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近年来研制出一种熔模精铸壳型用新型预制粘结剂ΓС-20З,它是ЗТС-40硅酸乙酯的部分水解溶液。工业生产的ΓС-20З预制粘结剂曾在工厂条件下用于重要的不等轴和定向组织零件的铸造。曾用电熔刚玉微粉及蓝晶石硅线石精矿粉为基,每层壳型撒有粒状电熔刚玉的铸型,在真空中无支撑填料浇注高温合金。在所有情况下,新壳型的质量均优于ЗТС-40硅酸乙酯批生产工艺制造的壳型。
In recent years, a new type of prefabricated binder ΓС-20З has been developed for investment casting of fine casting shell, which is a partially hydrolyzed solution of ЗТС-40 ethyl silicate. Commercially available ΓС-20З precast binders were used in foundry conditions for the casting of significant non-isometric and oriented tissue parts. Have used fused alumina corundum and kyanite sillimanite powder as a base, each shell cast with granular fused corundum casting, casting in the vacuum without support filler superalloy. In all cases, the new shell is of better quality than the ЗТС-40 ethyl silicate batch process.