淬火水温对2219铝合金锻环组织和力学性能的影响  

Effect of Quenching Water Temperature on Microstructure and Mechanical Property of 2219 Aluminum Alloy Forging Ring

作　　者：马云龙 陈送义 王习锋 陈康华 MA Yunlong;CHEN Songyi;WANG Xifeng;CHEN Kanghua(Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China;Light Alloy Research Institute,Central South University,Changsha 410083,China;Collaborative Innovation Center of Advanced Nonferrous Structural Materialsand Manufacturing,Central South University,Changsha 410083,China)

机构地区：[1]北京宇航系统工程研究所,北京100076 [2]中南大学轻合金研究院,湖南长沙410083 [3]中南大学有色金属先进结构材料与制造协同创新中心,湖南长沙410083

出　　处：《湖南大学学报（自然科学版）》2020年第8期118-123,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金委员会—中国航天科技集团公司航天先进制造技术研究联合基金资助项目(U1637601)。

摘　　要：采用室温拉伸测试、金相显微镜、扫描电镜以及透射电镜等测试分析方法,研究淬火水温(20~80℃)对2219铝合金锻环组织和拉伸性能的影响.研究结果表明:随着淬火水温提高,锻环的抗拉强度、屈服强度和延伸率先升高后降低.当淬火水温超过60℃时,锻环延伸率各向异性倾向显著增加,其主要原因是形成粗大晶界析出相.当淬火水温为40℃时,锻环具有较好的强度和延伸率,其轴向抗拉强度、屈服强度和延伸率分别为418 MPa、300 MPa和9.3%,径向抗拉强度、屈服强度和延伸率分别为420 MPa、300 MPa和9.8%,切向抗拉强度、屈服强度和延伸率分别为447 MPa、329 MPa和12.6%.The effects of quenching water temperature(20~80℃)on the microstructure and mechanical property of 2219 Al alloy forging ring were studied by room temperature tensile test,optical microscope(OM),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The results showed that the tensile strength and yield strength first increased and then decreased with the increase of quenching temperature.The elongation anisotropy index of 2219 Al alloy ring forging was significantly increased when the quenching water temperature exceeds 60℃due to the formation of coarse grain boundary precipitates.The high strength and elongation of 2219 Al alloy ring forging was obtained under the quenching water temperature at 40℃.The axial tensile strength,yield strength and elongation were 418 MPa,300 MPa and 9.3%,respectively.The radial tensile strength,yield strength and elongation were 420 MPa,300 MPa and 9.8%,respectively.The tangential tensile strength,yield strength and elongation were 447 MPa,329 MPa and 12.6%,respectively.

关 键 词：铝合金 淬火水温 环锻件 显微组织 机械性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]