1.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.

1.根据此法选材料所组成涂料在温急热时不开裂，浇注件表面无缺陷，表面粗糙度达18-S。