摘要
采用小孔法对GH907/GH141高温合金板材电子束焊接及热处理后残余应力进行了测试,分析了焊接过程对残余应力的变化以及热处理工艺对于残余应力的影响。结果表明,GH907/GH141高温合金板材电子束焊后焊缝处残余应力最大,平均峰值为718 MPa,接近两种母材的屈服强度;热时效处理后焊缝处残余应力峰值降低了15%~20%,GH141一侧下降较为缓慢;固溶时效处理后焊缝处应力峰值降低了72%～80%,且热影响区及母材应力数值都更小更均匀,焊后采用固溶时效处理可以有效降低应力大小并改善其分布。
The residual stress distribution of superalloy GH907/GH141 dissimilar materials sheets welded by electron beam after heat treatment was measured by hole drilling method. The variation of residual stress in the welding process and the heat treatment effect on the release of residual stress were analyzed. The results indicate that at the location of welding joint the residual stress is maximum. The average maximum value is 718 MPa which is close to the yield strength of the base materials. The maximum value of the residual stress decreases by 15% to 20% after aging treatment. Residual stress decreases slowly on the side of GH141 alloy. The maximum residual stress of the welding joint is decreased by 72% to 80% after solid solution and aging treatment, and the stress of heat affected zone and base metal become lower and stable. Solid solution and aging treatment is found to decrease and adjust the residual stress effectively.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第2期245-248,共4页
Transactions of Materials and Heat Treatment
关键词
高温合金
电子束焊
固溶时效
残余应力
superalloys
electron beam welding
solid solution aging
residual stress
