固溶温度对Al-Mg-Si-Sr新型汽车铝合金高温性能的影响
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摘要
采用不同的固溶温度对Al-Mg-Si-Sr新型铝合金进行了固溶热处理,并进行了合金350℃高温拉伸性能和高温磨损性能的测试与分析。结果表明:随固溶温度从440℃逐步增加到540℃时,合金的高温拉伸性能和高温磨损性能均先提高后下降;合金的固溶温度优选为520℃。与440℃固溶相比,当采用520℃固溶时,Al-Mg-Si-Sr新型铝合金的高温抗拉强度提高了52%,高温屈服强度提高了79%,高温磨损体积减小了58%。
The solid solution treatment of the new aluminum alloyAl-Mg-Si-Sr for automobile were carried out by using different solid solution temperatures,and the tensile properties and wear resistance of the alloy at high temperature of 350 ℃were tested and analyzed. The results show that, with solid solution temperature increasing from 440 ℃ to 540 ℃, both the tensile properties and wear resistance of the alloy at high temperature firstly increase and then decrease. The optimized solid solution temperature of the alloy is 520 ℃. Compared with that under the solid solution temperature of 440 ℃, the high temperaturetensile strength and yield strength of the alloy under the solid solution temperature of 520 ℃ increase by 52% and 79%, respectively, while the wear volume decreases by 58%.
The solid solution treatment of the new aluminum alloyAl-Mg-Si-Sr for automobile were carried out by using different solid solution temperatures,and the tensile properties and wear resistance of the alloy at high temperature of 350 ℃were tested and analyzed. The results show that, with solid solution temperature increasing from 440 ℃ to 540 ℃, both the tensile properties and wear resistance of the alloy at high temperature firstly increase and then decrease. The optimized solid solution temperature of the alloy is 520 ℃. Compared with that under the solid solution temperature of 440 ℃, the high temperaturetensile strength and yield strength of the alloy under the solid solution temperature of 520 ℃ increase by 52% and 79%, respectively, while the wear volume decreases by 58%.
引文
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[3]王冠,李远波,郭钟宁,等.汽车散热器新型铝合金钎焊接头腐蚀行为的分析[J].焊接学报,2011,32(6):25-28.
[4]马春江,陈玖新,葛素静,等.挤压铸造重载汽车用铝合金车轮的组织及性能[J].特种铸造及有色合金,2014,34(10):1063-1065.
[5]丁俭,范玮,赵乃勤,等.汽车铝合金轮毂低压铸造工艺的有限元模拟及优化[J].机械工程材料,2016,40(4):93-98.
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[7]黄旭.汽车用5182铝合金双辊连续铸轧温度场模拟[J].制造业自动化,2015,37(12):101-103.
[8]孙珏,许善新,汤杰,等.汽车铝合金副车架挤压铸造工艺设计和产品开发[J].铸造,2015,64(1):17-21.
[9]王亮亮.固溶处理对汽车用7075铝合金微观组织和力学性能的影响[J].山东农业大学学报:自然科学版,2014,59(5):717-719.
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