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

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)

机构地区：[1]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

出　　处：《铸造技术》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)。

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.

关 键 词：铸造铝合金 高温拉伸性能 稳定化处理 耐热性能 

分 类 号：TG292[金属学及工艺—铸造] TG113