多向镦拔对医用TC4钛合金组织和力学性能的影响  

Effect of Multi-directional Forging on Microstructure and Mechanical Properties of Biomedical TC4 Alloy

作　　者：樊亚军 曹继敏 王卫民 陈志宏 

机构地区：[1]西安赛特金属材料开发有限公司,陕西西安710021

出　　处：《热加工工艺》2010年第19期104-106,110,共4页Hot Working Technology

基　　金：国家科技型中小企业技术创新基金资助项目(08C26116111559)

摘　　要：通过实验对TC4方坯进行多向镦拔,对制备的径锻棒材进行组织和力学性能测试分析。结果表明:多向镦拔能有效细化TC4合金组织晶粒、提高力学性能。随镦拔变形量及次数的增加,α相晶粒逐渐细小、等轴化,2火次75%变形量多向镦拔可获得α相晶粒为5μm;3火次75%变形量多向镦拔变形下,准65mm径锻棒的屈服强度及抗拉强度分别高达940MPa和1015MPa,伸长率为17%。Multi-directional forging was applied to prepare TC4 alloy bar.The microstructure and mechanical properties of the TC4 alloy bar was tested.The results show that multi-directional forging can efficiently refine the grain size of the alloy and improve the mechanical properties.The finer and more equiaxed primary α is realized with the increase of deformation amount and times of multi-directional forging.And α grain size of 5 μm is obtained under 75% strain and 2 times heating.The TC4 alloy bar with φ65 mm exhibits yield stength of 940 MPa,tensile strength of 1015 MPa and elongation of 17% under 75% strain and 3 times heating.

关 键 词：医用TC4钛合金 多向镦拔 微观组织 力学性能 

分 类 号：TG316[金属学及工艺—金属压力加工]