Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ROLLER FOR WELDING PIPE MILL
Document Type and Number:
WIPO Patent Application WO/2008/061452
Kind Code:
A1
Abstract:
A high Cr casting iron or steel roller is applicable to a mill for rolling welded pipe. The composition of the high Cr casting iron roller contains (by wt%): 1.8-2.8% C, ≤1.0% Si, ≤1.0% Mn, ≤0.05% P, ≤0.05% S, 12-22% Cr, 0.5-3.0% Ni, 0.8-3.0% Mo, 0-0.3% Ti, 0-1.0% V, 0-1.0% Cu, 0.01-0.5% RE, and balance Fe. The composition of the high Cr casting iron roller contains (by wt%): 0.7-1.2% C, ≤1.0% Si, ≤1.0% Mn, ≤0.05% P, ≤0.05% S, 8-12% Cr, 0.5-2.0% Ni, 0.8-3.0% Mo, 0-0.3% Ti, 0-1.0% V, 0-0.8% W, 0.01-0.5% RE, and balance Fe. With the roller for welding pipe mill, as being producing by casting, the material organization of the roller is consistent throughout the roller, toughness and wear resistance are very high, thereby having a service life of 2-5 times more than a forged roller.

Inventors:
YUAN HOUZHI (CN)
ZHANG NING (CN)
LIU XINGYI (CN)
WANG PING (CN)
Application Number:
PCT/CN2007/003299
Publication Date:
May 29, 2008
Filing Date:
November 21, 2007
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
YUAN HOUZHI (CN)
ZHANG NING (CN)
LIU XINGYI (CN)
WANG PING (CN)
International Classes:
C22C38/18; B21B27/00; C22C38/44
Foreign References:
CN1080666A1994-01-12
CN85102865A1987-03-04
JP2001181795A2001-07-03
CN1854328A2006-11-01
CN1861829A2006-11-15
Other References:
ZHAO W. ET AL.: "Research for application of rare earth in high Cr casting iron roller", JOURNAL OF WUHAN ENGINEERING INSTITUTE, vol. 17, no. 3, September 2005 (2005-09-01), pages 4 - 7
Attorney, Agent or Firm:
MING & SURE INTELLECTUAL PROPERTY OFFICE (5th Floor Haohai Building, No.7, 5th Street,Shangdi,Haidian District, Beijing 5, CN)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: METHOD AND SYSTEM FOR TRANSMITTING DATA IN TDM MODE

Next Patent: A CASTING INGOT OF VACUUM FINE EQUIAXED GRAIN STRUCTURE