EP 1715074 A1 20061025 - Fe BASE ALLOY HAVING LAYER AND METHOD FOR PRODUCTION THEREOF
Title (en)
Fe BASE ALLOY HAVING LAYER AND METHOD FOR PRODUCTION THEREOF
Title (de)
LEGIERUNG AUF FE-BASIS MIT SCHICHT UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ALLIAGE A BASE DE Fe DOTE D'UNE COUCHE ET SON PROCEDE DE FABRICATION
Publication
Application
Priority
- JP 2005001581 W 20050203
- JP 2004026374 A 20040203
- JP 2004026672 A 20040203
- JP 2004193492 A 20040630
Abstract (en)
On respective surfaces of the work pressing site and the body part of the portion (16) having a less diameter of a preliminary Canned article (32) comprising SKH51 (a Fe base alloy), a powder of a material containing an element enhancing the hardness of SKH51 and a powder of a material containing an element being contained in SKH51 and not enhancing the hardness of SKH51 are applied respectively. By the heat treatment of the preliminary formed article (32) after the above application, W and the like having been contained in an application agent (34a) is diffused into the surface side in the work pressing site, whereas, in the body part of the portion (16) having a less diameter, W and the like having been contained in SKH51 is diffused into the surface side. As a result, a diffusion layer (20), wherein hardness increases as the distance from the surface decreases, is formed inside the work pressing site, and simultaneously, a concentration change portion (22), wherein toughness improves as the distance from the surface decreases, is formed in the body part of the portion (16) having a less diameter
IPC 8 full level
C23C 10/30 (2006.01); C21D 1/06 (2006.01); C23C 10/32 (2006.01); C23C 10/52 (2006.01); C23C 12/00 (2006.01); C23C 12/02 (2006.01)
CPC (source: EP)
C23C 10/30 (2013.01); C23C 10/52 (2013.01); C23C 12/02 (2013.01); C21D 1/06 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1715074 A1 20061025; EP 1715074 A4 20090819; WO 2005075699 A1 20050818
DOCDB simple family (application)
EP 05709674 A 20050203; JP 2005001581 W 20050203