焊接电流对普碳钢焊件组织性能的影响  

Effect of welding current on the microstructure and properties of plain carbon steel welding

作　　者：宗云[1] 杜见第[1] 郭海龙[1] 刘英磊[1] 唐传政[1] 李春林[1] 翁子清[1] 刘宏[1] 

机构地区：[1]山东轻工业学院机械工程学院,山东济南250353

出　　处：《山东轻工业学院学报（自然科学版）》2010年第4期24-27,共4页Journal of Shandong Polytechnic University

摘　　要：焊接工艺参数是影响焊件焊缝材料性的能主要因素。本文采用不同焊接电流对Q235B进行手弧焊焊接,焊后观察焊缝区和热影响区内的组织,并进行了硬度、冲击韧性、抗拉强度等力学性能的测试。在金相显微镜下可观察到随焊接电流的变化,焊缝区与热影响区组织有明显的变化;焊接电流的变化对焊件性能的影响也比较明显。确定了在本实验条件下能获得综合性能最好的焊接电流是160 A。Welding process parameters is a major factor to affect the material properties.The manual metal-arc welding was used to weld Q235B under different welding current in this paper.The microstructure of welding seam and heat affected zone had been observed.The hardness,the impact toughness and the tensile strength of welding were tested.The results showed that the microstructure and the properties of welding seam and heat affected zone changed obviously with the welding current,and 160A was the best excellent comprehensive performance in this experiment conditions.

关 键 词：焊接电流 组织 硬度 抗拉强度 冲击韧性 

分 类 号：TG444.1[金属学及工艺—焊接]