固溶温度对粉末触变锻造制备2024铝合金组织和力学性能的影响  

Influence of solution temperature on microstructure and mechanical properties of 2024 aluminum alloy produced by powder thixo-forging

作　　者：王张军 陈体军[1,2] Wang Zhangjun;Chen Tijun(College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《锻压技术》2018年第10期30-35,共6页Forging & Stamping Technology

基　　金：甘肃省高校基本科研经费资助项目(G2014-07);高校新世纪优秀人才资助项目(NCET-10-0023)

摘　　要：采用一种新型的粉末触变锻造技术制备了2024铝合金,采用光学显微镜（OM）、扫描电镜（SEM）和X射线衍射（XRD）等分析手段,研究了固溶温度对粉末触变锻造2024铝合金和金属型铸造2024铝合金显微组织和力学性能的影响。研究表明：随着固溶温度的升高,粉末触变锻造2024铝合金的抗拉强度、屈服强度、伸长率都逐渐增加,在490℃×3 h时,综合力学性能达到最佳,其抗拉强度、屈服强度和伸长率分别为350 MPa, 270 MPa和17. 5%;金属型铸造2024铝合金最佳固溶工艺为490℃×12 h,其抗拉强度、屈服强度和伸长率分别达到320 MPa,245 MPa和15. 2%;相比金属型铸造2024铝合金,粉末触变锻造2024铝合金的抗拉强度、屈服强度和伸长率分别提高了9. 4%,10.2%和15.1%。2024 aluminum alloy was produced by a new type of powder thixo-forging method,and the influences of solution temperature on microstructure and mechanical properties of powder thixo-forging and casting 2024 aluminum alloys were studied by optical microscope （OM）,scanning electron microscope （SEM） and X-ray diffraction （XRD）. The results show that the tensile strength,yield strength and elongation rate of powder thixo-forging 2024 aluminum alloy increase gradually with the increasing of solution temperature,and the comprehensive mechanical properties achieve the best at 490 ℃ × 3 h with the tensile strength of 350 MPa,the yield stress of 270 MPa and the elongation rate of 17. 5%. However,the best solution technology of casting 2024 aluminum alloy is at 490 ℃ × 12 h,and its tensile strength,yield strength and elongation rate are 320 MPa,245 MPa,15. 2%,respectively. Comparing with casting 2024 aluminum alloy,the tensile strength,yield strength,and elongation rate of powder thixo-forging 2024 aluminum alloy are increased by 9. 4%,10. 2%,15. 1%,respectively.

关 键 词：粉末触变锻造 2024铝合金 固溶温度 显微组织 力学性能 

分 类 号：TG319[金属学及工艺—金属压力加工]