摘要
采用激光-TIG电弧复合胶焊技术实现了AZ61镁合金与Q235钢之间的良好连接.重点讨论了激光-TIG复合胶焊的焊缝表面形貌、焊缝区组织及元素分布特征.结果表明,在胶粘剂厚度一定时,焊接热输入是影响焊缝成形的关键因素.胶粘剂在复合热源作用下分解气化并逸出熔池,在一定程度上增强熔池内部液态金属的流动性,促进熔池内部异质金属之间冶金反应和相互混合.通过镍合金层与胶粘剂的综合作用使镁/钢异质材料之间以冶金反应形式连接,提高了镁/钢异质金属连接结构的线载荷,增强了镁/钢异质金属的整体性能.
Laser-TIG-adhesive hybrid welding was carried out to join AZ61 magnesium alloy to Q235 steel with Ni interlayer. Weld surface appearance,microstructure and distribution ofalloying elements in the fusion zone were investigated. The experimental results indicate that the welding heat input was the key factor on the weld surface formation when the thickness of adhesive was constant. The seam was mainly composed of Mg, Fe and Ni. In the fusion zone,the addition of adhesive reinforced the liquidity and promoted the reaction among molten metals. The AZ61 magnesium alloy and steel were metallurgically bonded,and the liner load capacity of the resultant joint increased. The comprehensive performance of the joint was improved.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2014年第4期83-86,117,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金青年基金资助项目(51304034)
中央高校基本科研业务费专项资金资助项目(DUT12LAB14)
