Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SURFACE-TREATED STEEL SHEET EXCELLING IN OIL WET SPREAD RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2009/017249
Kind Code:
A1
Abstract:
A surface-treated steel sheet comprising a galvanized steel sheet provided on its surface with a rustproof coating so as to exhibit a contact angle of lubricant of 51 to 69 mm2/s kinematic viscosity at 40°C and 11.1 to 14.9 mm2/s kinematic viscosity at 100°C of 10° or greater on at least the surface (A) of the rustproof coating applied to one major surface side of the steel sheet (providing that the contact angle is one exhibited at a steel sheet surface temperature of 30°C 30 seconds later than the formation of lubricant droplet on the surface of the rustproof coating). Preferably, on the surface-treated steel sheet, the contact angle of the lubricant on the rustproof coating surface (A) after plastic working of the surface-treated steel sheet at a draw ratio of 20% is 10° or greater. Still preferably, on the rustproof coating surface (A) and the rustproof coating surface (A) after plastic working of the surface-treated steel sheet at a draw ratio of 20%, the cracking density is 200 cracks or less per 100 μm. This surface-treated steel sheet excels in oil wet spread resistance, and in parts equipped with a bearing holder part, would ensure effective inhibition of lubricant ooze-out such as to cause lubricant shortage at the bearing part.

More Like This:
WO/2002/000958DECORATIVE ARTICLE HAVING WHITE FILM AND PRODUCTION METHOD THEREFOR
JP5655717A method for producing a cold-rolled steel sheet having excellent press formability, chemical conversion processability, and corrosion resistance after painting.
JP2005179181COMPOSITE HAVING VELOCITY BARRIER LAYER
Inventors:
OKAI KAZUHISA (JP)
HAMADA ETSUO (JP)
MATSUZAKI AKIRA (JP)
ANDO SATORU (JP)
Application Number:
PCT/JP2008/064074
Publication Date:
February 05, 2009
Filing Date:
July 30, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JFE STEEL CORP (JP)
OKAI KAZUHISA (JP)
HAMADA ETSUO (JP)
MATSUZAKI AKIRA (JP)
ANDO SATORU (JP)
International Classes:
C23C28/00; B05D5/06; B32B15/08; H02K5/02; H02K5/16
Foreign References:
JP2003003278A2003-01-08
JP2006129558A2006-05-18
JP2004202534A2004-07-22
JP2004286080A2004-10-14
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-ResearchCorporation 7th Floor, Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: GEAR MACHINING APPARATUS AND MACHINING METHOD

Next Patent: METHODS FOR PRODUCING ARIPIPRAZOLE SUSPENSION AND FREEZE-DRIED FORMULATION