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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 alloy adjusting piece is the core part of the vector spout part of a certain type of aeroengine. It belongs to the typical large-size thin-walled structural part, and is integrally cast and shaped by the investment casting process. In the regulation of the film production process, difficult to control the quality of metallurgy, crack, shrinkage problem has been the main factor affecting casting yield. After the test and analysis, the causes and influencing factors of cracks and shrinkage defects were confirmed. By optimizing the pouring system and controlling the shell preheating temperature and pouring temperature, the casting scrap and the shrinkage defect rate are significantly reduced, and the castings with good metallurgical quality are obtained and the process yield is improved.