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Al-Si-Mg-Cu铸造铝合金高温拉伸性能研究
Study on High Temperature Tensile Properties of Al-Si-Mg-Cu Cast Aluminum Alloy
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- DOI:
- 作者:
- 洪润洲，范学燚，左 强，张 喆
HONG Runzhou, FAN Xueyi, ZUO Qiang, ZHANG Zhe
- 作者单位:
- 中国航发北京航空材料研究院 铸造铝/镁合金研究与工程技术中心，北京 100095
Engineering Research Center of Cast Aluminium and Magnesium Alloys, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
- 关键词:
- 铸造铝合金；高温拉伸性能；稳定化处理；耐热性能
cast aluminum alloy; high temperature tensile property; stabilization treatment; heat resistant property
- 摘要:
- 研究了一种 Al-Si-Mg-Cu 铸造铝合金分别在 200、250 ℃的瞬时拉伸性能以及经 200 ℃和 250 ℃稳定化处
理不同时间后的高温瞬时拉伸性能，并和已有标准中常用的 Al-Si 系耐热铸造铝合金的高温拉伸性能进行了对比。结果
表明，随着测试温度的升高，Al-Si-Mg-Cu 铸造铝合金的瞬时拉伸性能呈下降趋势；随着稳定化处理温度的升高和时间
的延长，强度都呈下降趋势， 200 ℃时伸长率基本不变，250 ℃时伸长率显著升高。 200 ℃时，Al-Si-Mg-Cu 铸造铝合金表
现出良好的拉伸性能，明显优于其他常用 Al-Si 系耐热铸造铝合金。
The instantaneous tensile properties of an Al-Si-Mg-Cu cast aluminum alloy at 200 ℃ and 250 ℃ respectively were studied.And the instantaneous tensile properties at high temperature after being stabilized at 200 ℃ and 250 ℃ for different time, and the high temperature tensile properties of Al-Si series heat-resistant cast aluminum alloy commonly used in existing standards were compared.The results show that the instantaneous tensile properties of Al-Si-Mg-Cu cast aluminum alloy decrease with the increase of test temperature. With the increase of stabilization temperature and time, the strength decreases, and the elongation remains unchanged at 200 ℃, but increases significantly at 250 ℃. At 200 ℃, Al-Si-Mg-Cu cast aluminum alloy shows good tensile properties, which is obviously better than other commonly used Al-Si heat resistant cast aluminum alloys.