摘要
介绍了采用SMAW,GTAW,ESW在SA-516Gr70上堆焊N06625合金和采用不同的热处理工艺对堆焊层耐腐蚀性能的影响,并对SMAW堆焊成分进行了微观分析,认为在堆焊化学成分中含碳量高是导致耐腐蚀性能差的关键因素。采用含碳量低的GTAW焊丝进行堆焊,通过缩小消应力热处理保温温度范围,对试样进行了3个循环的最大模拟消应力热处理,按ASTMG28A法进行耐腐蚀试验,最终达到了理想的的耐腐蚀合格指标。
The effects of different heat treatment processes on the corrosion resistance of N06625 alloy deposited on SA-516 Gr70 by SMAW,GTAW and ESW processes were introduced,and the composition of SMAW overlay was analyzed microscopically.It is believed that high carbon content in the chemical composition of the overlay is the key factor that causes its poor corrosion resistance.By performing overlay welding using GTAW process with low carbon wire and reducing stress-relief heat treatment temperature holding range,3 cycles of max.simulated stress-relief heat treatment were carried out on the specimens,and corrosion resistance test was carried out on them by ASTM G28A method,and the ideal corrosion resistance qualification indicators were finally achieved.
作者
齐淑改
Qi Shugai(Shanghai Morimatsu Pressure Vessel Co. ,Ltd.,Shanghai 200132,China)
出处
《压力容器》
北大核心
2019年第9期7-12,6,共7页
Pressure Vessel Technology
关键词
堆焊方法
G28A法
最大模拟热处理
保温温度
weld overlay process
G28A method
maximum simulatedheat treatment
holding temperature
