摘要
实验使用添加0.023%磷进行微合金化的GH761合金,采用6种不同处理制度进行细晶化处理。结果表明,一次热处理温度在780~950℃范围内变化时,对合金的晶粒组织影响不大,但与标准热处理组织相比,晶粒组织显著细化。采用830℃×4 h,AC,720℃×24 h,AC的热处理制度时,合金的综合力学性能较好。与标准处理相比,室温和650℃的抗拉强度和屈服强度均明显提高,塑性也有所改善,而且650℃/690 MPa持久寿命比普通GH761合金650℃/637 MPa的持久寿命长。
Six methods of heat treatment were adopted to gain a fine grain structure of GH761 alloy,which was micro-alloyed by adding 0.023% phosphorus.When the temperature of the given primary treatment changed within 780~950℃,no obvious effect on the grain microstructure of the alloy was observed.Compared with that of commercial GH761 alloy treated by the standard treatment,the grains of the test alloy became much finer.The higher mechanical properties were obtained when the alloy was treated at 830 ℃ for 4h,AC,and ...
出处
《航空材料学报》
EI
CAS
CSCD
2006年第4期1-5,共5页
Journal of Aeronautical Materials
基金
国家自然科学基金资助项目(5027107250471083)
关键词
GH761合金
细晶处理
力学性能
析出
GH761 alloy
fine grain treatment
mechanical property
precipitate
