Title:
STEEL FOR NITRIDING HAVING EXCELLENT COLD FORGING PROPERTY AND COLD FORGED NITRIDED COMPONENT
Document Type and Number:
Japanese Patent JP2023144640
Kind Code:
A
Abstract:
To provide a steel materials for cold forging and nitriding that have an excellent balance between processability during cold forging and nitriding property.SOLUTION: Provided is a steel for nitriding, which is a steel that has, in mass%, C:0.20 to 0.45%, Si:0.1 to 0.4%, Mn:0.2 to 1.0%, Cr:1.50 to 2.80%, Mo:0.03 to 0.30%, Al:0.005 to 0.300%, N:0.004 to 0.030, and V: 0.08 to 0.30%, and the balance is Fe and unavoidable impurities, and furthermore, among the unavoidable impurities, P:0.030% or less, S:0.030% or less, and the steel for nitriding has a hardness of 84HRB or less in Rockwell hardness after being subjected to softening heat treatment by being held at 760 to 850°C for 5 to 10 hours and cooled from the holding temperature to 600 to 700°C at 15 to 25°C/h.SELECTED DRAWING: Figure 1
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Inventors:
IDEGUCHI TAKAHIRO
TOKOKAGE NORIMASA
TOKOKAGE NORIMASA
Application Number:
JP2022051721A
Publication Date:
October 11, 2023
Filing Date:
March 28, 2022
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
C22C38/00; C21D1/06; C21D1/32; C21D7/02; C22C38/24; C22C38/32; C23C8/26
Attorney, Agent or Firm:
Hironori Yokoi
Kenji Yokoi
Satoshi Yokoi
Kenji Yokoi
Satoshi Yokoi