摘要
从制定低温钢07MnNiCrMoVDR的焊接及焊后热处理工艺着手,并对其母材、焊缝区和热影响区进行了低温冲击试验、不同温度断口纤维率的计算、断口宏观与微观观察及显微组织观察。结果表明,各区的低温冲击功均符合07MnNiCrMoVDR钢力学性能的要求,采取的焊接及焊后热处理工艺合理;通过断口纤维率的计算得知母材断口的纤维率高于热影响区的断口纤维率,焊缝区的最低,表明母材的低温冲击韧性最高,热影响区的低温冲击韧性高于焊缝区的,对各区显微组织的观察结果也证明了这一点。
Welding and postweld heat-treatment were carried out for low-temperature steel 07MnNiCrMoVDR.Low-temperature impact toughness was tested,the fiber percentage of fracture at different temperature was calculated,macroscopic and microscopic fracture and microstructure were analyzed for base metal,weld seam and heat-affected zone.The results indicate that impact energy of every zone meets requirement of 07MnNiCrMoVDR steel s mechanical property.It also shows that the chosen welding technology and postweld heat-...
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第6期68-72,116,共6页
Transactions of The China Welding Institution
关键词
焊接
低温钢
显微组织
低温冲击韧性
welding
low-temperature steel
microstructure
low-temperature impact toughness
