摘要
研究了Ti-1300合金经不同温度固溶处理和固溶+时效处理后的组织和性能。结果表明:Ti-1300合金在固溶处理后,随着固溶温度升高,合金的抗拉强度和屈服强度逐渐降低,断面收缩率先升高后降低,断后伸长率有所升高。Ti-1300合金在850℃固溶处理可获得最佳的综合性能。通过固溶和时效处理,Ti-1300合金硬度随着固溶温度的升高而增大。当固溶处理在相变点以下时,β相中时效析出次生αs相较粗大;而固溶处理在相变点以上时,β相中时效析出次生αs相较细小且均匀。
Microstructure and mechanical properties of Ti-1300 alloy were investigated after the solution treatment or the solution treatment followed by subsequent aging. The results show that the heat treatment process has a significant effect on the microstructure and mechanical properties of Ti-1300 alloy. The ultimate tensile strength and yield strength decrease with the increasing of solution temperature, but the elongation of Ti-1300 alloy presents an opposite changing tendency. Nevertheless, the reduction of area of Ti-1300 alloy firstly increases and then decreases. Ti-1300 alloy was solution treated at 850 oC to obtain the best combination of strength and ductility. It is found that the micro-hardness of Ti-1300 alloy increases with increasing of solution temperature under the same aging condition. Compared with solution treatment below the β transus temperature of Ti-1300 alloy, the second phase αs precipitates are finer and more uniform because of the incremental concentration of excess vacancy in the solution process above β transus temperature of Ti-1300 alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第5期1209-1213,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51401058)
陕西省重大科技成果转化引导专项(2012KTCG04-04)
科技创新团队项目(2012KCT-23)
