环形钛合金铸件缩孔工艺改进与试验验证  

Shrinkage Process Improvement and Experimental Verification of the Circular Titanium Alloy Casting

作　　者：孙妍 马静 张光 郄喜望 赵瑞斌 南海 SUN Yan;MA Jing;ZHANG Guang;QIE Xi-wang;ZHAO Rui-bin;NAN Hai(Baimtec Material Co.,Ltd.,Beijing 100094,China;AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]北京航空材料研究院股份有限公司,北京100094 [2]中国航发北京航空材料研究院,北京100095

出　　处：《铸造》2024年第10期1429-1434,共6页Foundry

摘　　要：针对环形钛合金铸件在熔模铸造生产过程中常出现缩孔缺陷,设计了三种冒口优化方案,并通过ProCAST软件进行模拟仿真分析。结果表明,采用增大冒口模数的第一种成形工艺方案时,钛合金铸件具有较好的充型能力和较优的凝固顺序。基于确定的最佳成形方案,试制了12个试验件,进行X光检验和力学性能测试。结果表明,铸件表面光洁平整,内部组织致密,无缩孔缺陷,力学性能满足要求。本研究降低了压坑的发生率,铸件内部的冶金质量得到了显著改善。In view of the shrinkages in a circular titanium alloy casting during investment casting,three optimization schemes of risers were designed and simulated by ProCAST software.The results revealed that the titanium casting under the first process scheme with larger riser modulus presented a better filling capacity and solidification sequence.The best process scheme was selected to trial-produce 12 experimental titanium casting,and the X-ray inspection and mechanical properties tests were carried out.The results indicated that the casting surface was smooth,the inner structure was dense without shrinkages and the mechanical properties met the requirements.This study reduced the incidence of indentation and significantly improved the internal metallurgical quality of the titanium castings.

关 键 词：钛合金 熔模铸造 缩孔缺陷 模拟仿真 冒口优化 

分 类 号：TG292[金属学及工艺—铸造]