Back to results
US 12,098,449 B2Granted
Alloyed steel powder for powder metallurgy and iron-based mixed powder for powder metallurgy
AssigneeJfe Steel Corporation
InventorsTakuya Takashita, Nao Nasu, Akio Kobayashi
Life of this patent
Estimating the term…
Abstract
Disclosed is an alloyed steel powder for powder metallurgy from which sintered parts that do not contain expensive Ni, or Cr or Mn susceptible to oxidation, that have excellent compressibility, and that have high strength in an as-sintered state can be obtained. The alloyed steel powder for powder metallurgy has: a chemical composition containing Cu: 1.0 mass % to 8.0 mass %, with the balance being Fe and inevitable impurities; and constituent particles in which Cu is present in an precipitated state with an average particle size of 10 nm or more.
Claims3
An alloy powder for powder metallurgy, comprising
- a chemical composition consisting of Cu:
- 1.0 mass % to 8.0 mass % and Mo:
- 1.0 mass % to 2.0 mass %, with the balance being Fe and inevitable impurities, where the contents of C, O, N, S, Mn, and Cr as the inevitable impurities satisfy the following conditions,
- C:
- 0.02 mass % or less, O:
- 0.3 mass % or less, N:
- 0.004 mass % or less, S:0.03 mass % or less, Mn:
- 0.5 mass % or less, and Cr:
- 0.2 mass % or less;
- and
- constituent particles in which Cu is present in a precipitated state with an average particle size of 22 nm or more.
8 more elements
Dependencies are inferred from the claim text.