电焊机2026，Vol.56Issue(6)：78-83,91,7.DOI:10.7512/j.issn.1001-2303.2026.06.10
钨极氩弧焊焊接参数对M951高温合金的焊接热裂纹影响机制研究
Investigation into the Mechanism of Hot Cracking in M951 Superalloy Influenced by Tungsten Inert Gas Welding Parameters
摘要
Abstract
The application of Tungsten Inert Gas(TIG)welding technology for repairing aero-engine hot-section compo-nents made of nickel-based superalloy M951 offers significant advantages in reducing maintenance costs and extending ser-vice life.This study systematically investigates the influence of arc welding parameters and filler materials on the hot crack-ing susceptibility of M951 superalloy,with particular focus on the crack initiation locations and underlying mechanisms un-der various welding conditions.Experimental results demonstrate that weld joints deposited with M951 filler wire exhibit markedly lower cracking susceptibility compared to those fabricated using GH4169 filler wire.The total crack length and number of cracks within the joint initially increase and then decrease with rising welding current.At lower current levels,cracks primarily propagate along the weld centerline,presenting as solidification cracks along interdendritic boundaries in the fusion zone.In contrast,higher welding currents promote the formation of liquation cracks within the heat-affected zone(HAZ).The minimum susceptibility to hot cracking was achieved at a welding current of 40 A.关键词
M951高温合金/钨极氩弧焊/焊接工艺参数/焊接裂纹敏感性Key words
M951 superalloy/TIG welding/welding process parameters/weld crack susceptibility分类
矿业与冶金引用本文复制引用
文明月,崔书瑞,王雪峰,王诗洋,孙元..钨极氩弧焊焊接参数对M951高温合金的焊接热裂纹影响机制研究[J].电焊机,2026,56(6):78-83,91,7.基金项目
辽宁省教育厅青年基金项目(LJKQZ202230) （LJKQZ202230）
国家自然科学基金(52301098) （52301098）
