通过电阻元件接接的/钢接头的性能和界面微结构
Nannan Wang1,2,3, Jinpeng Li1,2, Wenjie Wu1
1Guanghan Campus, Civil Aviation Flight University of China, Guanghan 618307, China.
Materials (Basel, Switzerland)
|February 24, 2024
概括
这项研究优化了使用钢钉的合金和钢的电阻元件接. 通过控制接电流和时间,并对温度和反应层进行详细分析,获得了7.93 kN的最大联合强度.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
- 接技术 接技术
背景情况:
- 结合不相似的材料,如合金和钢材,由于它们的性能差异存在重大挑战.
- 用钢钉接电阻元件提供了一个潜在的解决方案,用于在A6061合金和Q235钢之间创建坚固的接头.
研究的目的:
- 研究接参数对电阻元件接产生的不相似钢接头的机械性能和界面特性的影响.
- 在接过程中分析接口的温度分布和微观结构演变.
主要方法:
- 使用ABAQUS软件进行数值模拟,以计算电阻元件接期间的温度场.
- 进行了界面微观结构观察和拉力剪切负荷测试,以评估关节性能.
- 多种接电流和接时间,以确定最佳的过程参数.
主要成果:
- 观察到,杆杆和Q235钢板之间形成了颗粒.
- 接头的拉力切削负荷最初随着接电流和时间的增加而增加,在14 kA和300 ms时达到7.93 kN的最大值.
- 更高的温度和更长的高温持续时间记录在更接近下方钢板的位置,特别是在钉 - 上方板 - 下方板交叉点 (1237 °C, 392 ms).
- 一个更厚的反应层 (大约2.0微米) 在钉-上层板-下层板交叉点形成,与接近下层板相关联.
结论:
- 优化的接参数 (14 kA,300 ms) 在不相似的-钢接头中产生最大拉力切割强度.
- 温度分布和反应层厚度是影响和钢的电阻元件接中关节完整性的关键因素.
- 了解界面现象是提高不同材料连接的性能的关键.
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