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【轻有色合金】固溶时效温度对Ti-6Al-4V-0.5Si合金组织性能的影响
发布时间:2020-09-14 文章来源:本站原创
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谢文芳1 郭雷明2,3 张淼斐刘亚洲2

(1.中国航空工业集团公司洛阳电光设备研究所; 2.河南科技大学材料科学与工程学院;3.广州纳联材料科技有限公司)

摘要:分析了不同固溶时效温度对Ti-6Al-4V-0.5Si合金抗拉强度、伸长率及显微组织的影响。结果表明,固溶处理后Ti-6Al-4V-0.5Si合金中存在较多的六方α′和斜方α″两种马氏体相和亚稳定相。时效处理后,马氏体相和亚稳定相分解再结晶得到分散的α+β相。综合分析表明,固溶时效工艺为950 ×30 min(水冷,WQ)+480 ×4 h(空冷,AQ),合金的综合性能最好,此时合金的抗拉强度和伸长率分别为745.6 MPa8.3%,比铸态合金分别提高了24.8%36.0%

关键词:钛合金;抗拉强度;伸长率;固溶时效;位错密度

中图分类号:TG146.23;TG156   文献标志码    A

DOI:10.15980/j.tzzz.2020.04.023

 

Effects of Solution Aging Temperature on Microstructure and Properties of Ti-6Al-4V-0.5Si Alloy

Xie Wenfang1,Guo Leiming2,3, Zhang Miaofei2, Liu Yazhou2

(1.AVIC Luoyang Institute of Electro optical Devices; 2.School of Materials Science and Engineering, Henan University of Science and Technology; 3.Guangzhou Material Technology Innovations Co., Ltd.)

Abstract:The effects of solution aging temperature on the tensile strength, elongation, morphology and phase composition of Ti-6Al-4V-0.5Si alloy were analyzed. The results show that there are more hexagonal α′ and oblique α″ martensite phases in Ti-6Al-4V-0.5Si alloy after solution treatment. After aging treatment, the martensite phase is decomposed and recrystallized to form dispersed α+β phase. Comprehensive analysis shows that the comprehensive properties of the alloy present desirable with solution 950 for 30 min and water quenching and aging at 480 for 4 h and air quenching, where the tensile strength and elongation reach 745.6 MPa and 8.3%, respectively, which are 24.8% and 36.0% higher than those of as cast ones .

Key Words: Titanium Alloy, Tensile Strength, Elongation, Solution Aging, Dislocation Density

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