选区激光熔化TC4试样的力学性能及微观组织分析

张成; 刘玉德; 张萌; 马英怡; 黄志刚

doi:10.15980/j.tzzz.2020.03.016

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选区激光熔化TC4试样的力学性能及微观组织分析
Mechanical Properties and Microstructure Analysis of Selective Laser Melting TC4 Sample
2020年40卷第3期页码：302-306
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.03.016

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[1]张成,刘玉德,张萌,马英怡,黄志刚.选区激光熔化TC4试样的力学性能及微观组织分析[J].特种铸造及有色合金,2020,40(03):302-306.

Zhang Cheng, Liu Yude, Zhang Meng, et al. Mechanical Properties and Microstructure Analysis of Selective Laser Melting TC4 Sample[J]. Special Casting & Nonferrous Alloys, 2020,40(3):302-306.
[1]张成,刘玉德,张萌,马英怡,黄志刚.选区激光熔化TC4试样的力学性能及微观组织分析[J].特种铸造及有色合金,2020,40(03):302-306. DOI： 10.15980/j.tzzz.2020.03.016.

Zhang Cheng, Liu Yude, Zhang Meng, et al. Mechanical Properties and Microstructure Analysis of Selective Laser Melting TC4 Sample[J]. Special Casting & Nonferrous Alloys, 2020,40(3):302-306. DOI： 10.15980/j.tzzz.2020.03.016.

摘要

采用选区激光熔化技术成形TC4试样

研究了线扫描功率、曝光时间和退火处理对TC4成形试样微观组织和性能的影响。结果表明

试样的缺陷随线扫描功率的升高而减少。线扫描功率在400 W

曝光时间为30μs

经过退火处理后

试样抗拉强度达到1 153MPa

高出普通TC4钛合金锻件近300MPa

同时

试样的拉伸断面总体呈脆性断裂。

Abstract

A selective laser melting technology was used to form TC4 samples.The effects of scan line power

exposure time and annealing process on the microstructure and properties of TC4 sample were investigated.The microstructure

section morphology and mechanical properties of the samples before and after heat treatment were analyzed.The results show that the defects of sample are decreased with the increase of scan line power.The tensile strength of the sample after annealing reaches 1 153 MPa

which is nearly 300 MPa higher than that of ordinary forging TC4 titanium alloy when the power of the scan line is 400 Wand the exposure time is 30μs.The tensile fracture of the sample presents brittle crack.