摘要
TiAl金属间化合物由于具有低密度、优异的高温强度以及高温蠕变抗力,在航空航天及汽车领域具有广阔的应用前景。但是,传统TiAl合金在热加工、成形等方面对设备有较为苛刻的要求,阻碍了其在工业应用中的进一步发展。为此,通过采用合金设计的手段,以提升整体加工性能为目标,成功设计并筛选得到了β凝固的名义成分为Ti-43.5Al-4Nb-1Mo-0.1B(原子百分数,%)的TNM合金,是目前较为理想的变形TiAl合金。该合金不仅具有优良的加工性能,并且兼顾强度、塑性、断裂韧性和抗蠕变性能等各个方面的性能目标。简要总结了TNM合金的设计理念、组织演变规律、微合金化进程、热处理工艺、室温高及温性能,以及实际应用等方面的研究进展,并对TNM合金未来的发展进行了展望。
TiAl intermetallic have broad application prospects in aerospace and automotive fields because of their low density,excellent high temperature strength and high temperature creep resistance.However,the traditional TiAl alloy has more stringent requirements for the equipment in hot processing,forming and other aspects,hinder its further development in industrial applications.In order to improve the overall workability,TNM alloy,β solidified,with nominal composition Ti-43.5Al-4Nb-1Mo-0.1B(at%)was successfully designed and selected by alloy design,which is an ideal deformed TiAl alloy at present.The alloy not only has excellent machining properties,but also takes into account the performance objectives of strength,plasticity,fracture toughness and creep resistance.The research progress of TNM alloy design concept,microstructure evolution law,microalloying process,heat treatment process,room temperature and high temperature performance and practical application are summarized briefly,andthe future development of alloys are prospected.
作者
油如月
王强
赵春玲
杨刚
梁永锋
刘辰
季显坤
林均品
YOU Ruyue;WANG Qiang;ZHAO Chunling;YANG Gang;LIANG Yongfeng;LIU Chen;JI Xiankun;LIN Junpin(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China)
出处
《中国材料进展》
CAS
CSCD
北大核心
2023年第8期669-680,共12页
Materials China
基金
中央高校基本科研业务费专项资金资助项目(FRFMP-20-44)。
