FIELD: investment casting of jewelry from alloys of precious and nonferrous metals. SUBSTANCE: powder mixture from preparation of mold mixed with water in molding contains, wt.%: cristobalite, 48-78; high-strength gypsum (α+β), 20-50; potassium nitrate, 0.5-2.0; potassium dihydrophosphate, the balance. Cristobalite is used with admixture of tridymite and amorphous quartz in amount of not more 20 or 40%, and alkali metal oxides, not more 2.0%. EFFECT: higher strength characteristics of molding sand ensuring high quality of castings. 3 cl, 6 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| MIXTURE FOR MANUFACTURE OF INVESTMENT MOLDS | 1993 |
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| METHOD FOR MAKING CORES AND MOLDS WITH USE OF GYPSUM BINDER AT MAKING CASTINGS OF NON-FERROUS AND FERROUS ALLOYS | 2000 |
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| COMPOUND FOR MANUFACTURING REFRACTORY SHELL IN CASTING DENTAL PROSTHESES USING THE CASTING PATTERNS | 0 |
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SU1703084A1 |
