浇注系统对高温合金薄壁熔模铸件质量的影响  

Effect of Gating System and Process Conditions on the Quality of Thin-Walled Supperalloy Adjust Sheet

作　　者：张贺[1] 韩大平[1] 张向明 冯文刚[1] 屠晓林 朱洪斌[1] 

机构地区：[1]沈阳黎明航空发动机(集团)有限责任公司 [2]沈阳黎明航空发动机(集团)有限责任公司职业技术学院

出　　处：《特种铸造及有色合金》2014年第4期389-391,共3页Special Casting & Nonferrous Alloys

摘　　要：K424合金调节片为某型号航空发动机矢量喷口部位的核心部件,属于典型的大尺寸薄壁结构件,采用熔模铸造工艺整体铸造成形。在调节片生产过程中,冶金质量难以控制,裂纹、缩松问题一直是影响铸件成品率的主要原因。经试验分析,确定了裂纹、缩松缺陷形成原因及影响因素。通过优化浇注系统、控制型壳预热温度和浇注温度,显著降低了铸件裂纹、缩松缺陷废品率,获得了冶金质量优良的调节片铸件,提高了工艺成品率。The K424 superalloy adjustment sheet as one of the core components of the aero-engine which belongs to large size thin-walled structural parts was produced by investment casting. The porosity, crack can be easily observed in the adjust sheet during the investment process as a result of metallurgical quality. Origination of crack and shrinkage porosity was analyzed. By optimizing gating system, control- ling pre-heating temperature of the mold and pouring temperature, crack and shrinkage porosity can be reduced greatly, adjust sheet with desirable quality was produced, obviously improving the yield produc- tion rate.

关 键 词：熔模铸造 薄壁件 浇注系统 

分 类 号：TG249.5[机械工程—精密仪器及机械] TG146.15[金属学及工艺—铸造]