Title:
マルテンサイト系ステンレス鋼板およびその製造方法並びにばね部材
Document Type and Number:
Japanese Patent JP7049142
Kind Code:
B2
Abstract:
As a high strength martensitic stainless steel sheet excellent in delayed fracture resistance, there is provided a martensitic stainless steel sheet having: a chemical composition containing, in terms of percentage by mass, from 0.10 to 0.15% of C, from 0.05 to 0.80% of Si, from 0.05 to 2.00% of Mn, 0.040% or less of P, 0.003% or less of S, from 0.05 to 0.50% of Ni, from 11.0 to 15.0% of Cr, from 0.02 to 0.50% of Cu, from 0.005 to 0.06% of N, from 0.001 to 0.20% of Al, from 0 to 1.00% of Mo, from 0 to 0.50% of V, from 0 to 0.01% of B, the balance of Fe and unavoidable impurities, and having an M value = 420C - 11.5Si + 7Mn + 23Ni - 11.5Cr - 12Mo - 10V + 9Cu - 52Al + 470N + 189 of 100 or more; a number density of a carbonitride having a circle equivalent diameter of 1.0 µm or more of 15.0 or less per 0.01 mm2; and a 0.2% yield strength of 1,100 N/mm2 or more.
Inventors:
Taichiro Mizoguchi
Hiroyasu Matsubayashi
Katsuyuki Shiotsuki
Hiroyasu Matsubayashi
Katsuyuki Shiotsuki
Application Number:
JP2018047508A
Publication Date:
April 06, 2022
Filing Date:
March 15, 2018
Export Citation:
Assignee:
Nippon Steel Stainless Steel Corporation
International Classes:
C22C38/00; C21D9/46; C22C38/58
Domestic Patent References:
| JP2000234150A | ||||
| JP2000256802A | ||||
| JP2003089851A | ||||
| JP2004244691A | ||||
| JP63293142A |
Foreign References:
| WO2012157680A1 | ||||
| CN104532129A |
Attorney, Agent or Firm:
Komatsu Takashi
Previous Patent: Package for electronic components and its manufacturing method
Next Patent: Flat alkaline primary battery
Next Patent: Flat alkaline primary battery