Ni-Mo-Cr-V材料焊接回火脆性浅析  

Analysis on the Temper Brittleness of Ni-Mo-Cr-V Material in Welding

作　　者：钟玉[1] 张从平[1] 曹天兰[1] 梁刚[1] 徐永峰[1] 

机构地区：[1]东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2013年第1期49-52,共4页Dongfang Turbine

摘　　要：文章研究了Ni-Mo-Cr-V锻件材料经不同的热处理过程后焊缝金属冲击韧性变化情况,并通过投射电子显微镜观察及回火脆性敏感系数J、X计算分析。试验结果表明,在锻件材料和焊材中杂质元素及合金元素的共同作用下,焊缝金属热处理后晶界处析出物为Fe3C或合金渗碳体,降低了焊缝金属的韧性;焊缝金属回火脆性敏感系数J、X数值大大增加,增加了其产生回火脆性的概率。This paper studies on impact toughness of weld metal after different heat treatment process about Ni-Mo-Cr-V material, and observes by transmission electron microscope and analyzes by temper brittleness sensitivity coefficient J, X. The result indicates that Fe3C or alloy cementite are separated out in grain boundary after heat treatment in weld metal, which reduces the toughness of weht metal, and the numeric value of temper brittleness sensitivity coefficient J, X is increased obviously in weld metal, which grows the probability of temper brittleness occurring.

关 键 词：热处理 回火脆性 晶界 敏感系数 

分 类 号：TG161.5[金属学及工艺—热处理]