固溶热处理对两相钛合金α片层球化行为的影响  

Effect of Solution Treatment on Globularization Evolution of α Lamellae of High Strength and High Toughness Titanium Alloy

作　　者：齐敏 马英杰[1] 黄森森[1] 邱建科[1] 雷家峰[1] 杨锐[1] Qi Min;Ma Y ingjie;Huang Sensen;Qiu Jianke;Lei Jiafeng;Yang Riu(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016

出　　处：《稀有金属材料与工程》2020年第3期997-1001,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51871225);中国科学院战略性科技先导专项(B类)(XDB06050100)。

摘　　要：以Ti-Al-Sn-Zr-Mo-Cr-V-Fe系合金为研究对象,设计不同的固溶热处理工艺,考察保温时间对合金α片层球化行为的影响,为优化合金的强韧性匹配建立基础。通过对金相组织进行观察以及对片层尺寸进行统计分析,得到了不同固溶时间下α片层尺寸的变化规律及球化的演变。结果表明,随着固溶时间的增加,α相球化率先增加至最高后基本趋于稳定,并利用界面分离、片层终止理论对该现象进行分析说明。结果表明,本研究为该合金α/β两相区热处理工艺参数的设计及强度韧性匹配合理性提供一定的实验基础。The alloy of Ti-Al-Sn-Zr-Mo-Cr-V-Fe system was used as the research object. Different solution heat treatments were designed to establish the foundation of the best match optimization between the toughness and hardness of the alloy. The influence of holding time of solution treatment on the globularization of α layer was studied by metallographic microstructure and lamellae size analysis. Results show that with the increase of the holding time, the globularization rate increases to the highest and then it becomes stable. The phenomenon was also analyzed by boundary splitting and termination migration. It is demonstrated that the study provides experimental basis for the design of thermal processing parameters and the matching between strength and toughness in α/β two-phase zone.

关 键 词：钛合金 片层球化 固溶热处理 

分 类 号：TG146.23[一般工业技术—材料科学与工程]