FIELD: metallurgy.
SUBSTANCE: investment contains following components wt %: chrome-bearing material - basis, quartz-bearing material 28-32, black - 0.5-1. In the capacity of chrome-bearing material it is used enriched chrome-bearing material, in which content of admixtures of oxides is not more than, wt %: MgO 13.1, SiO2 1, CaO 0.1.
EFFECT: there is provided fluidity increasing of investment, reduction of bridging and sintering ability of mixture, unimpeded precipitation from ladle channel.
1 ex
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