摘要
时效温度是15-5PH沉淀硬化不锈钢熔敷金属时效处理的重要参数,对组织和性能具有重要的影响.采用钨极氩弧焊将研制的焊丝进行熔敷金属焊接试验,并将熔敷金属固溶处理后进行不同温度的时效处理,研究时效温度对熔敷金属组织和性能的影响.结果表明,时效处理后熔敷金属组织主要为马氏体、残余奥氏体和ε-Cu析出相.随着时效温度的增高,组织中奥氏体含量增多,尤其在621℃时含量急剧增加;马氏体板条析出ε-Cu尺寸逐渐增大,而数量先增多后减少;另外随着时效温度的增高,熔敷金属强度下降,而冲击韧性升高,这主要是由于残余奥氏体含量增多引起的.
Aging temperature is an important aging treatment parameter of deposited metal for type 15-5PH precipitation hardened stainless steel.The welding deposited metal was conducted by gas tungsten arc welding and aging treatment was carry out at different temperature after solution treatment.After aging treatment the microstructure and properties of deposited metal were investigated.The results indicate that microstructure of deposited metal by aging treatment consists predominately of martensite,residual austenite and ε-Cu.The increasing of aging temperature results in the increasing of amount of austenite and the size of ε-Cu,the variation of ε-Cu from increasing to decreasing.The strength of deposited metal drops and toughness improves with the increasing of aging temperature due to the increasing of amount of austenite.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2012年第10期105-108,118,共4页
Transactions of The China Welding Institution
关键词
时效温度
组织
性能
熔敷金属
aging temperature
microstructure
properties
deposited metal
