Title:
HEARTH ROLL FOR CONTINUOUS ANNEALING FURNACES, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2016/059736
Kind Code:
A1
Abstract:
[Problem] The invention of the present application provides a hearth roll for heat treatment furnaces, which has excellent build-up resistance, has a hexavalent-chromium-free thermal spray coating film formed on the roll surface thereof and is safe for the environment.
[Solution] A method for manufacturing a hearth roll for continuous annealing furnaces, said method comprising: a first step of applying an aqueous solution containing chromium phosphate onto a thermal spray coating film formed on the roll surface of a hearth roll or impregnating the thermal spray coating film with the aqueous solution; and a second step of burning the hearth roll.
Inventors:
KURISU YASUSHI (JP)
LI YU (JP)
LI YU (JP)
Application Number:
PCT/JP2015/003255
Publication Date:
April 21, 2016
Filing Date:
June 29, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
NIPPON STEEL & SUMIKIN HARDFACING CO LTD (JP)
NIPPON STEEL & SUMIKIN HARDFACING CO LTD (JP)
International Classes:
C23C4/18; C21D1/00; C21D9/56; C23C22/30; C23C22/33; F16C13/00
Foreign References:
| JPH0375383A | 1991-03-29 | |||
| JP2003268562A | 2003-09-25 | |||
| JP2003293156A | 2003-10-15 | |||
| JP2006342398A | 2006-12-21 |
Attorney, Agent or Firm:
MIZUNO, Katsufumi et al. (JP)
Katsufumi Mizuno (JP)
Katsufumi Mizuno (JP)
Download PDF:
Previous Patent: THERAPEUTIC MATERIAL FOR SKIN ULCER
Next Patent: SCREEN GENERATION DEVICE, SCREEN GENERATION SYSTEM, AND SCREEN GENERATION METHOD
Next Patent: SCREEN GENERATION DEVICE, SCREEN GENERATION SYSTEM, AND SCREEN GENERATION METHOD