castings

1.Misrun is the common defects found in oven door castings process.

不足是焦铸件常见铸造缺陷。

2.The coatings composed by the chosen refractory is crackfree in high temperature.The castings using the coatings is free of surface defect and the surface roughness can reach 18 - S.

根据此法选出的耐材料所组成的涂料在高温急热时不开，出的铸件表面无缺陷，表面粗糙度达18-S。