Title:
冷間圧延されたマルエージング鋼の帯鋼または帯状に切断される鋼片を製造するための方法
Document Type and Number:
Japanese Patent JP4278378
Kind Code:
B2
Abstract:
A maraging steel strip or part and process for manufacture of a strip or of a part cut out of a strip of cold-rolled maraging steel and hardened by a hardening heat treatment. In the process, before the hardening heat treatment is performed, the strip or the part is subjected to cold plastic deformation with a degree of working greater than 30% and the strip or the part is subjected to recrystallization annealing in order to obtain a fine-grained structure with ASTM index higher than 8. The composition by weight of the maraging steel is: 12%<=Ni<=24.5%; 2.5%<=Mo<=12%; 4.17%<=Co<=20%, Al %<=0.15%; Ti<=0.1%; N<=0.003%; Si<=0.1%; Mn<=0.1%; C<=0.005%; S<=0.001%; P<=0.005%; H<=0.0003%; O<=0.001%; iron and impurities resulting from smelting, the chemical composition also satisfying the relationships: 20%<=Ni+Mo<=27%; 50<=CoxMo<=200; TixN<=2X10<-4>.
Inventors:
Kuchu, lucian
Application Number:
JP2002543031A
Publication Date:
June 10, 2009
Filing Date:
November 16, 2001
Export Citation:
Assignee:
Amphi Eugene Precision
International Classes:
B21B3/02; C21D9/46; C21D6/02; C21D8/02; C22C38/00; C22C38/10; C22C38/12; C22C38/14
Domestic Patent References:
| JP1142021A | ||||
| JP1142052A | ||||
| JP5008255B2 | ||||
| JP2000345302A | ||||
| JP2001240944A | ||||
| JP2001240943A | ||||
| JP63026345A | ||||
| JP62192528A |
Attorney, Agent or Firm:
Keiichi Ota