摘要
09MnNiDR低温钢在建造和安装容器时,不可避免要经受两次或多次焊后热处理,导致焊接接头性能发生变化,尤其是低温冲击韧性恶化,会带来极大的安全性隐患。以现场中可能出现的焊后热处理工艺为试验条件,研究不同热处理温度545℃、570℃、600℃以及每个温度下不同保温时间对焊接接头强度及低温冲击韧性的影响。通过数据分析发现,09MnNiDR钢可经受焊后热处理温度为545～600℃。当进行长时间热处理加热(反复加热2～3次)时,适用焊后热处理温度为545～570℃。
09MnNiDR low-temperature steel is utilized for building and installing container. In practice,the container is sometimes required to perform two or more post weld treatment(PWHT). This PWHT leads to the deterioration of welded joint properties,especially impact toughness at lower temperature. In this present work,The effects of different heat treatment temperatures of 545 ℃,570 ℃,600 ℃and duration time on strength and impact toughness of welded joint were studied. Three heat treatment temperatures were selected according to the installation site and condition. The result reveals that 545~600 ℃ is applicable PWHT temperature for 09MnNiDR lowtemperature steel. When PWHT times are more than twice,the proper PWHT temperature is 545~570 ℃.
作者
汪晶洁
吴君明
王红鸿
WANG Jingjie;WU Junming;WANG Honghong(Nanjing Iron and Steel Co.,Ltd.,Nanjing 210035,China;Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《电焊机》
2019年第3期28-30,共3页
Electric Welding Machine
关键词
低温钢
焊后热处理
冲击韧性
low-temperature steel
post weld heat treatment
impact toughness
