Iron-based sintered alloy and method for producing same
AssigneeThe Japan Steel Works, Ltd.
InventorsYusuke Watanabe, Kakeru Kusada
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Abstract
Produced is an iron-based sintered alloy in which hard particles derived from a titanium carbide powder are dispersed in the form of islands in a matrix comprising a two phase structure of austenite+martensite. The iron-based sintered alloy is obtained by mixing the titanium carbide powder, a Cr powder, a Mo powder, a Co powder, a Fe powder and a powder of Al, Ti or Nb so as to obtain a mixed powder that contains, in terms of mass %, 20-35% of titanium carbide, 3.0-12.0% of Cr, 3.0-8.0% of Mo, 8.0-23% of Ni, 0.6-4.5% of Co and 0.6-1.0% of Al, Ti or Nb, with the balance Fe, and then subjecting the mixed powder to cold isostatic compression molding, vacuum sintering and solution treatment.
Claims6
A method for producing an iron-based sintered alloy, the method comprising:
- mixing a titanium carbide powder, a Cr powder, a Mo powder, a Ni powder, a Co powder, a Fe powder and a powder of any one of Al, Ti, and Nb;
- and
- subjecting a resulting mixed powder containing, in terms of % by mass, titanium carbide:
- 20% to 35%, Cr:
- 3.0% to 12.0%, Mo:
- 3.0% to 8.0%, Ni:
- 8.0% to 23%, Co:
- 0.6% to 4.5%, and any one of Al, Ti or Nb:
- 0.6% to 1.0%, with the balance Fe, to cold isostatic pressing molding, vacuum sintering, and a solution treatment, to produce an iron-based sintered alloy in which hard particles derived from the titanium carbide powder are dispersed in an island form in a matrix having a two-phase structure of austenite and martensite.
An iron-based sintered alloy, wherein hard particles comprising titanium carbide, molybdenum carbide, and/or a composite carbide of titanium and molybdenum are dispersed in an island form in a matrix having a two-phase structure of austenite and martensite,
- wherein the iron-based sintered alloy contains, in terms of % by mass, titanium carbide:
- 20% to 35%, Cr:
- 3.0% to 12.0%, Mo:
- 3.0% to 8.0%, Ni:
- 8.0% to 23%, Co:
- 0.6% to 4.5%, and any one of Al, Ti or Nb:
- 0.6% to 1.0%, with the balance Fe.
Dependencies are inferred from the claim text.