在纵向振动下增强米格合金7075合金的微观结构和机械性能
Teodor Machedon-Pisu1, Mihai Machedon-Pisu2
1Department of Materials Engineering and Welding, Transilvania University of Brașov, B-dul Eroilor nr. 29, 500036 Brașov, Romania.
Materials (Basel, Switzerland)
|September 27, 2025
概括
合金Al 7075与MIG在振动下接可以通过减少裂和孔隙来提高接质量. 这种具有成本效益的方法提高了硬度和抗拉强度,使其适用于汽车和飞机工业.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 金工业是金工业的一个方面.
背景情况:
- 高强度合金Al 7075对于汽车,飞机和建筑行业的轻质结构至关重要.
- 合金7075的接能力差导致接接头的裂纹和低于最佳的机械性能.
- 现有的接方法通常需要复杂的设备和接后的热处理.
研究的目的:
- 为了研究MIG接在纵向振动下对Al 7075的接能力的影响,使用Al 4043填充剂.
- 为了提高Al 7075接的机械和结构性能,避免接后的处理.
- 为Al 7075.5建立一个具有成本效益和改进的接程序.
主要方法:
- 使用金属惰性气体 (MIG) 用Al 4043填充材料接Al 7075.
- 在接过程中以50 Hz的频率施加纵向强制振动.
- 将接接头的性能 (硬度,抗拉强度,微观结构) 与没有振动进行比较.
主要成果:
- 振动接显著降低了热裂的风险,并消除了带结构中的多孔性.
- 在振动下,接的硬度提高了8.7%至12.5%.
- 与非振动接相比,振动接板的拉伸强度增加了12%至15.5%.与非振动接相比,振动接板的拉伸强度增加了12%至15.5%.
- 在受热影响区 (HAZ) 中降雨的增强有助于改善物质.
结论:
- 在纵向振动下MIG接Al 7075是一种可行的方法,可以提高接质量和机械性能.
- 振动接技术提供了一个具有成本效益的替代方案,在不需要复杂的接后处理的情况下增强性能.
- 这种方法为要求高的工业应用提供了高级Al 7075接的途径.
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