摘要
研究焊后热处理(PWHT)对309L焊缝金属的力学性能及显微组织的影响。结果表明,焊后热处理的保温时间对309L焊缝金属的力学性能影响很大,特别是韧性和延性;随着焊后热处理的保温时间的增加,其显微组织中的σ相含量逐渐增加,铁素体的含量逐渐减少;本试验条件下,焊后热处理保温时间在24 h之内时,对309L熔敷金属的断后伸长率没有明显的影响。
The effects of post-weld heat treatment(PWHT) on the mechanical properties and microstruc- ture in 309L weld metals were studied. The results show that:The heat preservation time of PWHT has great influence on the mechanical properties of 309L weld metals, especially for toughness and ductility; The content of σ phase in the microstructure increases with the increasing of the heat preservation time after heat treatment;Under this experiment condition, PWHT within 24 hours has no obvious effect on the elongation of the tensile test in 309L weld metals.
作者
顾佳磊
张文杨
丁阳
GU Jia - lei ZHANG Wen - yang DING Yang(Shanghai Electric Nuclear Power Equipment Co. , Ltd. , Shanghai 201306, China Shanghai Engineering Research Center of Nuclear Power Equipment Welding and Examination ,Shanghai 201306, China)
出处
《压力容器》
2017年第7期5-10,共6页
Pressure Vessel Technology
关键词
309L焊缝金属
焊后热处理
Σ相
309L weld metals
post-weld heat treatment(PWHT)
σ phase