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Castings of metallic alloys with improved surface quality, structural integrity and mechanical properties fabricated in titanium carbide coated graphite molds under vacuum
Castings of metallic alloys with improved surface quality, structural integrity and mechanical properties fabricated in titanium carbide coated graphite molds under vacuum
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机译:在真空下由碳化钛涂层的石墨模具制造的具有改善的表面质量,结构完整性和机械性能的金属合金铸件
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摘要
Molds are fabricated having a substrate of high density, high strength ultrafine grained isotropic graphite, and having a mold cavity coated with titanium carbide. The molds may be made by making the substrate (main body) of high density, high strength ultrafine grained isotropic graphite, by, for example, isostatic or vibrational molding, machining the substrate to form the mold cavity, and coating the mold cavity with titanium carbide via either chemical deposition or plasma assisted chemical vapor deposition, magnetron sputtering or sputtering. The molds may be used to make various metallic alloys such as nickel, cobalt and iron based superalloys, stainless steel alloys, titanium alloys and titanium aluminide alloys into engineering components by melting the alloys in a vacuum or under a low partial pressure of inert gas and subsequently casting the melt in the graphite molds under vacuum or low partial pressure of inert gas.
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