摘要
通过3次真空自耗电弧熔炼、自由锻+旋锻的方式制备了不同TiB+TiC含量的颗粒增强钛基复合材料,研究了TiB+TiC含量对锻态钛基复合材料组织与力学性能的影响。结果表明,添加的B4C在基体中完全反应,TiC为唯一碳化物,TiB为唯一硼化物。经锻造后,钛基复合材料横向组织由球状、片状α相和包围在四周的β相组成,短棒状和块状增强相离散分布,而纵向组织由沿着流变方向被拉长的α相和β相组成,增强相沿着流变方向排列分布。当TiB+TiC含量为5vol%时,钛基复合材料表现出优异的综合性能,抗拉强度达到1291 MPa,延伸率为8.5%,磨损体积较相同工艺制备的TC4钛合金减少25%。当TiB+TiC含量增加到10vol%时,粗大的TiB增强相和微孔缺陷数量大幅增加,钛基复合材料的塑性和耐磨性被削弱。
The titanium matrix composites were prepared by vacuum consumable arc melting,free forging+rotary forging,and the effect of TiB+TiC content on the microstructure and mechanical properties of forged titanium matrix composite materials were studied.The results indicate that the added B4C reacts completely within the matrix,resulting in TiC as the sole carbide and TiB as the sole boride.After forging,the transverse microstructure of the composite exhibits spherical and flakyαphase which surrounded byβphase,with discretely distributed short rod-like and blocky reinforcing phases.The longitudinal structure consists of elongatedαphase andβphase along the rheological direction,with the enhanced phase distributed in the same direction.When the content of TiB+TiC is 5vol%,the titanium matrix composite showing excellent comprehensive properties,with tensile strength of 1291 MPa and elongation of 8.5%,and the wear volume is reduced by 25%compared with that of TC4 titanium alloy prepared by the same process.If the content of TiB+TiC is further increased,the number of TiB reinforcing phase and microporous defects in the composite is greatly increased,which weakens the plasticity and wear resistance of the composite.
作者
曹起川
王慧明
吕晓仁
柏春光
杜菲菲
李兴海
郭映福
Cao Qichuan;Wang Huiming;Lv Xiaoren;Bai Chunguang;Du Feifei;Li Xinghai;Guo Yingfu(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Shi Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;QingHai Salt Lake Industry Co.,Ltd.,Geermu 816000,China)
出处
《钛工业进展》
CAS
2024年第1期15-24,共10页
Titanium Industry Progress
关键词
TC4钛合金
钛基复合材料
微观组织
拉伸性能
摩擦磨损
TC4 titanium alloy
titanium matrix composites
microstructure
tensile property
friction and wear
