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工艺技术

基于高通量的原位制备网状结构TiC增强TC4复合材料的组织与性能

  • 杜康鸿 ,
  • 柳中强 ,
  • 张建涛 ,
  • 温利平 ,
  • 肖志瑜
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  • 华南理工大学 国家金属近净成形工程技术研究中心,广州 510640

收稿日期: 2021-08-17

  修回日期: 2021-10-26

  网络出版日期: 2021-10-21

基金资助

广东省重大科技攻关项目(2019B010942001); 国家自然科学基金资助项目(51627805)

Microstructure and properties of high-throughput in situ network structure TiC reinforced TC4 composite materials

  • DU Kanghong ,
  • LIU Zhongqiang ,
  • ZHANG Jiantao ,
  • WEN Liping ,
  • XIAO Zhiyu
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  • National Engineering Research of Net-Shape Forming for Metallic Material, South China University of Technology, Guangzhou 510640, China

Received date: 2021-08-17

  Revised date: 2021-10-26

  Online published: 2021-10-21

摘要

以不同粒度的TC4合金粉末为基体材料,以VC作为碳源,采用高通量热压烧结工艺,原位制备具有不同网状结构尺寸和不同TiC体积分数(分别为2%、4%和6%)的TiC/TC4钛基复合材料,研究TiC含量和TC4粉末粒度对复合材料组织与性能的影响。结果表明,TiC/TC4复合材料中的TiC增强颗粒呈网状分布。与TC4合金相比,TiC/TC4复合材料的组织明显细化。随TiC含量增加,TiC网状结构的厚度增大,材料的抗拉强度与伸长率先升高后下降,TiC含量为2%的复合材料综合性能最优。随TC4粉末粒度减小,TiC/TC4复合材料中的基体组织逐渐细化,基体的连通性提高,材料抗拉强度与伸长率同时提高。采用粒度为40~80 μm的TC4合金粉末为原料制备的2%TiC/TC4复合材料,网状结构尺寸小,综合性能最优,屈服强度、抗拉强度和伸长率分别为946 MPa、1058 MPa和18.1%,较TC4合金分别提高29.6%、31.6%和118.1%。

本文引用格式

杜康鸿 , 柳中强 , 张建涛 , 温利平 , 肖志瑜 . 基于高通量的原位制备网状结构TiC增强TC4复合材料的组织与性能[J]. 粉末冶金材料科学与工程, 2022 , 27(1) : 56 -65 . DOI: 10.19976/j.cnki.43-1448/TF.2021070

Abstract

Using TC4 alloy powders with different particle sizes as the matrix material, using VC as the carbon source, using high throughput hot press sintering process, TiC/TC4 composites were prepared with different network structure sizes and TiC volume fractions (2%, 4%, 6%). The effect of TiC content and TC4 powder particle sizes on the microstructure and properties of composite materials were studied. The results show that the TiC reinforcement particles in TiC/TC4 titanium matrix composites are distributed in a network. Compared with TC4 alloy, the microstructure of TiC/TC4 composite materials are significantly refined. As the TiC content increases, the thickness of the TiC network layer increases, and the tensile strength and elongation of the material first increase and then decrease. The material with 2%TiC has the best overall performance. As the particle size of TC4 decreases, the microstructure of the TiC/TC4 composite is gradually refined, the connectivity of the matrix increases, and the tensile strength and elongation of the material increase at the same time. 2%TiC/TC4 composite material prepared by TC4 alloy powders with a particle size of 40-80 μm has a small network structure and the best overall performance. The yield strength, tensile strength and elongation reach 946 MPa, 1058 MPa and 18.1%, respectively, which are 29.6%, 31.6%, and 118.1% higher than TC4 alloy.

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