某低合金铸钢的焊接性能分析  

Analysis on Welding Performance of Low-alloy Cast Steel

作　　者：毕欢[1] 周杰[1] 刘阳[1] 卢顺[1] 丁永峰[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400030

出　　处：《热加工工艺》2012年第1期145-146,共2页Hot Working Technology

摘　　要：研究了低合金铸钢焊接接头的显微组织及其力学性能。结果表明,焊接接头熔合区低合金铸钢一侧形成脱碳层和柱状晶区,使热影响区的硬度降低,焊接接头的伸长率减小,但对其屈服强度和抗拉强度影响不大。低合金铸钢的热稳定性较差,受焊接余热影响,热影响区内的碳化物开始分解。The microstructure and mechanical properties of the welded joints in low-alloy steel were studied.The results show that the decarburization layer and the columnar zone form at the side of low-alloy steel,which can decrease the hardness in the heat affected zone and reduce the elongation in the welded joint,but does little effect on the yield strength and tensile strength.Low-alloy steel is poor in thermal stability.Due to the effect of welding waste heat,the carbide in the heat-affected zone begins to decompose.

关 键 词：低合金钢铸钢 热影响区 显微组织 力学性能 

分 类 号：TG406[金属学及工艺—焊接]