Effects of Hot-pressed Sintering Temperature on Microstructure and Micro-hardness of Solid State Recycled TC4 Titanium Alloy

Wei Xiaohua; Wang Ye; Li Xuewen; Ji Zesheng; Yuan Yu

doi:10.15980/j.tzzz.2020.05.002

Views : 0 下载量: 116 CSCD: 0

Export
Share
Collection
Album

Effects of Hot-pressed Sintering Temperature on Microstructure and Micro-hardness of Solid State Recycled TC4 Titanium Alloy
Vol. 40, Issue 5, Pages: 470-473(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.05.002

扫描看全文

[1]魏小华,王晔,李学问,吉泽升,袁宇.热压烧结温度对固相再生TC4钛合金微观组织及硬度影响[J].特种铸造及有色合金,2020,40(05):470-473.

Wei Xiaohua, Wang Ye, Li Xuewen, et al. Effects of Hot-pressed Sintering Temperature on Microstructure and Micro-hardness of Solid State Recycled TC4 Titanium Alloy. [J]. Special Casting & Nonferrous Alloys 40(5):470-473(2020)
[1]魏小华,王晔,李学问,吉泽升,袁宇.热压烧结温度对固相再生TC4钛合金微观组织及硬度影响[J].特种铸造及有色合金,2020,40(05):470-473. DOI： 10.15980/j.tzzz.2020.05.002.

Wei Xiaohua, Wang Ye, Li Xuewen, et al. Effects of Hot-pressed Sintering Temperature on Microstructure and Micro-hardness of Solid State Recycled TC4 Titanium Alloy. [J]. Special Casting & Nonferrous Alloys 40(5):470-473(2020) DOI： 10.15980/j.tzzz.2020.05.002.

摘要

通过热压烧结法对TC4钛合金废屑进行固相再生

并对固相再生TC4钛合金的微观组织和硬度进行了分析测试

研究了热压烧结温度对固相再生TC4钛合金微观组织和硬度的影响。结果表明

在给定的热压烧结工艺条件下

TC4废屑结合良好

且没有产生新的亚稳相

再生坯料的相组成与母材一致

仍为典型的α+β组织。烧结温度升高

会使再生合金微观组织中的β-Ti晶粒长大

晶界模糊并导致部分针状的α-Ti以团束的形式析出

显微组织中的β-Ti相含量提高

针状的α-Ti组织则明显减少

烧结温度为1 200℃时

合金组织由网篮组织转变为魏氏组织。再生合金的显微硬度值也随着烧结温度的升高而提高。

Abstract

The solid state recycled process of TC4 titanium alloy chips was performed by hot pressing sintering method

and the microstructure and hardness tests of the recycled TC4 titanium alloy was analyzed to understand effects of hot pressing sintering temperature. The results reveal that under the given condition of hot pressing sintering process

the chips of TC4 alloy present a satisfied bonding with absence of any new phase

and the phase composition of recycled billet is consistent with the parent metal

which is still a typical α+β type structure. With the increase of sintering temperature

the growth of β-Ti grains in the microstructure of the recycled TC4 alloy can be observed with the blurring of grain boundary and the precipitation of some acicular α-Ti in form of clusters. The proportion of beta Ti phase in the microstructure will be increased

while the acicular α-Ti structure will be decreased significantly. When the sintering temperature is 1 200 ℃

the microstructure of the alloy is changed from basket weave structure into Widmanstatten structure. The micro-hardness of recycled TC4 alloy is increased with the increase of the sintering temperature.