焊接热循环峰值温度对2.25Cr1Mo0.25V钢断口形貌的影响  

Effect of Welding Thermal Cycle Peak Temperature on Fracture Morphology of 2.25Cr1Mo0.25V Steel

作　　者：邓海涛[1] 胡传顺[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《热加工工艺》2015年第11期55-57,61,共4页Hot Working Technology

基　　金：辽宁省教育厅科学技术研究项目(LS2010098)

摘　　要：采用焊接热模拟方法、金相分析和扫描电镜试验,研究了不同峰值温度对2.25Cr1Mo0.25V钢焊接热影响区显微组织及断口形貌的影响。结果表明,峰值温度分别为750与850℃时,断口形貌为韧窝断裂。峰值温度为1000℃时,韧窝数量更多且分布均匀。峰值温度分别为1200与1320℃时,断口形貌为解理断裂。断裂方式从韧窝型变为解理型。The effects of peak temperatures on the fracture morphology of simulated heat-affected zone of 2.25Cr1Mo0.25 V steel were investigated by using welding thermal simulation test, metallographic analysis and scanning electron microscope experiment. The results show that the fracture morphology is dimple fracture, when the peak temperature is 750℃ and 850℃. When peak temperature is 1000℃, the dimple is more and the distribution is more even.At peak temperature of 1200℃ and 1320℃, the fracture morphology is cleavage fracture. The fracture mechanisms transform from dimple fracture to cleavage fracture.

关 键 词：2.25Cr1Mo0.25V钢 断口形貌 韧窝 焊接热模拟 

分 类 号：TG406[金属学及工艺—焊接]