ed1i h\u00e0n \u0111\u1eb9p, ng\u1ea5u<\/a><\/li>\n<li><a href=\"#toc-4-back-purging-cho-inox-tieu-chuan-mau-va-o2-ppm\">Back purging cho inox: ti\u00eau chu\u1ea9n m\u00e0u v\u00e0 O2 ppm<\/a><\/li>\n<li><a href=\"#toc-5-kiem-soat-nhiet-va-bien-dang\">Ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0 bi\u1ebfn d\u1ea1ng<\/a><\/li>\n<li><a href=\"#toc-6-khuyet-tat-thuong-gap-va-cach-khac-phuc\">Khuy\u1ebft t\u1eadt th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/a><\/li>\n<li><a href=\"#toc-7-xu-ly-sau-han-tay-va-thu-dong-hoa\">X\u1eed l\u00fd sau h\u00e0n: t\u1ea9y v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a<\/a><\/li>\n<li><a href=\"#toc-8-dam-bao-chat-luong-wpspqr-ferrite-va-chung-chi\">\u0110\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng: WPS\/PQR, ferrite v\u00e0 ch\u1ee9ng ch\u1ec9<\/a><\/li>\n<li><a href=\"#toc-9-chien-luoc-kinh-te-an-toan-tai-xuong-viet-nam\">Chi\u1ebfn l\u01b0\u1ee3c kinh t\u1ebf &#038; an to\u00e0n t\u1ea1i x\u01b0\u1edfng Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-10-checklist-nhanh-truoc-khi-bat-ho-quang\">Checklist nhanh tr\u01b0\u1edbc khi b\u1eadt h\u1ed3 quang<\/a><\/li>\n<li><a href=\"#toc-11-vi-du-wps-tham-khao-304l-t-20-mm-moi-han-giap-moi\">V\u00ed d\u1ee5 WPS tham kh\u1ea3o \u2013 304L t = 2.0 mm, m\u1ed1i h\u00e0n gi\u00e1p m\u1ed1i<\/a><\/li>\n<li><a href=\"#toc-12-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-13-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>H\u00e0n TIG (GTAW) l\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u1ed1t l\u00f5i trong c\u1ea9m nang li\u00ean k\u1ebft inox nh\u1edd ki\u1ec3m so\u00e1t h\u1ed3 quang tinh t\u1ebf, m\u1ed1i h\u00e0n s\u1ea1ch v\u00e0 \u00edt bi\u1ebfn d\u1ea1ng. B\u00e0i vi\u1ebft n\u00e0y t\u1ed5ng h\u1ee3p k\u1ef9 thu\u1eadt, l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u b\u00f9 v\u00e0 c\u00e0i \u0111\u1eb7t t\u1ed1i \u01b0u \u0111\u1ec3 b\u1ea1n t\u1ea1o ra m\u1ed1i h\u00e0n inox \u0111\u1eb9p, ng\u1ea5u, \u0111\u1ea1t chu\u1ea9n s\u1ea3n xu\u1ea5t \u2013 t\u1eeb t\u1ea5m m\u1ecfng \u0111\u1ebfn \u1ed1ng v\u1ec7 sinh.<\/p>\n<h2 id=\"toc-0-tig-la-gi-va-vi-sao-hop-ca-voi-inox\"><span class=\"ez-toc-section\" id=\"TIG_la_gi_va_vi_sao_%E2%80%9Chop_ca%E2%80%9D_voi_inox\"><\/span>TIG l\u00e0 g\u00ec v\u00e0 v\u00ec sao \u201ch\u1ee3p c\u1ea1\u201d v\u1edbi inox?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; TIG (Gas Tungsten Arc Welding) d\u00f9ng \u0111i\u1ec7n c\u1ef1c tungsten kh\u00f4ng n\u00f3ng ch\u1ea3y, kh\u00ed b\u1ea3o v\u1ec7 tr\u01a1 (ch\u1ee7 y\u1ebfu Argon) t\u1ea1o h\u1ed3 quang \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ec1 m\u1eb7t h\u00e0n s\u1ea1ch.<br \/>\n&#8211; V\u1edbi inox austenitic\/duplex, TIG cho:<br \/>\n  &#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t r\u1ea5t t\u1ed1t \u2192 h\u1ea1n ch\u1ebf bi\u1ebfn m\u00e0u (heat tint) v\u00e0 bi\u1ebfn d\u1ea1ng.<br \/>\n  &#8211; H\u1ed3 quang t\u1eadp trung \u2192 ng\u1ea5u \u0111\u1ec1u, bavia th\u1ea5p, r\u1ed7 kh\u00ed \u00edt.<br \/>\n  &#8211; D\u1ec5 \u0111\u1ea1t ti\u00eau chu\u1ea9n v\u1ec7 sinh (sanitary) cho \u1ed1ng th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c v\u1edbi back purge chu\u1ea9n.<\/p>\n<h2 id=\"toc-1-chuan-bi-dung-ngay-tu-dau\"><span class=\"ez-toc-section\" id=\"Chuan_bi_dung_ngay_tu_dau\"><\/span>Chu\u1ea9n b\u1ecb \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Thiet_bi_dien_cuc_tungsten\"><\/span>Thi\u1ebft b\u1ecb &#038; \u0111i\u1ec7n c\u1ef1c tungsten<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Ngu\u1ed3n TIG DCEN (Direct Current Electrode Negative), c\u00f3 HF start v\u00e0 ch\u1ee9c n\u0103ng Pulse c\u00e0ng t\u1ed1t.<br \/>\n&#8211; Tungsten khuy\u1ebfn ngh\u1ecb cho inox: 2% Lanthanated (EWLa-2, xanh d\u01b0\u01a1ng) ho\u1eb7c 2% Ceriated (EWCe-2, x\u00e1m).<br \/>\n  &#8211; \u0110\u01b0\u1eddng k\u00ednh: 1.6 mm (t \u2264 2 mm), 2.4 mm (t 2\u20136 mm), 3.2 mm (t > 6 mm).<br \/>\n  &#8211; M\u00e0i d\u1ecdc tr\u1ee5c, g\u00f3c ch\u00f3p 20\u201330\u00b0, chi\u1ec1u d\u00e0i m\u00e0i \u2248 2.5\u20133 l\u1ea7n \u0111\u01b0\u1eddng k\u00ednh. Gi\u1eef \u0111\u1ea7u nh\u1ecdn, s\u1ea1ch.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khi_bao_ve_phu_kien\"><\/span>Kh\u00ed b\u1ea3o v\u1ec7 &#038; ph\u1ee5 ki\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Argon \u2265 99.99% (Grade 4.5). L\u01b0u l\u01b0\u1ee3ng tham kh\u1ea3o:<br \/>\n  &#8211; Ch\u1ee5p #6\u2013#8 th\u01b0\u1eddng: 8\u201312 l\/min.<br \/>\n  &#8211; Gas lens\/ch\u1ee5p l\u1edbn: 12\u201318 l\/min (l\u00e0m vi\u1ec7c ngo\u00e0i tr\u1eddi\/kh\u00f3 che gi\u00f3).<br \/>\n&#8211; D\u00f9ng gas lens \u0111\u1ec3 lu\u1ed3ng kh\u00ed t\u1ea7ng, c\u1ea3i thi\u1ec7n che ph\u1ee7 v\u00e0 \u0111\u1ed9 b\u00f3ng.<br \/>\n&#8211; Post-flow: 1 gi\u00e2y cho m\u1ed7i 10 A h\u00e0n (th\u01b0\u1eddng 5\u201312 s) \u0111\u1ec3 b\u1ea3o v\u1ec7 tungsten v\u00e0 ao h\u00e0n khi ngu\u1ed9i.<br \/>\n&#8211; Pre-flow: 0.2\u20130.5 s.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lam_sach_chong_nhiem_sat\"><\/span>L\u00e0m s\u1ea1ch &#038; ch\u1ed1ng nhi\u1ec5m s\u1eaft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; T\u1ea9y d\u1ea7u b\u1eb1ng acetone\/IPA; ch\u1ea3i b\u1eb1ng b\u00e0n ch\u1ea3i inox ri\u00eang; kh\u00f4ng d\u00f9ng \u0111\u00e1 c\u1eaft \u0111\u00e3 m\u00e0i th\u00e9p carbon.<br \/>\n&#8211; C\u1ea1nh v\u00e1t\/gap \u0111\u1ed3ng \u0111\u1ec1u; k\u1eb9p ch\u1eb7t ch\u1ed1ng h\u1edf m\u00e9p. T\u0103ng s\u1ed1 tack (50\u2013100 mm\/tack) \u0111\u1ec3 ki\u1ec3m so\u00e1t bi\u1ebfn d\u1ea1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vat_lieu_bu_chon_dung_ma_cho_dung_mac\"><\/span>V\u1eadt li\u1ec7u b\u00f9: ch\u1ecdn \u0111\u00fang m\u00e3 cho \u0111\u00fang m\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Theo AWS A5.9 \/ ISO 14343:<br \/>\n&#8211; 304\/304L \u2192 ER308L (ph\u1ed5 bi\u1ebfn nh\u1ea5t cho k\u1ebft c\u1ea5u 3xx).<br \/>\n&#8211; 316\/316L \u2192 ER316L (m\u00f4i tr\u01b0\u1eddng chloride, ch\u1ed1ng pitting t\u1ed1t h\u01a1n).<br \/>\n&#8211; 321\/347 \u2192 ER347 (niobium \u1ed5n \u0111\u1ecbnh carbide).<br \/>\n&#8211; 304 \u2194 th\u00e9p carbon\/dissimilar \u2192 ER309L (h\u1ec7 Ni\/Cr cao, ch\u1ed1ng n\u1ee9t n\u00f3ng).<br \/>\n&#8211; Duplex 2205 \u2192 ER2209; Super duplex 2507 \u2192 ER2594.<br \/>\n&#8211; Ferritic 430 \u2192 th\u01b0\u1eddng d\u00f9ng ER309L \u0111\u1ec3 tr\u00e1nh gi\u00f2n h\u1ea1t.<br \/>\n&#8211; \u0110\u01b0\u1eddng k\u00ednh que b\u00f9: 1.0\u20131.6 mm cho t\u1ea5m \u2264 2 mm; 2.0\u20132.4 mm cho d\u00e0y h\u01a1n.<br \/>\n&#8211; \u01afu ti\u00ean \u201cL\u201d (low carbon) \u0111\u1ec3 h\u1ea1n ch\u1ebf nh\u1ea1y c\u1ea3m \u0103n m\u00f2n tinh gi\u1edbi.<\/p>\n<h2 id=\"toc-2-cai-dat-tham-khao-theo-chieu-day-inox-dcen-argon\"><span class=\"ez-toc-section\" id=\"Cai_dat_tham_khao_theo_chieu_day_inox_DCEN_Argon\"><\/span>C\u00e0i \u0111\u1eb7t tham kh\u1ea3o theo chi\u1ec1u d\u00e0y inox (DCEN, Argon)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; 0.8\u20131.0 mm: 20\u201340 A; que b\u00f9 1.0\u20131.2 mm; xung 1\u20132 Hz, I n\u1ec1n 30\u201340% gi\u00fap ki\u1ec3m so\u00e1t nhi\u1ec7t.<br \/>\n&#8211; 1.5\u20132.0 mm: 45\u201380 A; que b\u00f9 1.2\u20131.6 mm; ch\u1ee5p #8, 8\u201310 l\/min.<br \/>\n&#8211; 3.0 mm: 80\u2013120 A; que b\u00f9 1.6\u20132.0 mm; c\u00f3 th\u1ec3 d\u00f9ng Ar\/He (75\/25) khi c\u1ea7n ng\u1ea5u s\u00e2u h\u01a1n.<br \/>\n&#8211; 6.0 mm: 130\u2013200 A; nhi\u1ec1u l\u1edbp; c\u00e2n nh\u1eafc backing bar\/\u0111\u1ec7m \u0111\u1ed3ng.<br \/>\nG\u1ee3i \u00fd xung (Pulse) cho h\u00e0n tay:<br \/>\n&#8211; T\u1ea7n s\u1ed1 1\u20132 Hz; I \u0111\u1ec9nh \u2248 d\u00f2ng h\u00e0n c\u1ea7n thi\u1ebft; I n\u1ec1n 30\u201350% I \u0111\u1ec9nh; duty 30\u201350%.<br \/>\nGi\u1edbi h\u1ea1n nhi\u1ec7t:<br \/>\n&#8211; Austenitic 3xx: gi\u1eef interpass < 150\u00b0C. Duplex: < 100\u00b0C.\n\n\n\n<h2 id=\"toc-3-ky-thuat-thao-tac-de-co-moi-han-dep-ngau\"><span class=\"ez-toc-section\" id=\"Ky_thuat_thao_tac_de_co_moi_han_dep_ngau\"><\/span>K\u1ef9 thu\u1eadt thao t\u00e1c \u0111\u1ec3 c\u00f3 m\u1ed1i h\u00e0n \u0111\u1eb9p, ng\u1ea5u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Goc_mo_chieu_dai_ho_quang_cap_day\"><\/span>G\u00f3c m\u1ecf, chi\u1ec1u d\u00e0i h\u1ed3 quang, c\u1ea5p d\u00e2y<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; G\u00f3c m\u1ecf 10\u201315\u00b0 \u0111\u1ea9y (push). Chi\u1ec1u d\u00e0i h\u1ed3 quang \u2248 1\u00d7 \u0111\u01b0\u1eddng k\u00ednh tungsten.<br \/>\n&#8211; Gi\u1eef \u0111\u1ea7u que b\u00f9 lu\u00f4n trong v\u00f9ng kh\u00ed tr\u01a1; c\u1ea5p d\u00e2y nh\u1ecbp theo xung ho\u1eb7c \u0111\u1ec1u tay, tr\u00e1nh ch\u1ea1m tungsten.<br \/>\n&#8211; \u201cWalk-the-cup\u201d gi\u00fap \u0111\u1ec1u bi\u00ean \u0111\u1ed9 \u1edf \u1ed1ng\/g\u00f3c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Han_tam_mong_%E2%89%A4_2_mm\"><\/span>H\u00e0n t\u1ea5m m\u1ecfng (\u2264 2 mm)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; \u01afu ti\u00ean xung, t\u0103ng t\u1ed1c \u0111\u1ed9 di chuy\u1ec3n; d\u00f9ng backing b\u1eb1ng \u0111\u1ed3ng\/nh\u00f4m \u0111\u1ec3 t\u1ea3n nhi\u1ec7t.<br \/>\n&#8211; Gap nh\u1ecf (0.3\u20130.5 mm) v\u00e0 tack d\u00e0y; c\u00f3 th\u1ec3 autogenous (kh\u00f4ng b\u00f9) v\u1edbi 0.8\u20131.2 mm nh\u01b0ng ch\u00fa \u00fd ch\u1ed1ng bi\u1ebfn m\u00e0u v\u00e0 nh\u1ea1y c\u1ea3m tinh gi\u1edbi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Han_ong_%E2%80%93_root_pass_voi_back_purge\"><\/span>H\u00e0n \u1ed1ng \u2013 root pass v\u1edbi back purge<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; B\u1ecbt hai \u0111\u1ea7u b\u1eb1ng \u0111\u00ea\/purge dam, b\u0103ng keo ch\u1ecbu nhi\u1ec7t; \u0111\u1ec3 l\u1ed7 tho\u00e1t kh\u00ed nh\u1ecf \u1edf ph\u00eda cao.<br \/>\n&#8211; X\u1ea3 kh\u00ed 4\u20136 l\u1ea7n th\u1ec3 t\u00edch b\u00ean trong, \u0111o O2 c\u00f2n < 100 ppm (\u1ed1ng v\u1ec7 sinh: < 50 ppm) tr\u01b0\u1edbc khi h\u1ed3 quang.\n- Thao t\u00e1c \u201ckeyhole\u201d nh\u1ecf, c\u1ea5p ER308L\/316L \u0111\u1ec1u; root l\u00fd t\u01b0\u1edfng m\u00e0u b\u1ea1c\/s\u00e1ng, kh\u00f4ng \u0111\u01b0\u1eddng h\u1ea1t \u0111\u01b0\u1eddng k\u00ednh \u0111\u01b0\u1eddng k\u00ednh \u0111\u01b0\u1eddng.\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"Vi_tri_dungtran\"><\/span>V\u1ecb tr\u00ed \u0111\u1ee9ng\/tr\u1ea7n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; T\u0103ng xung (2\u20134 Hz), gi\u1ea3m I n\u1ec1n \u0111\u1ec3 ao h\u00e0n d\u1ebbo h\u01a1n; \u0111\u1ea9y m\u1ecf ng\u01b0\u1ee3c tr\u1ecdng l\u1ef1c, d\u00e2y b\u00f9 \u00edt v\u00e0 nhanh.<\/p>\n<h2 id=\"toc-4-back-purging-cho-inox-tieu-chuan-mau-va-o2-ppm\"><span class=\"ez-toc-section\" id=\"Back_purging_cho_inox_tieu_chuan_mau_va_O2_ppm\"><\/span>Back purging cho inox: ti\u00eau chu\u1ea9n m\u00e0u v\u00e0 O2 ppm<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; M\u1ee5c ti\u00eau O2: < 100 ppm (k\u1ebft c\u1ea5u), < 50 ppm (sanitary theo th\u00f4ng l\u1ec7 nh\u00e0 m\u00e1y).\n- M\u00e0u nhi\u1ec7t sau h\u00e0n (m\u1eb7t ngo\u00e0i) ch\u1ec9 th\u1ecb oxy h\u00f3a:\n  - B\u1ea1c\/kh\u00f4ng m\u00e0u \u2192 t\u1ed1t nh\u1ea5t.\n  - V\u00e0ng r\u01a1m\/\u00e1nh v\u00e0ng nh\u1ea1t \u2192 ch\u1ea5p nh\u1eadn h\u1ea1n ch\u1ebf.\n  - Xanh t\u00edm\/\u0111en \u2192 c\u1ea7n t\u1ea9y\/passivation; th\u01b0\u1eddng do kh\u00ed che ph\u1ee7 k\u00e9m ho\u1eb7c nhi\u1ec7t cao.\n- M\u1eb7t trong (root) v\u1edbi \u1ed1ng th\u1ef1c ph\u1ea9m theo AWS D18.1 n\u00ean \u1edf tr\u1ea1ng th\u00e1i b\u1ea1c\/s\u00e1ng, kh\u00f4ng h\u1ea1t \u0111\u01b0\u1eddng.\n\n\n\n<h2 id=\"toc-5-kiem-soat-nhiet-va-bien-dang\"><span class=\"ez-toc-section\" id=\"Kiem_soat_nhiet_va_bien_dang\"><\/span>Ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0 bi\u1ebfn d\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Chu\u1ed7i tack v\u00e0 h\u00e0n z\u00edch-z\u1eafc\/\u0111\u1ed1i x\u1ee9ng; chia \u0111o\u1ea1n ng\u1eafn (stitch).<br \/>\n&#8211; D\u00f9ng \u0111\u1ed3 g\u00e1, thanh \u0111\u1ed3ng l\u00e0m \u201cchiller\u201d, h\u1ea1n ch\u1ebf \u0111\u1ea7u v\u00e0o nhi\u1ec7t.<br \/>\n&#8211; Xung TIG, que nh\u1ecf, t\u1ed1c \u0111\u1ed9 cao; tr\u00e1nh l\u01b0u h\u1ed3 quang l\u00e2u t\u1ea1i m\u1ed9t \u0111i\u1ec3m.<\/p>\n<h2 id=\"toc-6-khuyet-tat-thuong-gap-va-cach-khac-phuc\"><span class=\"ez-toc-section\" id=\"Khuyet_tat_thuong_gap_va_cach_khac_phuc\"><\/span>Khuy\u1ebft t\u1eadt th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; R\u1ed7 kh\u00ed: b\u1ea9n\/\u1ea9m, l\u01b0u l\u01b0\u1ee3ng kh\u00ed th\u1ea5p, h\u1ed3 quang d\u00e0i \u2192 l\u00e0m s\u1ea1ch k\u1ef9, t\u0103ng kh\u00ed, r\u00fat ng\u1eafn h\u1ed3 quang.<br \/>\n&#8211; Thi\u1ebfu ng\u1ea5u: d\u00f2ng th\u1ea5p\/qu\u00e1 nhanh\/\u00e9p g\u00f3c sai \u2192 t\u0103ng d\u00f2ng nh\u1eb9, gi\u1ea3m t\u1ed1c, ch\u1ec9nh g\u00f3c 10\u201315\u00b0.<br \/>\n&#8211; Ch\u00e1y c\u1ea1nh\/undercut: d\u00f2ng qu\u00e1 cao\/h\u1ed3 quang d\u00e0i \u2192 gi\u1ea3m d\u00f2ng, s\u00e1t m\u1ecf, c\u1ea5p d\u00e2y k\u1ecbp th\u1eddi.<br \/>\n&#8211; \u201cSugaring\u201d (oxy h\u00f3a m\u1eb7t sau): purge k\u00e9m \u2192 b\u1ecbt k\u00edn, \u0111o O2, t\u0103ng th\u1eddi gian x\u1ea3.<br \/>\n&#8211; L\u1eabn tungsten: ch\u1ea1m que\/h\u1ed3 quang b\u1ea9n \u2192 m\u00e0i l\u1ea1i tungsten, gi\u1eef kho\u1ea3ng c\u00e1ch.<br \/>\n&#8211; N\u1ee9t n\u00f3ng: FN qu\u00e1 th\u1ea5p, nhi\u1ec7t v\u00e0o cao \u2192 ch\u1ecdn que b\u00f9 c\u00f3 FN 3\u201310 (308L\/316L chu\u1ea9n), gi\u1ea3m nhi\u1ec7t.<\/p>\n<h2 id=\"toc-7-xu-ly-sau-han-tay-va-thu-dong-hoa\"><span class=\"ez-toc-section\" id=\"Xu_ly_sau_han_tay_va_thu_dong_hoa\"><\/span>X\u1eed l\u00fd sau h\u00e0n: t\u1ea9y v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; T\u1ea9y s\u1ea1ch m\u00e0u nhi\u1ec7t\/bavia b\u1eb1ng:<br \/>\n  &#8211; Ch\u1ea3i inox, \u0111\u00e1nh Scotch-Brite, ho\u1eb7c gel t\u1ea9y g\u1ed1c HF\/HNO3 theo ASTM A380\/A967; r\u1eeda trung h\u00f2a k\u1ef9.<br \/>\n&#8211; Th\u1ee5 \u0111\u1ed9ng h\u00f3a kh\u00f4i ph\u1ee5c l\u1edbp Cr2O3: d\u00f9ng dung d\u1ecbch nitric\/citric theo h\u01b0\u1edbng d\u1eabn ti\u00eau chu\u1ea9n.<br \/>\n&#8211; Y\u00eau c\u1ea7u b\u1ec1 m\u1eb7t ng\u00e0nh th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c: root s\u00e1ng, b\u1ec1 m\u1eb7t Ra th\u1ea5p; c\u00e2n nh\u1eafc \u0111\u00e1nh b\u00f3ng c\u01a1 h\u1ecdc sau t\u1ea9y.<\/p>\n<h2 id=\"toc-8-dam-bao-chat-luong-wpspqr-ferrite-va-chung-chi\"><span class=\"ez-toc-section\" id=\"Dam_bao_chat_luong_WPSPQR_ferrite_va_chung_chi\"><\/span>\u0110\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng: WPS\/PQR, ferrite v\u00e0 ch\u1ee9ng ch\u1ec9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; L\u1eadp WPS\/PQR theo ASME IX ho\u1eb7c ISO 15614-1; th\u1ee3 h\u00e0n theo ISO 9606-1.<br \/>\n&#8211; Ch\u1ecdn que b\u00f9 \u201cL\u201d v\u00e0 th\u00e0nh ph\u1ea7n \u0111\u1ec3 \u0111\u1ea1t FN weld metal \u2248 3\u201310 theo WRC-1992 (gi\u1ea3m n\u1ee9t n\u00f3ng, v\u1eabn ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t).<br \/>\n&#8211; \u1ed0ng v\u1ec7 sinh: tham chi\u1ebfu AWS D18.1 v\u1ec1 ti\u00eau ch\u00ed h\u00ecnh d\u1ea1ng v\u00e0 v\u1ec7 sinh m\u1ed1i h\u00e0n.<\/p>\n<h2 id=\"toc-9-chien-luoc-kinh-te-an-toan-tai-xuong-viet-nam\"><span class=\"ez-toc-section\" id=\"Chien_luoc_kinh_te_an_toan_tai_xuong_Viet_Nam\"><\/span>Chi\u1ebfn l\u01b0\u1ee3c kinh t\u1ebf &#038; an to\u00e0n t\u1ea1i x\u01b0\u1edfng Vi\u1ec7t Nam<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Kh\u00ed: Argon 40 L\/150 bar ph\u1ed5 bi\u1ebfn; ki\u1ec3m tra \u0111\u1ed9 tinh khi\u1ebft, tr\u00e1nh b\u00ecnh g\u1ea7n c\u1ea1n g\u00e2y l\u01b0u l\u01b0\u1ee3ng \u201cgi\u1eadt\u201d.<br \/>\n&#8211; Pha Ar\/He cho t\u1ea5m d\u00e0y t\u0103ng t\u1ed1c \u0111\u1ed9\/\u0111\u1ed9 ng\u1ea5u nh\u01b0ng chi ph\u00ed cao \u2013 ch\u1ec9 d\u00f9ng khi c\u1ea7n.<br \/>\n&#8211; V\u1eadt t\u01b0 s\u1eb5n c\u00f3: ER308L\/316L (Kobelco, Kiswel, ESAB\u2026), \u00d8 1.2\u20132.4 mm; gas lens, ch\u1ee5p #6\u2013#12, b\u0103ng keo purge.<br \/>\n&#8211; An to\u00e0n:<br \/>\n  &#8211; Kh\u00f3i h\u00e0n inox c\u00f3 Cr(VI) \u2013 th\u00f4ng gi\u00f3 c\u1ee5c b\u1ed9, m\u1eb7t n\u1ea1 P100\/ABEK theo khuy\u1ebfn ngh\u1ecb an to\u00e0n.<br \/>\n  &#8211; Gel t\u1ea9y ch\u1ee9a HF r\u1ea5t nguy hi\u1ec3m: g\u0103ng\/n\u00f3n\/ki\u1ebfng, canxi gluconate s\u1eb5n s\u00e0ng, tu\u00e2n th\u1ee7 quy tr\u00ecnh SDS.<\/p>\n<h2 id=\"toc-10-checklist-nhanh-truoc-khi-bat-ho-quang\"><span class=\"ez-toc-section\" id=\"Checklist_nhanh_truoc_khi_bat_ho_quang\"><\/span>Checklist nhanh tr\u01b0\u1edbc khi b\u1eadt h\u1ed3 quang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; V\u1eadt li\u1ec7u s\u1ea1ch, kh\u00f4ng nhi\u1ec5m s\u1eaft; tungsten m\u00e0i \u0111\u00fang.<br \/>\n&#8211; Ch\u1ee5p &#038; gas lens ph\u00f9 h\u1ee3p; l\u01b0u l\u01b0\u1ee3ng kh\u00ed \u0111\u00e3 ki\u1ec3m tra.<br \/>\n&#8211; C\u00e0i \u0111\u1eb7t: DCEN, pre\/post-flow chu\u1ea9n; xung n\u1ebfu h\u00e0n m\u1ecfng\/out-of-position.<br \/>\n&#8211; Que b\u00f9 \u0111\u00fang m\u00e3 (308L\/316L\/309L\/2209\u2026) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh; l\u01b0u tr\u1eef kh\u00f4, s\u1ea1ch.<br \/>\n&#8211; Purge \u0111\u1ea1t < 100 ppm O2 (\u1ed1ng): x\u00e1c nh\u1eadn b\u1eb1ng \u0111\u1ed3ng h\u1ed3 O2.\n- K\u1eb9p\/\u0111\u1ed3 g\u00e1 \u1ed5n \u0111\u1ecbnh; tack \u0111\u1ee7 d\u00e0y; c\u00f3 k\u1ebf ho\u1ea1ch tr\u00ecnh t\u1ef1 h\u00e0n.\n\n\n\n<h2 id=\"toc-11-vi-du-wps-tham-khao-304l-t-20-mm-moi-han-giap-moi\"><span class=\"ez-toc-section\" id=\"Vi_du_WPS_tham_khao_%E2%80%93_304L_t_20_mm_moi_han_giap_moi\"><\/span>V\u00ed d\u1ee5 WPS tham kh\u1ea3o \u2013 304L t = 2.0 mm, m\u1ed1i h\u00e0n gi\u00e1p m\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; Q\u00faa tr\u00ecnh: GTAW DCEN, Argon 99.99%.<br \/>\n&#8211; Tungsten: EWLa-2, \u00d8 1.6 mm, g\u00f3c 25\u00b0.<br \/>\n&#8211; D\u00f2ng\/\u0111i\u1ec7n \u00e1p: 65\u201380 A, arc length \u2248 1\u00d7\u00d8 tungsten.<br \/>\n&#8211; Kh\u00ed: ch\u1ee5p #8 + gas lens; 10 l\/min; pre 0.3 s; post 8 s.<br \/>\n&#8211; V\u1eadt li\u1ec7u b\u00f9: ER308L \u00d8 1.6 mm.<br \/>\n&#8211; Pulse: 1.5 Hz; I\u0111\u1ec9nh 75 A; In\u1ec1n 35% I\u0111\u1ec9nh; duty 40%.<br \/>\n&#8211; Back purge: Argon 10\u201312 l\/min \u0111\u1ebfn khi O2 < 80 ppm.\n- Interpass < 120\u00b0C; l\u00e0m s\u1ea1ch &#038; passivation theo ASTM A380.\n\n\n\n<h2 id=\"toc-12-nguon-tham-khao\"><span class=\"ez-toc-section\" id=\"Nguon_tham_khao\"><\/span>Ngu\u1ed3n tham kh\u1ea3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&#8211; AWS A5.9 \/ ISO 14343 \u2013 Ph\u00e2n lo\u1ea1i v\u1eadt li\u1ec7u b\u00f9 h\u00e0n inox.<br \/>\n&#8211; AWS D18.1 \u2013 Welding of Austenitic Stainless Steel Tube and Pipe Systems in Sanitary Service.<br \/>\n&#8211; ASME Section IX \/ ISO 15614-1 \/ ISO 9606-1 \u2013 Quy c\u00e1ch quy tr\u00ecnh &#038; ch\u1ee9ng ch\u1ec9 th\u1ee3 h\u00e0n.<br \/>\n&#8211; WRC-1992 Diagram \u2013 D\u1ef1 \u0111o\u00e1n Ferrite Number trong kim lo\u1ea1i m\u1ed1i h\u00e0n.<br \/>\n&#8211; ASTM A380 \/ A967 \u2013 L\u00e0m s\u1ea1ch, t\u1ea9y v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a inox sau h\u00e0n.<br \/>\n&#8211; Miller\/Lincoln\/ESAB TIG Handbooks; Avesta Welding Handbook \u2013 Th\u1ef1c h\u00e0nh tham s\u1ed1 &#038; kh\u00ed b\u1ea3o v\u1ec7.<\/p>\n<h2 id=\"toc-13-ket-luan\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 h\u00e0n TIG inox \u0111\u1ea1t m\u1ed1i h\u00e0n \u0111\u1eb9p, ng\u1ea5u v\u00e0 b\u1ec1n \u0103n m\u00f2n, h\u00e3y ki\u1ec3m so\u00e1t 4 tr\u1ee5 c\u1ed9t: v\u1eadt li\u1ec7u b\u00f9 \u0111\u00fang m\u00e1c (\u01b0u ti\u00ean L), kh\u00ed b\u1ea3o v\u1ec7 &#038; back purge s\u1ea1ch, c\u00e0i \u0111\u1eb7t\/d\u00f2ng ph\u00f9 h\u1ee3p chi\u1ec1u d\u00e0y (\u01b0u ti\u00ean xung cho t\u1ea5m m\u1ecfng), v\u00e0 thao t\u00e1c chu\u1ea9n (g\u00f3c m\u1ecf, h\u1ed3 quang ng\u1eafn, c\u1ea5p d\u00e2y s\u1ea1ch). K\u00e8m theo x\u1eed l\u00fd sau h\u00e0n v\u00e0 ki\u1ec3m so\u00e1t FN, b\u1ea1n s\u1ebd \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u1ea3 ti\u00eau chu\u1ea9n k\u1ebft c\u1ea5u l\u1eabn v\u1ec7 sinh.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn que b\u00f9, kh\u00ed, ph\u1ee5 ki\u1ec7n v\u00e0 inox \u0111\u00fang chu\u1ea9n cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t.<br \/>\nHotline: 0343.417.281<br \/>\nEmail: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn TIG inox t\u1eeb chu\u1ea9n b\u1ecb, ch\u1ecdn que b\u00f9 ER308L\/316L, c\u00e0i \u0111\u1eb7t d\u00f2ng\/kh\u00ed, back purge \u0111\u1ebfn x\u1eed l\u00fd sau h\u00e0n \u0111\u1ec3 c\u00f3 m\u1ed1i h\u00e0n \u0111\u1eb9p, ng\u1ea5u, s\u1ea1ch chu\u1ea9n c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"author":7,"featured_media":1038,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=2295"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2295\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1038"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}