Mn与热处理对Al-10Si-5Cu合金组织和性能的影响  

Effects of Mn Addition and Heat Treatment on Microstructure and Properties of Al10Si-5Cu Alloy

作　　者：孙伟 万浩 马海娟[2] 魏超[3] 李玉山[3] 司乃潮[3] Sun Wei;Wan Hao;Ma Haijuan;Wei Chao;Li Yushan;Si Naichao(Jiangsu Longcheng Precision Forging Group Co.,Ltd.,Changzhou 213164;School of Mechonical and Electri-cal Engineering,Taizhou University,Taizhou 225300;School of Materials Science and Engineering,Jiangsu Uni-versity,Zhenjiang 212013)

机构地区：[1]江苏龙城精锻集团有限公司,常州213164 [2]泰州学院机电工程学院,泰州225300 [3]江苏大学材料科学与工程学院,镇江212013

出　　处：《特种铸造及有色合金》2024年第5期675-679,共5页Special Casting & Nonferrous Alloys

基　　金：江苏省高等学校自然科学研究资助项目(21KJB430016);江苏省产学研合作资助项目(BY2022565);江苏省第十六批“六大人才高峰”资助项目(XCL-265);江苏省科协提升高校科协服务能力资助项目;泰州学院高层次人才科研启动基金资助项目(TZXY2017QDJJ014)。

摘　　要：利用金相分析、拉伸试验、显微硬度测试和磨损试验,研究了Mn元素添加对Al-10Si-5Cu合金组织和力学性能的影响,以及不同热处理工艺条件下Mn合金化试样的耐磨性能。结果表明,添加适量的Mn元素可以提高Al-10Si-5Cu合金的综合力学性能。随着Mn含量增加,合金的抗拉强度和显微硬度呈先升高再降低的变化趋势,但伸长率会随着Mn的加入而降低。加入质量分数为0.40%的Mn时合金有最大的抗拉强度和显微硬度(HV),分别为285 MPa和128。热处理可以进一步提高含Mn合金的耐磨性能,在铸态、固溶态和时效态试样中,时效态试样具有最佳的耐磨性能。Effects of Mn addition on microstructure and mechanical properties of Al-10Si-5Cu alloy and wear resis⁃tance of Mn alloyed specimens under different heat treatment conditions were investigated by metallographic analysis,tensile test,microhardness test and wear test.With the increase of Mn addition,the tensile strength and microhardness of alloy is increased firstly and then decreased,while the elongation is decreased.The alloy with 0.40%Mn addition exhibits the desirable tensile strength and microhardness,which are 285 MPa and 128 HV,respectively.Heat treat⁃ment can further improve the wear resistance of Mn-alloyed alloy.Among all the specimens,as-aged specimens pos⁃sesses optimal wear resistance.

关 键 词：AL-SI合金 显微组织 力学性能 磨损性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]