锻压技术

含锶高强建筑铝合金锻压温度优化

英文标题：Optimization of forging temperature of high strength aluminum alloy with strontium for building

作者：刘琳侯公羽

关键词：始锻温度终锻温度高强铝合金 Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr 高温耐磨损性能高温力学性能

分类号：TU599

出版年,卷(期):页码：2018,43(4):22-26

摘要：

采用不同的锻压温度对Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr高强建筑铝合金进行加工，并且在200 ℃环境下对试样进行了摩擦和拉伸试验。结果表明：随始锻温度从360 ℃升高至440 ℃，或终锻温度从280 ℃升高至340 ℃，新型Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr高强铝合金的高温耐磨损性能和高温力学性能均先提高后下降。与360 ℃始锻温度相比，当始锻温度为 420 ℃ 时，磨损体积减小62.1%、抗拉强度提高47.3%、屈服强度提高54.5%；与280 ℃终锻温度相比，当终锻温度为320 ℃时，试样的磨损体积减小53.2%、抗拉强度提高21.2%、屈服强度提高25.1%。始锻温度和终锻温度分别优选为420和320 ℃。

The high strength aluminum alloys Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr for building were processed at different forging temperatures, and the friction and tensile tests were carried out at 200 ℃. The results show that the wear resistance properties and mechanical properties at high temperature of new high strength aluminum alloy Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr increase first and then decrease with the increasing of initial forging temperature from 360 ℃ to 440 ℃ or finial forging temperature from 280 ℃ to 340 ℃. Compared with the initial forging temperature of 360 ℃, when the initial forging temperature is 420 ℃, the wear volume decreases by 62.1%, and the tensile strength increases by 47.3% as well as the yield strength increases by 54.5%. Compared with the finial forging temperature of 280 ℃, when the finial forging temperature is 320 ℃, the wear volume decreases by 53.2%, and the tensile strength increases by 21.2% as well as the yield strength increases by 25.1%. Thus, the optimized initial forging temperature and finial forging temperature are 420 and 320 ℃, respectively.

基金项目：

国家自然科学基金资助项目(50304012)

刘琳（1988-），女，硕士，助教；E-mail：liulin8828@163.com

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