Title:
COATING FILM, HOT-FORMING DIE, AND HOT FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/038556
Kind Code:
A1
Abstract:
Provided is a coating film 12 which is formed as an anti-wear layer on a hot-forming die 1 used for hot molding of a steel sheet 10. The coating film 12 is characterized by comprising tungsten carbide, and 3-15 wt% of residual cobalt. The hot-forming die 1 is intended to be used in hot forming of the steel sheet 10, and is provided with: a base material 11 that has a forming surface 11A; and the coating film 12 formed on the forming surface 11A. The hot forming method comprises a step for heating the steel sheet 10, and a step for forming the heated steel sheet 10 by using the hot-forming die 1.
Inventors:
YAMAMOTO KENJI
Application Number:
PCT/JP2016/074500
Publication Date:
March 09, 2017
Filing Date:
August 23, 2016
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B21D37/01; B21D22/20; B21D24/00; B21D37/20
Foreign References:
| JP2001025843A | 2001-01-30 | |||
| JP2014145114A | 2014-08-14 | |||
| JPH1081949A | 1998-03-31 | |||
| JPH0537963U | 1993-05-21 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
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