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| 铝/钢搅拌摩擦辅助铆接接头界面特性研究 |
| Interface Characteristics of Riveted Al/Steel Joints by Assisted Friction Stir Welding |
| Received:July 21, 2019 Revised:September 10, 2019 |
| DOI：10.3969/j.issn.1674-6457.2019.05.013 |
| 中文关键词: 铝 钢 搅拌摩擦焊 界面 |
| 英文关键词: aluminum steel friction stir welding interface |
| 基金项目:大学生创新创业训练项目（2019HZ114）；国家自然科学基金（51865035）；江西省杰出青年基金（2018ACB21016）；江西省优势科技创新团队项目（20171BCB24007） |
| Author Name | Affiliation | | REN Hang | 1. Aviation Manufacturing Engineering Institute, Nanchang Hangkong University, Nanchang 330063, China | | LIU Hao | 1. Aviation Manufacturing Engineering Institute, Nanchang Hangkong University, Nanchang 330063, China
2. Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components, Nanchang Hangkong University, Nangchang 330063, China | | WU Geng-yi | 1. Aviation Manufacturing Engineering Institute, Nanchang Hangkong University, Nanchang 330063, China | | CHEN Yu-hua | 1. Aviation Manufacturing Engineering Institute, Nanchang Hangkong University, Nanchang 330063, China
2. Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components, Nanchang Hangkong University, Nangchang 330063, China |
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| 中文摘要: |
| 目的 探究搅拌摩擦辅助铆接铝/钢接头界面的结合特征，解决传统铆接力学性能较低的问题。方法 采用搅拌摩擦焊技术实现了对3 mm厚不锈钢板和4 mm厚的铝合金板的搭接点焊，采用OM及SEM对铝/钢接头界面结合情况进行分析，并利用EDS对界面处元素分布进行分析。结果 搅拌头转速1180 r/min、焊接时间120 s、下压量0.2 mm时，铝/钢接头界面结合较好，平均拉剪力达到6519 N，且在铝/钢界面处产生FeAl金属间化合物。受摩擦热作用的影响，位于下板的铝母材晶粒发生长大变粗，铝铆钉与铝板结合紧密，铝铆钉与铝板的结合情况受搅拌头压力的影响更为显著。结论 搅拌摩擦辅助铆接铝/钢异种合金，实现了铆钉与铝板和钢板的有效冶金结合，在铝钢结合界面处存在原子的互扩散现象，且有相应的金属间化合物生成。 |
| 英文摘要: |
| The paper aims to explore the interface characteristics of riveted aluminum/steel joints by friction stir welding and solve the problem of low mechanical performance of traditional riveting. The mating spot welding of 3 mm thick stainless steel plate and 4 mm thick aluminum alloy plate was realized by friction stir welding technology, and the combination of aluminum/steel joint interface was analyzed through OM and SEM, and the distribution of elements at the interface was analyzed with EDS. When the speed of pin tool was 1180 r/min, the welding time was 120 s and the pin tool plunge depth was 0.2 mm, the aluminum/steel joint interface had a better combination and the average tensile shear reached 6519 N, and FeAl intermetallic compounds were produced at the aluminum/steel interface. Influenced by the impact of frictional thermal effect, the aluminum master grain located on the lower plate was enlarged and thickened, the aluminum rivet was tightly combined with the aluminum plate, and the combination of aluminum rivet and aluminum plate was more significantly influenced by the pin tool pressure. The aluminum/steel heteroalloys riveting assisted by friction stir welding realizes effective metallurgical binding of rivets and aluminum plates and steel plates. The phenomenon of atomic mutual diffusion exists at the interface of aluminum-steel binding, and there is corresponding inter-metal compound generation. |
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