西华大学学报（自然科学版）2017，Vol.36Issue(3)：40-42,3.DOI:10.3969/j.issn.1673-159X.2017.03.007
钴基合金气门座圈缩松缺陷分析及改进措施
The Analysis on the Shrinkage Defects of Cobalt Alloys Valve Seat Ring and the Improvement Measures
摘要
Abstract
The author has analyzed the quality problem of a certain type of marine diesel engine inlet valve seat on the shrinkage defects in the production process.The shell of the production process and the casting technology of casting was analyzed and found out the causes of the shrinkage defects.In the end,we presented these improvement measures:the first measure is to use red shell casting and appropriately reduce the cooling speed.;the second one is to adjust the metal liquid melt temperature and pouring temperature;the third one is to increase the inside sectional area;the fourth one is to increase the circular radius located between the runner and the valve seat ring cavity.The results show that the ratio of shrinkage defects decreased from about 12 percent to below 0.5 percent on account of improved production technology.关键词
气门座圈/钻基合金/缩松缺陷/改进措施Key words
valve seat/cobalt alloys/shrinkage defects/improvement measures分类
矿业与冶金引用本文复制引用
杜子文..钴基合金气门座圈缩松缺陷分析及改进措施[J].西华大学学报（自然科学版）,2017,36(3):40-42,3.
