中北大学学报（自然科学版）2026，Vol.47Issue(2)：164-170,7.DOI:10.62756/jnuc.issn.1673-3193.2025.10.0003
固溶时效处理对TC4钛合金显微组织及性能的影响
Effect of Solution Aging Treatment on the Microstructure and Properties of TC4 Titanium Alloy
摘要
Abstract
In order to expand engineering application ranges of TC4 titanium alloy with α+β dual-phase,its microstructure and mechanical properties need to be precisely controlled.Taking forged TC4 as the research object,this study aims to optimize its strength-plasticity synergy.Systematically investigated were the effects of three cooling methods(water cooling,air cooling,and furnace cooling)following solution treatment at 920℃(40 min),as well as aging treatments at 500℃,550℃,and 600℃for 3 h after water-cooled solution treatment,on the alloy's microstructure and mechanical properties.Microstructural evolution was observed using optical microscopy(OM)and scanning electron microscopy(SEM),while mechanical properties were characterized via room-temperature tensile tests.The results indicate that solution cooling significantly influences the alloy's microstructure.Air cooling induces a stable bimodal microstructure composed of equiaxed primary α grains and lamellar α phases,endowing the alloy with optimal comprehensive mechanical properties.After water-cooled solution treatment,secondary α phases and lamellar α grains gradually coarsen with increasing aging temperature,accompanied by an expansion of the interlamellar spacing.Among these,550℃is identified as the optimal aging temperature.The alloy achieves the best strength-plasticity balance after combined treatment at 920℃(40 min)water cooling followed by 550℃(3 h)aging,with an ultimate tensile strength of 1022 MPa and an elongation of 13%.This study clarifies the optimal solution and aging parameters for forged TC4,and provides reliable technical references and guidance for microstructure-property regulation and heat treatment process formulation in practical engineering.关键词
TC4钛合金/固溶处理/时效处理/显微组织/力学性能Key words
TC4 titanium alloy/solution treatment/aging treatment/microstructure/mechanical properties分类
通用工业技术引用本文复制引用
严晓琨,李佳翔,董瑞峰,郭宇墨,赵宇宏..固溶时效处理对TC4钛合金显微组织及性能的影响[J].中北大学学报（自然科学版）,2026,47(2):164-170,7.基金项目
山西省重点研发计划项目(202202050201014) （202202050201014）
