Title:
SIMPLE EVALUATION METHOD OF HYDROGEN-CRACK RESISTING CHARACTERISTIC
Document Type and Number:
Japanese Patent JP2008279485
Kind Code:
A
Abstract:
To provide a simple evaluation method of delayed fracture resisting characteristic of a steel sheet for automotive use which is used for press working.
In this simple evaluation method of hydrogen-crack resistance characteristic, a sheared section rate is used as a evaluation parameter of a hydrogen-crack resistance in the sheared section of the steel sheet. Where, the sheared section rate = the length (a+b) in the thickness direction in the sheared section/the thickness (t)100(%).
Inventors:
SUZUKI TAMAKI
OKA MASAHARU
SATOU HIROAKI
MATSUNO TAKASHI
SETO KOJI
OKA MASAHARU
SATOU HIROAKI
MATSUNO TAKASHI
SETO KOJI
Application Number:
JP2007126622A
Publication Date:
November 20, 2008
Filing Date:
May 11, 2007
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B21D28/00
Domestic Patent References:
| JP2006224151A | 2006-08-31 | |||
| JP2000017400A | 2000-01-18 | |||
| JPH11330339A | 1999-11-30 | |||
| JP2005029140A | 2005-02-03 |
Attorney, Agent or Firm:
Mizuno Katsufumi
Masayuki Kishida
Hiroshin Takano
Masayuki Kishida
Hiroshin Takano