热处理温度对选择性激光熔化TC4钛合金板不同成形面组织和性能的影响
Effect of heat treatment temperature on microstructure and properties of different forming surfaces of TC4 titanium alloy sheet by selective laser melting
摘 要
通过热处理试验、金相检验、扫描电镜观察、X射线衍射分析和硬度测试,分析了热处理温度对选择性激光熔化TC4钛合金板不同成形面的相组成、显微组织和硬度的影响。结果表明:随热处理温度由750℃升高至950℃,选择性激光熔化TC4钛合金板顶面和侧面的针状马氏体α'相不断减少;当热处理温度为850℃时,针状α'相完全转变为α+β相,当热处理温度(950℃)超过α相转变温度时,β相含量升高;钛合金板顶面基本没有柱状β相,形成了等轴状β相,其侧面仍存在柱状β相;钛合金板顶面和侧面的硬度随着温度的升高呈先减小后增大的趋势。
TC4钛合金
热处理
显微组织
硬度
laser selective melting
TC4 titanium alloy
heat treatment
microstructure
hardness
Abstract
By heat treatment test,metallographic examination,scanning electron microscope observation,X-ray diffraction analysis and hardness testing,the effects of heat treatment temperature on phase composition,microstructure and hardness of different forming surfaces of TC4 titanium alloy sheet by selective laser melting were analyzed.The results showed that with the increase of the heat treatment temperature increased from 750℃ to 950℃,the acicular martensite α'phase on the top and side surfaces of selective laser melting TC4 titanium alloy sheet by selective laser melting decreased continuously.When the heat treatment temperature was 850℃,the acicular α'phase was completely transformed into α+β phase.When the heat treatment temperature (950℃) exceeded the α phase transition temperature,the content of β phase increased,the top surface of titanium alloy sheet had basically no columnar β phase,and equiaxed β phase were formed,and there were still columnar β phase on the side.The hardness of the top and side surfaces of titanium alloy sheet first decreased and then increased with the increase of heat treament temperature.
中图分类号 TG166.5 DOI 10.11973/lhjy-wl202203001
所属栏目 试验与研究
基金项目 国家自然科学基金资助项目(51971129);克拉玛依市科技重大专项(2018ZD002B);科技援疆计划(2019E0235)
收稿日期 2021/5/18
修改稿日期
网络出版日期
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备注王贞涛(1996-),男,硕士研究生,主要从事铝合金焊接工作,wangzhentao23@163.com
引用该论文: WANG Zhentao,YANG Shanglei,PENG Zeng,GAO Zihao. Effect of heat treatment temperature on microstructure and properties of different forming surfaces of TC4 titanium alloy sheet by selective laser melting[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2022, 58(3): 1～5
王贞涛,杨尚磊,彭曾,高紫豪. 热处理温度对选择性激光熔化TC4钛合金板不同成形面组织和性能的影响[J]. 理化检验－物理分册, 2022, 58(3): 1～5
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【4】YANG J J,YU H C,YANG H H,et al.Prediction of microstructure in selective laser melted Ti6Al4V alloy by cellular automaton[J].Journal of Alloys and Compounds,2018,748:281-290.
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【7】WYSOCKI B,MAJ P,SITEK R,et al.Laser and electron beam additive manufacturing methods of fabricating titanium bone implants[J].Applied Sciences,2017,7(7):657.
【8】RAFI H K,KARTHIK N V,GONG H J,et al.Microstructures and mechanical properties of Ti6Al4V parts fabricated by selective laser melting and electron beam melting[J].Journal of Materials Engineering and Performance,2013,22(12):3872-3883.
【9】LIU S Y,SHIN Y C.Additive manufacturing of Ti6Al4V alloy:a review[J].Materials&Design,2019,164:107552.
【10】MERTENS A,REGINSTER S,PAYDAS H,et al.Mechanical properties of alloy Ti-6Al-4V and of stainless steel 316L processed by selective laser melting:influence of out-of-equilibrium microstructures[J].Powder Metallurgy,2014,57(3):184-189.
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【14】YAN X, CHEN C, HUANG C, et al.Effect of heat treatment on the phase transformation and mechanical properties of Ti-6Al-4V fabricated by selective laser melting[J].Journal of Alloys and Compounds,2018,764:1056-1071.
【15】李笑,李剑.Ti-6Al-4V合金厚板固溶时效热处理工艺的正交试验优化[J].理化检验(物理分册),2021,57(3):14-18.
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