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US 11,884,996 B2Granted
Iron-based alloy sintered body and iron-based mixed powder for powder metallurgy
AssigneeJfe Steel Corporation
InventorsNao Nasu, Takuya Takashita, Akio Kobayashi
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Abstract
Provided is an iron-based alloy sintered body having a tensile strength of 800 MPa or more, excellent machinability, a microstructure with an average Vickers hardness of 300 Hv or more and 900 Hv or less and a standard deviation of Vickers hardness of 200 Hv or less, and an average pore circularity of 0.30 or more.
Claims12
An iron-based alloy sintered body comprising:
- a chemical composition containing
- Cu:
- 1.8 mass % or more and 10.2 mass % or less,
- Mo:
- 2.0 mass % or less, and
- C:
- 0.2 mass % or more and 1.2 mass % or less,
- with the balance being Fe and inevitable impurities, and
- a microstructure having an average Vickers hardness of 300 Hv or more and 900 Hv or less and a standard deviation of Vickers hardness of 200 Hv or less,
- wherein an average pore circularity is 0.30 or more.”
7 more elements
An iron-based mixed powder for powder metallurgy comprising:
- a pre-alloyed steel powder obtained by pre-alloying Cu or Mo and Cu;
- a Cu powder;
- and
- a graphite powder,
- wherein the iron-based mixed powder for powder metallurgy has a chemical composition containing
- Cu:
- 1.8 mass % or more and 10.2 mass % or less,
- Mo:
- 2.0 mass % or less, and
- C:
- 0.2 mass % or more and 1.2 mass % or less,
- with the balance being Fe and inevitable impurities, and
- the Cu powder is contained in an amount of 0.3 mass % or more.
10 more elements
An iron-based mixed powder for powder metallurgy comprising:
- a pre-alloyed steel powder obtained by pre-alloying Mo and Cu;
- a Cu powder;
- and
- a graphite powder,
- wherein the iron-based mixed powder for powder metallurgy has a chemical composition containing
- Cu:
- 1.8 mass % or more and 10.2 mass % or less,
- Mo:
- 0.5 mass % or more and 2.0 mass % or less, and
- C:
- 0.2 mass % or more and 1.2 mass % or less,
- with the balance being Fe and inevitable impurities, and
- the Cu powder is contained in an amount of 0.3 mass % or more.
10 more elements
Dependencies are inferred from the claim text.