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AssigneeKeystone Investment Corporation
InventorJohn C. Kosco
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A method of forming a powder metal material or article includes the steps of molding a compact from a metallurgical powder, and then sintering the compact. The metallurgical powder may include at least one of a stainless steel powder and a low-chromium steel-base powder, and about 0.5 to about 15 weight percent of glass powder. Alternatively, the metallurgical powder may include at least one of a stainless steel powder and a low-chromium steel-base powder, about 3 to about 15 weight percent molybdenum, and about 1 to about 15 weight percent of nickel-base alloy powder. The present invention also is directed to metallurgical powders useful in and materials and articles made by the methods of the present invention. Such articles include, but are not limited to, valve guides for internal combustion engine EGR systems, valve seats, exhaust system components, combustion chambers, other combustion engine parts subjected to high temperature, and chemical industry valve and corrosion parts.
A method of forming a powder metal article, the method comprising:
A metallurgical powder comprising:
A powder metal article made by a method comprising:
A powder metal article comprising 0.5 to 15 weight percent of glass particles dispersed in a matrix including at least one of stainless steel and chromium alloy.
A powder metal material comprising:
A composite material comprising:
A method of forming a powder metal article, the method comprising:
A metallurgical powder comprising:
A powder metal article made by a method comprising:
Dependencies are inferred from the claim text.