固溶温度对Al-Mg-Si-Sr新型汽车铝合金高温性能的影响.pdfVIP

HotWorkingTechnology2019,Vol.48,No.14

固溶温度对Al-Mg-Si-Sr新型汽车铝合金

局温性能的影响

姬虹

(河南职业技术学院，河南郑州450046)

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°C高温拉伸性能和

髙温磨损性能的测试与分析。结果表明：随固溶温度从440°C逐步增加到540°C时，合金的高温拉伸性能和高温磨损性

能均先提髙后下降；合金的固溶温度优选为520°C。与440°C固溶相比，当采用520°C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%，髙温磨损体积减小了58%。

关键词：固溶温度;Al-Mg-Si-Sr铝合金；高温拉伸性能；髙温耐磨损性能

DOI:10.14158/j.cnki.1001-3814.2019.14.035

中图分类号：TG156.94文献标识码：A文章编号：1001-3814(2019)14-0140-03

EffectofSolidSolutionTemperatureonHighTemperatureProperties

ofAl-Mg-Si-SrNewAluminumAlloyforAutomobile

JIHong

(HenanPolytechnicCollege,Zhengzhou450046,China)

AbstractThesolidsolutiontreatmentofthen：ewaluminumalloyAl-Mg-Si-Srforautomobilewerecarriedoutbyusing

differentsolidsolutiontemperatures,andthetensilepropertiesandwearresistanceofthealloyathightemperatureof350°C

weretestedandanalyzed.Theresultsshowthat,withsolidsolutiontemperatureincreasingfrom440°Cto540°C,boththe

tensilepropertiesandwearresistanceofthealloyathightemperaturefirstlyincreaseandthendecrease.Theoptimizedsolid

solutiontemperatureofthealloyis5208C.Comparedwiththatunderthesolidsolutiontemperatureof440°C,thehigh

temperaturetensilestrengthandyieldstrengthofthealloyunderthesolidsolutiontemperatureof520°Cincreaseby52