摘要
本文用横向可变拘束法，对不同合金系列的奥氏体不锈钢焊条的熔敷金属进行了试验，井用电镜，能谱对断口的形貌进行了观察分析，结果表明，抗热裂性能较差的熔敷金属断口形貌可由角形扩展成矩形。在温度、应变速率一定的条件下，通过调整Ｃｒ＿（ｅｑ）／Ｎｉ＿（ｅｑ）比值变抗热裂性能，本文所研究的Ｃｒ２９Ｎｉ１９焊条的熔敷金属Ｃｒ＿（ｅｑ）／Ｎｉ＿（ｅｑ）＝１．７，且铁素体平均含量大于１５％时，焊缝具有良好的抗热裂性能。
The deposited metals of austenitic stainless steel type covered electrode with differentalloy system are tested by using Trans-varestraint test. Their fracture morphologies of cracks are observered with EPSA. The results show that when the crack-resisting capacity of deposited met-al is poor the crack fracture morphologies appear a development from prism to rectangle.The content of ferrite in weld metal is one of important factors affecting the solidificationcarck sensibility of austentic stainless steels deposited metal. While the temperature and strain rateare constant the crack-resisting property can be obivously improved through changing the ratioof .The deposited metal of the type covered electrode researched inthis paper possesses better crackresisting property when its is 1.7 and its ferritecontent is more than 1 5 pereent.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1995年第2期62-67,共6页
Transactions of The China Welding Institution
关键词
奥氏体不锈钢
结晶裂纹
断口形貌
焊条
焊接
Trans-varestrain test
austenitic stainless covered electrode
solidification crack
weldmetal
