化学成分对GH738合金γ'相溶解和析出行为的影响
Influence of Chemical Composition on Dissolution and Precipitation Behaviors of γ'Phase in GH738 Alloy
王哲 1刘芳 2薛怡然 1古岩 1邹卓 1王蔓1
作者信息
- 1. 中国航发沈阳黎明航空发动机有限责任公司,辽宁沈阳 110043
- 2. 中国科学院金属研究所,辽宁沈阳 110016
- 折叠
摘要
采用差热分析法和水冷试验测定了不同成分GH738合金中γ'相的溶解温度,对不同成分的GH738合金分别进行了在1 030℃、1 040℃、1 045 ℃和1 050 ℃加热后油冷固溶处理随后在845 ℃保温4 h空冷和760 ℃保温16 h空冷的两次时效处理,以研究化学成分对GH738合金中γ'相的溶解和析出行为的影响.结果表明:随着Al+Ti含量的增加,合金中γ'相的溶解温度提高,Cr和Co含量的提高也在一定程度上提高了γ'相的溶解温度;化学成分和固溶温度均显著影响合金中γ'相的析出行为,随着Al+Ti含量的增加,γ'相的尺寸变化不大,但时效后一次γ'相的数量减少;在化学成分相同的情况下,随着固溶温的提高,合金中时效过程中析出的二次γ'相数量增加、尺寸减小.
Abstract
Dissolution temperatures of γ'phase in different compositions of GH738 alloys were surveyed by using differential thermal analysis method and water cooling test,and the different compositions of GH738 alloys were solution treated by heating at 1 030,1 040,1 045 and 1 050 ℃ followed by oil cooling,respectively,and double aged by heating at 845 ℃ for 4 h then air cooling followed by heating at 760 ℃ for 16 h then air cooling,for the purpose of investigating the effect of chemical composition on dissolution and precipitation behaviors of γ'phase in GH738 alloy.The results indicated that(a)with the increase in content of Al plus Ti the dissolution temperature ofγ'phase in the alloy rose,and the increase in contents of Cr and Co rendered also the dissolution temperature of γ'phase higher to a degree;(b)both the chemical composition and solution temperature had a significant effect on the precipitation behavior of γ'phase in the alloy,and as the contents of Al plus Ti increased,γ'phase had no evident change in size,but the primary γ'phase decreased in amount after aging;and(c)in the case of the same chemical composition,as the solution temperature became higher,the secondary γ'phase which precipitated during aging increased in amount and decreased in size in the alloys.
关键词
GH738合金/γ'相/化学成分/溶解/析出Key words
GH738 alloy/γ'phase/chemical composition/dissolution/precipitation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据