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.
作者
洪润洲
范学燚
左强
张喆
HONG Runzhou;FAN Xueyi;ZUO Qiang;ZHANG Zhe(Engineering Research Center of Cast Aluminium and Magnesium Alloys,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《铸造技术》
CAS
2022年第7期541-545,共5页
Foundry Technology
基金
航发集团创新基金项目“高强耐热铸造铝合金研究”(CXPT-2018-007)。
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
