Title:
MARTENSITE-BASED FREE-CUTTING STAINLESS STEEL EXCELLENT IN PRECISION CUTTING
Document Type and Number:
Japanese Patent JP2022123411
Kind Code:
A
Abstract:
To provide a martensite-based free-cutting stainless steel having cutting surface property of excellent flatness and tool life during precision cutting.SOLUTION: Martensitic free-cutting stainless steel of the present invention has chemical components made of, in mass%, C: 0.10 to 0.70%, Si: 0.1 to 2.0%, Mn: 0.1 to 3.0%, S: 0.02 or more and less than 0.15%, P: 0.10% or less, Cr: 10.5-17.0%, B: 0.001-0.01%, N: 0.02-0.15%, Al: 0.008% or less, O: 0.015% or less, and the balance of a chemical composition consisting of Fe and impurities, and the amount of solid solution N is 0.01 to 0.05%, There are 20 or more BN-based intermetallic compounds with a size of 0.5 μm or less per 100 μm2 and the hardness is 400 Hv or less.SELECTED DRAWING: None
Inventors:
TAKANO KOJI
OKA YOSHIHIRO
TENTO MASAYUKI
TOJO MASAYUKI
OKA YOSHIHIRO
TENTO MASAYUKI
TOJO MASAYUKI
Application Number:
JP2021020730A
Publication Date:
August 24, 2022
Filing Date:
February 12, 2021
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP
International Classes:
C22C38/00; C21D8/06; C22C38/60
Attorney, Agent or Firm:
Aoki Atsushi
Shinji Mihashi
Ritsuo Fukuchi
Saito Manabu
Kenji Kimura
Shinji Mihashi
Ritsuo Fukuchi
Saito Manabu
Kenji Kimura
Previous Patent: Information processing device and information processing system
Next Patent: Welding equipment and method and program
Next Patent: Welding equipment and method and program