铝合金车体双脉冲仰焊焊缝气孔的讨论与控制  

Discussion and control on porosity of overhead position weld with synchropulse MIG welding for aluminum alloy carbody

作　　者：张健 程石来 张永杰 唐海鹰 

机构地区：[1]青岛四方庞巴迪铁路运输设备有限公司,266111

出　　处：《焊接》2013年第7期59-62,72,共4页Welding & Joining

摘　　要：利用双脉冲MIG焊进行铝合金车体总组成侧墙下墙板与底架边梁型材焊接试验,对现有车体结构该部分焊缝气孔的形成原因进行探讨,并提出相关控制措施。试验结果表明,该焊缝结构条件下,采用φ1.2mm焊丝进行双脉冲焊接的焊缝气孔率要高于φ1.6 mm焊丝的焊缝;φ1.6 mm焊丝进行焊接时能够在较短时间内保证焊缝达到较好熔透性,并利于气泡快速逸出熔池,焊缝气孔率达标。Synchropulse MIG welding was applied in the welding test of the seam between plate of sidewall and solebar of underframe,and the reason of the weld porosity for the weld of this part was discussed,and the measure to control porosity was also proposed.The test resulte indicated that the porosity of weld with the wire of Φ1.2 mm is higher than that with Φ1.6 mm wire.With the wire of Φ1.6 mm and synchropulse MIG welding,better penetration can be obtained,and pores can escape from the molten pool in a short time,and weld porosity meets the standard.

关 键 词：仰焊气孔双脉冲MIG焊熔透性焊丝 

分 类 号：TG444.74[金属学及工艺—焊接]