Title:
機械構造用鋼、機械構造部品およびその製造方法
Document Type and Number:
Japanese Patent JP7410392
Kind Code:
B2
Abstract:
To secure machinability improvement and hot ductility by In inclusion, by focusing to polishing of elementary material for machine structural parts after high frequency hardening and tempering.SOLUTION: In order to secure necessary hot ductility, it is important to limit the S+In total content in a range shown in Formula 1. Furthermore, by inclusion of Si and In, the reaction with a tool is suppressed to improve the machinability to be able to reduce the tool wear. In order to sufficiently obtain the effect, the ratio of the In content to the Si content is limited to a range shown by Formula 2. Furthermore, Formula 3 which is an index for additively evaluating by weighting the degree of influence of each element on the degree influencing on the tempering softening resistance after high frequency hardening and tempering may be within a certain range. [S]+[In]≤0.230 (Formula 1) [In]/[Si]≥0.15 (Formula 2), 33+31×[C]+4.5×[Si]+1.5×[Mn]+2.4×[Cr]≥53.0 (Formula 3)SELECTED DRAWING: None
Inventors:
Toshiharu Maso
Tatsuya Iwasaki
Tatsuya Iwasaki
Application Number:
JP2020051596A
Publication Date:
January 10, 2024
Filing Date:
March 23, 2020
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; B23B1/00; C21D1/10; C21D6/00; C22C38/60
Domestic Patent References:
| JP7054099A | ||||
| JP2001131684A | ||||
| JP62211351A | ||||
| JP7090379A | ||||
| JP2017082299A |
Foreign References:
| WO2020050053A1 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mihashi
Ritsuo Fukuchi
Manabu Saito
Shinji Mihashi
Ritsuo Fukuchi
Manabu Saito