Sintered cobalt-based alloys
AssigneeFederal-Mogul Sintered Products Limited
InventorsIain Robert Whitaker, Richard Jameson Pavey
Life of this patent
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Abstract
A sintered material and a method for the production thereof is described. The material comprises an alloy selected from one of the groups having a composition comprising in weight %: either Cr 5-30/Mo 0-15/Ni 0-25/W 0-15/C 0-5/Si 0-5/Fe 0-5/Mn 0-5/others 10 max/Co balance, or Cr 10-20/Mo 0-15/Co 0-20/W 0-5/Fe 0-20/Al 0-5/Ti 0-5/others 15 max/Ni balance; said alloy having incorporated therein from 3-15 weight % of Sn; and optionally from 1-6 weight % of a solid lubricant material.
Claims18
A sintered material comprising one or more cobalt-based alloys each having a composition in weight %:
- Cr 5-30/Mo 0-15/Ni 0-25/W 0-15/C 0-5/Si 0-5/B 0-5 Fe 0-5/Mn 0-5/total others 10 max/Co balance, from 3-15 weight % of Sn, from 1-6 weight % of a solid lubricant material and having a porosity of up to 10 vol %.
A method of making a sintered material having a porosity of up to 10 vol. %, comprising the steps of:
- mixing together a powder which comprises one or more cobalt-based alloys each having a composition in weight %:
- Cr 5-30/Mo 0-15/Ni 0-25/W 0-15/C 0-5/Si 0-5/B 0-5 Fe 0-5/Mn 0-5/total others 10 max/Co balance, from 3-15 weight % of the material of Sn powder and with solid lubricant powder providing 1-6 weight % of the material;
- compacting the powder mixture to form a green compact;
- and sintering said green compact in a controlled environment.
A bearing fabricated of a compacted and sintered material, comprising:
- one or more cobalt-baaed alloys each having a composition in weight %:
- Cr 5-30/Mo 0-15/Ni 0-25/W 0-15/C 0-5/Si 0-5/B 0-5/Fe 0-5/total others 10 max/Co balance, from 3-15 weight % of Sn, from 1-6 weight % of a solid lubricant material and having a porosity of up to 10 vol %.
Dependencies are inferred from the claim text.