Ti-29Nb-13Ta-4.6Zr高速压制行为及其烧结性能的研究  

High velocity compaction behavior and sintered properties of Ti-29Nb-13Ta-4.6Zr alloy

作　　者：何杰[1] 肖志瑜[1] 杨硕[1] 关航健[1] 张文[1] HE Jie XIAO Zhi-yu YANG Shuo GUAN Hang-jian ZHANG Wen(National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]华南理工大学国家金属材料近净成形工程技术研究中心,广东广州510640

出　　处：《粉末冶金工业》2017年第5期12-17,共6页Powder Metallurgy Industry

基　　金：国家自然科学基金重大仪器项目(51627805);广东省重大科技专项资助项目(2014B010129003);广东省自然科学基金资助项目(2015A030312003);广州市科技计划项目(201604016049)

摘　　要：利用自主研发的机械蓄能式高速压机成形Ti-29Nb-13Ta-4.6Zr粉末并进行真空烧结,研究冲击能量对试样的密度及力学性能的影响。结果表明:随着冲击能量的提高,试样生坯密度提高,在冲击能量为1 805 J时,获得的最大生坯密度达到5.63 g/cm^3(相对密度94.1%);径向弹性后效随着冲击能量增加而增加;经真空1 250℃烧结后,烧结坯的密度随着冲击能量的增加而增加,但烧结坯的体积发生了膨胀,最大烧结密度为5.53 g/cm^3(相对密度为92.5%);真空烧结2.0 h后,钛合金的抗拉强度和硬度达到最大值,分别为629.8 MPa和324.5 HV。The Ti-29 Nb-13 Ta-4.6 Zr powder was compacted with a self-developed high velocity compaction machine. The effect of impact energy on density as well as mechanical properties was investigated. The results reveal that the green density increases with increasing impact energy,the green density reaches a maximum of 5.63 g/cm^3（relative density of 94.1%）with impact energy of 1 805 J. The radial spring back of the samples increase with increasing impact energy. After sintered in vacuum at 1 250 ℃,the sintered density increases with the increase of impact energy while the volume of the sintered compacts expand and the sintered compacts obtain the maximum density of 5.53 g/cm^3（relative density of 92.5%）. After sintered for 2.0 h in vacuum,the sintered compacts obtain the highest tensile strength of 629.8 MPa and the highest hardness of 324.5 HV.

关 键 词：Ti-29Nb-13Ta-4.6Zr 高速压制 冲击能量 密度 力学性能 

分 类 号：TF125.22[冶金工程—粉末冶金]