Regulating the Rate of Hardening of Self-Hardening Sodium Silicate Coatings in Investment Casting

摘要

A method of making shell molds in investment casting using self-hardening sodium silicate coatings has been developed. The method allows reducing the time of shell farming, as the step of hardening by processing in chemical solutions or using a gas hardener has been eliminated Roth synthetic Ca_2Si and ferrochromium slag -- a waste material from ferrochromium production -- are used as a hardener Also, a method of regulating the bench life of self-hardening suspensions by changing their temperature has been developed.