Machine Casting of Ferrous Alloys
Final technical rept. 1 Feb 1973-30 Jun 1974
GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY NY
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A series of iron, nickel, and cobalt base alloys have been permanent mold cast under varying conditions to evaluate techniques for improving the integrity of die castings. By appropriate control of heat flow, it is possible to achieve permanent mold casting with mechanical properties equivalent to investment castings. Liquid-solid slurries were cast Rheocasting to evaluate casting properties and opportunities for enhanced mold life with a reduced temperature casting process. Casting properties are acceptable. It is not clear that there is enhanced mold life by this process. Stainless steel alloys were die cast at 34 - 105C superheats. These die castings indicate that there is sufficient heat loss in the shot sleeve and runner systems that the metal arrives in the die cavity partly solid.
- Fabrication Metallurgy