摘要
采用三种焊接热输入对新开发的低碳贝氏体ADB610钢进行焊接,对其焊接接头的微观组织和力学性能进行了试验研究。结果表明,焊接接头的母材区、焊缝区和热影响区组织均为铁素体和贝氏体,在铁素体和贝氏体上还弥散分布着渗碳体;焊接热输入对焊缝区组织和冲击性能影响显著,过大的焊接热输入会使焊缝区贝氏体含量减少,铁素体含量增大,晶粒变粗大,冲击韧性明显降低。
The microstructure test and mechanical tests were carried out on welded joints of ADB610 steel welded by a new type of low carbon bainite under three kinds of weld heat input. By the metallographic microstructure analysis, it is found that there is ferrite and bainite in base material zone, weld metal zone and heat-affected zone, and there are Fe3C dispersing on the surface ferrite and bainite. The weld heat input has great influences on the microstructure and mechanical property in weld metal zone. Increasing weld heat input, the quantity of bainite decreases and the quantity of ferrite increases, and crystalline grain is larger in weld metal zone. From the analysis on data of tension test, the impact toughness test and bending test, it can be concluded that the welded joints of ADB610 steel have higher strength, excellent impact toughness at low temperature. In weld metal zone ,the bainite contnet increases, the content of ferrite increases ,the grain size increases, then the impact toughness decreases with the increase of weld heat input.
出处
《热加工工艺》
CSCD
北大核心
2012年第19期193-195,共3页
Hot Working Technology
