Title:
METHOD FOR MANUFACTURING ALLOY STEEL POWDER FOR SINTERED MEMBER RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2017/051541
Kind Code:
A1
Abstract:
Provided is a method by which alloy steel powder containing easily oxidizable Cr or Mo as an alloying element is efficiently and stably manufactured via water atomizing. A method for manufacturing alloy steel powder for a sintered member material having a water atomizing step of water atomizing molten steel to obtain a water-atomized iron-base powder, and a heat treatment step for subjecting the water-atomized iron-base powder to a reducing heat treatment and obtaining an alloy steel powder; the alloy steel powder containing 0.3‒3.5% of Cr and more than 0.08% and no more than 1.0% of Mn (percentage amounts expressing mass) as the alloying element, and otherwise comprising Fe and inevitable impurities, the amount of C [C] (mass%) in the molten steel and the amounts of Cr [Cr], Mn [Mn], and V [V] (mass%) in the molten steel satisfying the relationship shown in formula (1). 0.07≦[C]/{[Cr]2/3+2([Mn]+[V])≦0.23 ... (1)
Inventors:
NAKAMURA NAOMICHI (JP)
KOBAYASHI AKIO (JP)
UNAMI SHIGERU (JP)
KOBAYASHI AKIO (JP)
UNAMI SHIGERU (JP)
Application Number:
PCT/JP2016/004324
Publication Date:
March 30, 2017
Filing Date:
September 23, 2016
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B22F9/08; B22F1/00; B22F1/142; C22C38/00; C22C38/18; C22C38/60
Foreign References:
| JP2011508091A | 2011-03-10 | |||
| JPH06306403A | 1994-11-01 | |||
| EP0108175A1 | 1984-05-16 |
Attorney, Agent or Firm:
SUGIMURA, Kenji (JP)
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