固溶时效对Ti-6Al-4V-1.5Mn合金组织与性能的影响  

Effects of solid solution and aging on microstructure and properties of Ti-6Al-4V-1.5Mn alloy

作　　者：刘冀尧 王文焱[1,2] 谢敬佩 赵轩玮[3] 李长银 张玉林 胡玉水 Liu Jiyao;Wang Wenyan;Xie Jingpei;Zhao Xuanwei;Li Changyin;Zhang Yulin;Hu Yushui(College of Material Science and Engineering Henan University of Science and Technology,Luoyang Henan 471003,China;Collaborative Innovation Center of Nonferrous Metals Henan Province,Luoyang Henan 471023,China;Zhengzhou Research Institute of Mechanical Engineering,Zhengzhou Henan 451000 China;Fnjian San An steel Co.,Ltd.,Quanzhou Fujian 362214,China;Power Construction Corporation of Eleventh Engineering,Zhengzhou Henan 450000,6.SHZR Machinery Equipment Co.,Ltd.,Shanghai 201801,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023 [3]郑州机械研究所,河南郑州451000 [4]福建三安钢铁有限公司,福建泉州362214 [5]电建集团第十一工程局,河南郑州450000 [6]上海召瑞机械设备有限公司,上海201801

出　　处：《金属热处理》2018年第9期106-111,共6页Heat Treatment of Metals

基　　金：河南省重大科技专项(102105000007)

摘　　要：采用冷等静压法和粉末冶金法制备Ti-6Al-4V-1.5Mn钛合金,并利用光学显微镜、XRD、SEM、TEM和拉伸试验机等手段对固溶时效处理后合金的组织和力学性能进行观察和分析。结果表明：试验合金经950℃×40 min固溶处理后,合金基体的组织主要为板条状的α相和细小的α＇相。随着固溶温度的增加,试验合金的抗拉强度和伸长率均增加,当在950℃固溶40 min时,试验合金的具有最佳的力学性能。当试验合金经950℃×40 min固溶处理后,随后在不同的温度下进行保温6 h时效处理。随着时效温度升高,试验合金的抗拉强度和伸长率均减少,其中试验合金在460℃时效6 h时具有最佳的力学性能,并对其拉伸断口的组织分析可知,韧窝的数量最多。最后由TEM和XRD分析了最佳固溶时效工艺处理后的样品,基体组织主要为α-Ti和β-Ti,并在XRD图谱中存在较为明显的衍射峰。Ti-6 Al-4 V-1. 5 Mn alloy was prepared by powder metallurgy and cold isostatic pressing method. Microstructure and mechanical properties of the alloy after solution treatment and aging were studied by the means of optical microscope,XRD,SEM,TEM and tensile testing machine. The results show that matrix microstructure of the tested alloy mainly consists of lath-shaped α phase and fine α＇ phase.Tensile strength and elongation of the tested alloy increase with the increasing of solution temperature,and mechanical properties of the tested alloy are the best at 950 ℃ for 40 min. After solution treating at 950 ℃ for 40 min,the tested alloy is aged at different temperatures for 6 h.With the increasing of aging temperature,tensile strength and elongation of the tested alloy decrease. The mechanical properties of the tested alloy are the best when aging at 460 ℃ for 6 h. The tensile fracture analyzing results reveal that the amount of dimple is the maximum.Finally,the samples treated by the best solid solution and aging are analyzed by TEM and XRD,the matrix microstructure are mainly α-Ti and β-Ti,which is verified by the obvious diffraction peak in XRD patterns

关 键 词：Ti-6Al-4V-1.5Mn合金 力学性能 显微组织 固溶时效 

分 类 号：TG146.23[一般工业技术—材料科学与工程]