热压温度对TC4钛合金微观组织和拉伸性能的影响  

Effect of hot pressing temperature on microstructure and tensile properties of TC4 titanium alloy

作　　者：原警舒 章寒 王楚文 王兆乾 孙德建 高阳 YUAN Jingshu;ZHANG Han;WANG Chuwen;WANG Zhaoqian;SUN Dejian;GAO Yang(School of Materials,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;Henan Key Laboratory of Aeronautical Materials and Application Technology,Zhengzhou University of Aeronautics,Zhengzhou 450046,China)

机构地区：[1]郑州航空工业管理学院材料学院,河南郑州450046 [2]郑州航空工业管理学院河南省航空材料与应用技术重点实验室,河南郑州450046

出　　处：《粉末冶金工业》2024年第5期89-94,110,共7页Powder Metallurgy Industry

基　　金：河南省科技研发项目(202102210013);郑州航院研究生教育创新计划基金项目(2023CX76)

摘　　要：采用热压(hot pressing,HP)烧结技术,制备了高致密度、细晶粒、拉伸性能优异的TC4钛合金。借助X射线衍射(XRD)、扫描电镜(SEM)、拉伸实验等测试手段,研究了热压温度(880、930、980℃)对TC4钛合金微观结构和室温拉伸性能的影响。研究结果表明:热压态样品主要由等轴α相和晶间β相组成;随热压温度升高,晶粒逐渐粗化,α相体积分数降低。HP温度为930℃时,合金样品的室温拉伸性能最佳,其抗拉强度最大值和断后伸长率分别为934 MPa和26.3%,优于相关文献报道的铸造态和热等静压态TC4钛合金。TC4 titanium alloys with high density,fine grain and excellent tensile properties were prepared by hot pressing(HP)sintering technique.The effects of HP sintering temperatures(880,930,980℃)on the microstructure and tensile properties of TC4 titanium alloy samples were investigated by means of X-ray diffraction(XRD),scanning electron microscopy(SEM),room temperature tensile tests,etc.The results show that the HPed TC4 samples consist mainly of equiaxedαphase and intergranularβphase.With the increase of hot pressing temperature,the grain coarsens,and the volume fraction of theαphase decreases.When HP temperature is 930℃,the tensile properties of the alloy sample are the best at room temperature,and the maximum tensile strength and elongation after fracture are 934 MPa and 26.3%,respectively,which is better than the cast and hot isostatic pressing TC4 titanium alloys reported in the relevant literature.

关 键 词：TC4 热压烧结 烧结温度 微观组织 拉伸性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]