恢复热处理固溶温度对DD11单晶合金组织及持久性能的影响  

Effect of Solution Temperature in Recovery Heat Treatment on Microstructure and Stress Rupture Properties of Single Crystal Alloy DD11

作　　者：刘晨光[1] 杨振宇 郑素杰 沈滨 赵云松[1] 吴庆辉 郑帅[1] 张剑[1] LIU Chen-guang;YANG Zhen-yu;ZHENG Su-jie;SHEN Bin;ZHAO Yun-song;WU Qing-hui;ZHENG Shuai;ZHANG Jian(National Key Laboratory of Advanced High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]北京航空材料研究院先进高温结构材料重点实验室,北京100095

出　　处：《铸造》2021年第5期560-564,共5页Foundry

摘　　要：为修复单晶合金涡轮叶片退化组织及提高其持久性能,对一种第二代镍基单晶合金DD11进行1070℃/3000h长期时效处理后再进行恢复热处理,研究了恢复热处理工艺中固溶温度对DD11单晶合金组织和持久寿命的影响。结果表明:恢复热处理可以有效消除长期时效处理试样中粗大γ′相组织并恢复其体积含量,使合金的组织和持久寿命恢复到完全热处理状态。In order to repair the degenerated structure of single crystal alloy turbine blade and improve its stress rupture properties,a second-generation nickel base single crystal alloy DD11 was first treated by a 3000-h aging at 1070℃,and then followed by recovery solution heat treatment.The effect of solution temperature on the microstructure and stress rupture life of DD11 single crystal alloy was investigated.The research results show that the recovery heat treatment can effectively eliminate the coarseγ'phase in the long-term aging treated alloy and recover its volume content,which make the microstructure and stress rupture life of the alloy return to the level of complete heat treatment state.

关 键 词：DD11单晶合金 γ/γ′相组织 恢复热处理 固溶温度 

分 类 号：TG132.3+2[一般工业技术—材料科学与工程]