The requirements for silica sol and refractory powder for mold shell in face layer differ from that in back layer.
硅溶胶型壳的面层和背层对硅溶胶和耐火粉料的要求是不一样的。
If gypsum is adopted as the face layer because the surface is smooth and flat secondary surface-rolling procedure for surface can be omitted.
若采用石膏作面层，其光洁平整的表面可以省去表面的二次抹平工序。
This paper describes the research and manufacture of titanium investment casting for large sized housing type structure of thin wall using the ceramic shell with metal face layer.
本文叙述了采用金属面层陶瓷型壳工艺，研制大型薄壁壳体类钛合金精密铸件。
This paper describes the research and manufacture of titanium investment casting for large sized housing type structure of thin wall using the ceramic shell with metal face layer.
本文叙述了采用金属面层陶瓷型壳工艺，研制大型薄壁壳体类钛合金精密铸件。
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