Nb-Ti-Cr-Si基超高温合金的室温断裂韧性研究进展  

Recent Progress on Room Temperature Fracture Toughness of Nb-Ti-Cr-Si Based Ultrahigh Temperature Alloy

作　　者：郭宝会[1,2] 郭喜平[1] GUO Baohui GUO Xiping(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072 School of Mathematics and Physics, Weinan Normal University, Weinan 714099)

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072 [2]渭南师范学院数理学院,渭南714099

出　　处：《材料导报》2016年第17期148-151,共4页Materials Reports

基　　金：陕西省科技厅研究项目(2015KW-022);渭南市科技局项目(2015KYJ-2-4);渭南师范学院科研计划项目(15YKF001;2015ZD002);渭南师范学院特色学科重大建设项目(14TSXK006);陕西数学扶持学科基金

摘　　要：Nb-Ti-Cr-Si基超高温合金具有良好的高温强度和高温抗氧化性能,但室温断裂韧性较差。为了提高该合金的室温断裂韧性,分析了该合金室温断裂韧性较低的原因,对有坩埚整体定向凝固技术、整体定向凝固+高温均匀化处理和热压烧结法等工艺对Nb-Ti-Cr-Si基超高温合金的室温断裂韧性的影响做了评述,指出了提高该合金室温断裂韧性将来努力的方向。Nb-Ti-Cr-Si based ultrahigh temperature alloy possesses good high temperature strength and high temperature oxidation resistance,but its room temperature fracture toughness is poor.In order to improve room temperature fracture toughness,the reason of poor room temperature fracture toughness are discussed,and the effects of integrally directional solidification with the use of a crucible,directional solidification after homogenization treatment and hot press technologies on the room temperature fracture toughness of Nb-Ti-Cr-Si based ultrahigh temperature alloy are reviewed.Finally,the future direction to regarding room temperature fracture toughness of these alloy are proposed.

关 键 词：Nb-Ti-Cr-Si基超高温合金 室温断裂韧性 Cr2Nb相 

分 类 号：TF841.6[冶金工程—有色金属冶金]