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
原警舒 1章寒 1王楚文 2王兆乾 2孙德建 1高阳1
作者信息
- 1. 郑州航空工业管理学院材料学院,河南郑州 450046;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
- 2. 郑州航空工业管理学院材料学院,河南郑州 450046
- 折叠
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铁合金.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a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.
Abstract
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 micro-structure 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 equiaxed α phase and intergranular β phase.With the increase of hot pressing temperature,the grain coarsens,and the volume fraction of the α phase decreases.When HP tempera-ture is 930 ℃,the tensile properties of the alloy sample are the best at room temperature,and the maximum ten-sile 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Key words
TC4/hot pressing sintering/sintering temperature/microstructure/tensile property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据