Effects of conform continuous extrusion and heat treatment on the microstructure and mechanical properties of Al–13Si–7.5Cu–1Mg alloy  

作　　者：Gao-yong Lin Xin Tan Di Feng Jing-li Wang Yu-xia Lei 

机构地区：[1]School of Materials Science and Engineering,Central South University,Changsha 410083,China [2]Key Lab of Nonferrous Materials,Ministry of Education,Central South University,Changsha 410083,China [3]Department of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2019年第8期1013-1019,共7页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.51274245)

摘　　要：The effects of conform continuous extrusion and subsequent heat treatment on the mechanical and wear-resistance properties of high-alloying Al–13Si–7.5Cu–1Mg alloy were investigated.The microstructures of alloys before and after conform processing and aging were compared by transmission electron microscopy and scanning electron microscopy,respectively.The results reveal that the primary phases were broken and refined by intense shear deformation during conform processing.After the conform-prepared Al–13Si–7.5Cu–1Mg alloy was subjected to solid-solution treatment at 494℃for 1.5 h and aging at 180℃for 4 h,its hardness improved from HBS 115.8 to HBS 152.5 and its ultimate tensile strength increased from 112.6 to 486.8 MPa.Its wear resistance was also enhanced.The factors leading to the enhanced strength,hardness,and wear resistance of the alloy were discussed in detail.The effects of conform continuous extrusion and subsequent heat treatment on the mechanical and wear-resistance properties of high-alloying Al–13Si–7.5Cu–1Mg alloy were investigated.The microstructures of alloys before and after conform processing and aging were compared by transmission electron microscopy and scanning electron microscopy, respectively.The results reveal that the primary phases were broken and refined by intense shear deformation during conform processing.After the conform-prepared Al–13Si–7.5Cu–1Mg alloy was subjected to solid-solution treatment at 494℃ for 1.5 h and aging at 180℃ for 4 h, its hardness improved from HBS 115.8 to HBS 152.5 and its ultimate tensile strength increased from 112.6 to 486.8 MPa.Its wear resistance was also enhanced.The factors leading to the enhanced strength, hardness, and wear resistance of the alloy were discussed in detail.

关 键 词：Al-13Si-7.5Cu-1Mg alloy CONFORM CONTINUOUS EXTRUSION heat treatment wear resistance 

分 类 号：TF[冶金工程]