K4169合金整体导向环精铸技术及热处理工艺研究  

Investment Casting Technology and Heat Treatment Process of K4169 Superalloy Integral Nozzle Ring

作　　者：汤鑫 曹腊梅 盖其东 薛明 张勇 

机构地区：[1]先进高温结构材料国防科技重点实验室,北京100095

出　　处：《宇航材料工艺》2007年第6期82-86,共5页Aerospace Materials & Technology

摘　　要：文摘介绍了K4169合金整体导向环铸件的研制过程与方法。研究获得了整体导向环铸件陶瓷型芯、蜡模和型壳制备、真空熔炼浇注工艺。针对K4169铸造高温合金偏析严重的特点,研究出了一种新的低成本的热处理制度:1 150℃/4 h,AC+1 095℃/2 h,AC+955℃/1 h,AC+720℃/8 h,以56℃/h冷却到620℃/8 h,AC。采用该热处理制度处理的K4169合金,力学性能优于采用航标规定的热处理制度处理的。重点分析了K4169合金铸件组织偏析产生的原因,并提出了解决措施。所研制的整体导向环铸件,其冶金质量、化学成分和力学性能满足铸件技术条件的规定。The investigation process of K4169 alloy integral nozzle ring casting is described. The casting＇ s manufactural technology have been obtained, including ceramic core, wax pattern, shell mould, metal melting and pouting process, vacuum heat treatment etc. A new kind of low cost heat-treatment condition has been obtained for 1150℃/4 h,AC ＋ 1095℃/2 h, AC ＋ 955℃/1 h, AC ＋ 720℃/8 h, at 56℃/h cool to 620℃/8 h, AC. Comparison with conventional heat-treatment, the mechanics properties of K4169 alloy are greatly improved by means of this new heat-treatment condition. The alloy＇ s microstructure uniformity problems are analyzed in this paper. Furthermore, the measures are provided for this. The casting＇ s metallurgical quality, chemical composition and mechanical properties conform to special technical specification.

关 键 词：导向环 型芯 蜡模 壳型 熔炼浇注 热处理 整体涡轮导向环 运载动力装置 

分 类 号：V228[航空宇航科学与技术—飞行器设计]