Iron based sintered sliding member and method for producing same
AssigneeHitachi Chemical Company, Ltd.
InventorsDaisuke FUKAE, Hideaki KAWATA
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Abstract
An iron-based sintered sliding member is provided in which solid lubricating agent is dispersed uniformly inside of powder particles in addition to inside of pores and particle interfaces of the powder, the agent is strongly fixed, and sliding properties and mechanical strength are superior. The iron-based sintered sliding member contains S: 0.2 to 3.24 mass %, Cu: 3 to 10 mass %, remainder: Fe and inevitable impurities, as an overall composition; the metallic structure includes a base in which sulfide particles are dispersed, and pores; the base is a ferrite phase or a ferrite phase in which copper phase is dispersed; and the sulfide particles are dispersed at a ratio of 0.8 to 15.0 vol % versus the base.
Claims18
An iron-based sintered sliding member comprising:
- S:
- 0.2 to 3.24 mass %,
- Cu:
- 3 to 10 mass %,
- remainder:
- Fe and inevitable impurities, as an overall composition,
- wherein the metallic structure comprises a base in which sulfide particles are dispersed, and pores,
- wherein the base is a ferrite phase or a ferrite phase in which a copper phase is dispersed, and
- wherein the sulfide particles are dispersed at a ratio of 0.8 to 15.0 vol % versus the base.
An iron-based sintered sliding member comprising:
- S:
- 0.2 to 3.24 mass %,
- Cu:
- 3 to 10 mass %,
- C:
- 0.2 to 2 mass %,
- remainder:
- Fe and inevitable impurities, as an overall composition,
- wherein the metallic structure comprises a base in which sulfide particles are dispersed, and pores,
- the C is added in the base,
- wherein the base is constructed by a structure at least one of ferrite, pearlite and bainite or a mixed structure of these, or at least one of ferrite pearlite and bainite or a mixed structure of these in which the copper phase is dispersed, and
- wherein the sulfide particles are dispersed at a ratio of 0.8 to 15.0 vol % versus the base.
An iron-based sintered sliding member comprising:
- S:
- 0.2 to 3.24 mass %,
- Cu:
- 3 to 10 mass %,
- C:
- 0.2 to 3 mass %,
- remainder:
- Fe and inevitable impurities, as an overall composition,
- wherein the metallic structure comprises a base in which sulfide particles are dispersed, and pores,
- part of or all of the C is dispersed in the pores as graphite,
- wherein the base is constructed by a structure of at least one of ferrite, pearlite and bainite or a mixed structure of these, or at least one of ferrite, pearlite and bainite or a mixed structure of these in which copper phase is dispersed, and
- wherein the sulfide particles are dispersed at a ratio of 0.8 to 15.0 vol % versus the base.
A method for production of the iron-based sintered sliding member, comprising steps of:
- preparing a raw material powder by adding at least one kind of metallic sulfide powder selected from iron sulfide powder, copper sulfide powder, molybdenum disulfide powder and nickel sulfide powder to iron powder so that an amount of S in the raw material powder is 0.2 to 3.24 mass %,
- compacting and molding the raw material powder in a mold, and
- sintering the compact at 1090 to 1300° C. under non-oxidizing atmosphere.
Dependencies are inferred from the claim text.