主办:陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊:1976年

汽车实用技术 ›› 2026, Vol. 51 ›› Issue (8): 92-99.DOI: 10.16638/j.cnki.1671-7988.2026.008.017

• 工艺·材料 • 上一篇    

热等静压对激光熔化成形钛合金组织和 性能的影响

李祥 1,徐如涛 1,高新红 1,张田 1,向俊龙 2   

  1. 1.成都航空职业技术大学 工程实训中心; 2.成都航空职业技术大学 新材料学院
  • 发布日期:2026-04-23
  • 通讯作者: 李祥
  • 作者简介:李祥(1996-),男,助教,研究方向为金属材料成形
  • 基金资助:
    成都航空职业技术大学校级科研项目(ZZX0625122);材料腐蚀与防护四川省重点实验室开放基金(2023 CL21);航空科学基金(2023Z053158001)

The Influence of Hot Isostatic Pressing on the Microstructure and Properties of Titanium Alloys Formed by Laser Melting

LI Xiang1 , XU Rutao1 , GAO Xinhong1 , ZHANG Tian1 , XIANG Junlong2   

  1. 1.Engineering Training Center, Chengdu Aeronautic Polytechnic University; 2.School of Advanced Materials, Chengdu Aeronautic Polytechnic University
  • Published:2026-04-23
  • Contact: LI Xiang

摘要: 为减少选区激光熔化(SLM)成形 TC4 钛合金组织中的孔隙、裂纹,提升合金综合性 能,采用热等静压技术对 SLM 成形 TC4 钛合金进行后处理,并对比无后期处理和传统热处 理形成的合金微观结构、微区元素成分和表面显微硬度。结果表明,采用热等静压技术处理的 合金显微组织由 α 相和 β 相组成,孔隙数量明显减少,裂纹得以修复呈现近似颗粒状结构, 形成新的 Ti-Al 金属间化合物及新相 Ti0.66Al3V0.33,且试样维氏硬度为 455.60 HV,相比无后 期处理和传统热处理合金试样维氏硬度分别提高 40.9%和 18.1%。这为其在汽车零部件制造 中的稳定应用提供保障,为解决汽车用钛合金部件的质量提升提供技术支撑。

关键词: 选区激光熔化;热处理;热等静压;裂纹

Abstract: To reduce the pores and cracks in the microstructure of the TC4 titanium alloy formed by selective laser melting (SLM), and to enhance the comprehensive properties of the alloy, the post-treatment of the SLM-formed TC4 titanium alloy is carried out using the hot isostatic pressing technology. The microstructure, micro-area elemental composition and surface microhardness of the alloys formed without post-treatment and by traditional heat treatment are compared. The results show that the microstructure of the alloy treated by hot isostatic pressing technology is composed of α phase and β phase, the number of pores is significantly reduced, the cracks are repaired, presenting an approximately granular structure, new Ti-Al intermetallic compounds and new phase Ti0.66Al3V0.33 are formed, and the Vickers hardness of the sample is 455.60 HV. The Vickers hardness of the alloy samples is increased by 40.9% and 18.1% respectively compared with those without post-treatment and those with traditional heat treatment. This provides a guarantee for its stable application in the manufacturing of automotive parts and offers technical support for improving the quality of titanium alloy components used in automobiles.

Key words: SLM forming; heat treatment; hot isostatic; crack