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文章编号:1672-6987(2025)03-0110-09;DOI:10. 16351/j. 1672-6987. 2025. 03. 015
肖浚艺 1 ,胡校锋 1 ,卢 昆 1 ,潘家敬 1,2* ,何锡鑫 1 ,于 楠 2 ,王子福 3 ,肖燕玲 3 (1. 青岛科技大学 机电工程学院,山东 青岛 266061;2. 青特集团有限公司,山东 青岛 266106; 3. 青岛天惠辰科技有限公司,山东 青岛 266100)
摘 要:采用不同合金焊丝(ER2319、ER4043 和 ER5356)对 TC4 钛合金和 2A12 铝合金进行 MIG 电弧熔钎焊试验,结合数值仿真优化并模拟了焊接工艺(TC4 开 45°坡口),探讨了工程上 实现 Ti/Al异种合金有效焊接的界面结合机理。试验发现:焊接接头存在共晶组织、析出相和 多层结构(锯齿状反应层-白色反应层-暗色薄层);多层结构中存在 Ti(Al,Si)3、Ti(Al,Si)和 Ti3Al 等金属间化合物,推测 Si 元素利于接头性能提高;ER4043 焊丝所得接头的微观形貌较 为理想、结合强度最高,平均抗拉强度达 227 MPa。数值仿真发现:电弧向 2A12 侧 0. 5 mm 的 偏移、1. 32 kJ · cm−1 的热输入和 10 mm · s−1 的焊接速度更适合于形成结构均匀、应力较低的 良好接头。
关键词:MIG 电弧熔钎焊; TC4-2A12;数值仿真;反应层;金属间化合物
中图分类号:TG 444 文献标志码:A
引用格式:肖浚艺,胡校锋,卢昆,等 . Ti/Al异种合金 MIG 电弧熔钎焊工艺及界面结合机理 [J]. 青岛科技大学学报(自然科学版),2025,46(3):110-118.
XIAO Junyi, HU Xiaofeng, LU Kun, et al. Process and interface bonding mechanism of Ti/ Al dissimilar alloys mig arc welding-brazing[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition),2025,46(3):110-118.
Process and Interface Bonding Mechanism of Ti/Al Dissimilar Alloys MIG Arc Welding-Brazing
XIAO Junyi1 , HU Xiaofeng1 , LU Kun1 ,PAN Jiajing1 ,HE Xixin1 , YU Nan2 , WANG Zifu3 , XIAO Yanling3 (1. College of Electromechanical Engineering, Qingdao University of Science and Technology, Qindao 266061, China; 2. Qingte Group Co.,Ltd., Qindao 266106, China;3. Qingdao Tianhuichen Technology Co.,Ltd., Qingdao 266100, China)
Abstract:The MIG arc welding-brazing experiments of TC4 titanium alloy and 2A12 alumi num alloy were carried out with different alloy welding wires (ER2319, ER4043 and ER5356). Combined with numerical simulation, the welding process (TC4 with 45° groove) was optimized and simulated, and the interface bonding mechanism of effective welding of Ti/ Al dissimilar alloy in engineering was discussed. It is found that the welded joints exist eutectic structures, precipitates and multilayer structure (serrated reaction layer, white reaction layer, dark thin layer). There are intermetallic compounds such as Ti(Al,Si)3, Ti(Al,Si) and Ti3Al in the multilayer structure, and it is speculated that Si element is conducive to the improvement of joint properties. The micromorphology of the joint obtained by ER4043 welding wire is more desirable, the bonding strength is the highest, and the average tensile strength is 227 MPa. The numerical simulation shows that 0. 5 mm arc deflection to 2A12 side,1. 32 kJ · cm−1 heat input and 10 mm · s−1 welding speed are more suitable for forming good joints with uniform structure
and low stress.
Key words:MIG arc welding-brazing; TC4-2A12; numerical simulation; reaction layer;
intermetallic compounds
收稿日期:2024-05-09
基金项目:山东省自然科学基金项目(ZR2023ME201);中国博士后科学基金项目(2021M691703);青岛科技大学横向项目(40112023169).
作者简介:肖浚艺(1996—),男,硕士研究生 . * 通信联系人 .第 3 期
肖浚艺等:Ti/Al异种合金 MIG 电弧熔钎焊工艺及界面结合机理