The origin of inclusions in rough sport disfigurement on the surface of investment castings was analyzed and the corresponding solutions were given according to the composition of inclusions.
根据熔模铸件表面麻点内夹杂物的成分组成，对其来源进行了分析，并提出了相应的解决措施。
A systematic analysis of saw cutting handicap for gear steel was done, in which on local parts of saw cutting surface denser large-granular hard inclusions were found.
对齿轮钢钢材锯切下料时遇到的锯切障碍现象进行了系统的分析，在锯切面的局部发现了较为密集的大颗粒硬质夹杂物。
Batch production shows there are no shrinkage cavity and porosity in casting, and no blowholes and sand inclusions on the top surface. The yield of the casting is 81%.
经批量生产验证，铸件内无缩孔、缩松缺陷，上表面无渣孔、气孔缺陷，工艺出品率81%。
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