电焊机2025，Vol.55Issue(7)：106-111,6.DOI:10.7512/j.issn.1001-2303.2025.07.11
手工钨极氩弧焊修复密封面不锈钢堆焊层工艺技术研究
Research on the Process Technology of Manual Tungsten Argon Arc Welding for Repairing Stainless Steel Surfacing Layer on Sealing Surface
柏忠炼 1李诗易 1叶义海 1刘铖丹 1薛敬凯1
作者信息
- 1. 中国核动力研究设计院,四川 成都 610041
- 折叠
摘要
Abstract
In response to the local repair needs of the 308L stainless steel cladding layer on the sealing surface of nuclear re-actor pressure vessels,manual tungsten inert gas arc welding technology was employed.Welding tests were conducted on SA508-Ⅲ low-alloy steel base material mock-ups at different depths(1 mm,2 mm,3 mm)to systematically study the ther-mal impact of welding and the deformation characteristics of the weld toe area.The results show that when the total thick-ness of the stainless steel cladding layer is 6 mm and the welding current is 90 A,a repair depth of up to 3 mm will not cause thermal effects on the underlying low-alloy steel structure.Its microstructure remains in the original form of blocky ferrite and pearlite,with no hard and brittle martensite formation.The microhardness distribution in the weld and heat-affected zone is stable(weld area approximately 210 HV,stainless steel layer approximately 200 HV,low-alloy steel base material approxi-mately 120 HV).However,after repair,there is a maximum depression of 19.614 μm in the weld toe area,which needs to be eliminated by subsequent machining to ensure the flatness of the sealing surface.This study for the first time defines the safe process window for manual tungsten inert gas arc welding repair of the 308L cladding layer(≤3 mm repair depth/90 A cur-rent),providing a key technical basis for the precise local repair of the sealing surface of nuclear reactor pressure vessels.关键词
手工钨极氩弧焊/核反应堆压力容器/密封面修复/不锈钢堆焊层/热影响区/焊趾变形Key words
manual tungsten inert gas welding/nuclear reactor pressure vessel/sealing surface repair/stainless steel clad-ding layer/heat affected zone/weld toe deformation分类
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柏忠炼,李诗易,叶义海,刘铖丹,薛敬凯..手工钨极氩弧焊修复密封面不锈钢堆焊层工艺技术研究[J].电焊机,2025,55(7):106-111,6.
