Title:
優れた熱間加工性を持つ高マンガン二相ステンレス鋼及びその製造方法
Document Type and Number:
Japanese Patent JP4031992
Kind Code:
B2
Abstract:
A high manganese duplex stainless steel with excellent hot workability, comprising (in weight %): less than 0.1% of C; 0.05-2.2% of Si; 2.1-7.8% of Mn; 20-29% of Cr; 3.0-9.5% of Ni; 0.08-0.5% of N; less than 5.0% of Mo and 1.2-8% of W, alone or composite; the balance Fe and inevitable impurities; and a method for manufacturing the duplex stainless steel, comprising the steps of: solution heating the duplex stainless steel composition at a temperature of 1,050 to 1,250° C., hot working at a starting temperature of 1,130 to 1,280° C. and then ending at a temperature greater than 1,000° C., and then cooling within the temperature range from 1,000 to 700° C. at a cooling rate of more than 3° C./min. The duplex stainless steel exhibits a reduction in area of more than 50% at 1,050° C., and possesses a yield strength of more than 400 MPa, and a corrosion rate of less than 0.36 mm/year, after solution heating.
Inventors:
Jean Jaeyoung
Corporate
Corporate
Application Number:
JP2002585688A
Publication Date:
January 09, 2008
Filing Date:
April 26, 2002
Export Citation:
Assignee:
Research Institute of Industrial Science and Technology
International Classes:
C21D8/00; C22C38/00; C21D6/00; C22C38/42; C22C38/44; C22C38/58; C21D7/13; C21D8/02
Domestic Patent References:
| JP8013094A | ||||
| JP2003503596A | ||||
| JP9302446A | ||||
| JP9031604A | ||||
| JP8041600A | ||||
| JP8511829A | ||||
| JP4072013A | ||||
| JP61023713A | ||||
| JP61130461A | ||||
| JP11050143A | ||||
| JP6041697A | ||||
| JP10060598A |
Foreign References:
| WO2001000898A1 |
Attorney, Agent or Firm:
Mikio Yoshimiya