Title:
METAL SHEET HAVING LOW FRICTION COEFFICIENT AND LOW WAVINESS
Document Type and Number:
WIPO Patent Application WO/2019/042313
Kind Code:
A1
Abstract:
A metal sheet having a low friction coefficient and a low waviness. Multiple round or roughly-round small pits are distributed on the surface of the metal sheet. The diameter of a single pit ranges from 30 μm to 150 μm, and the overlap between adjacent pits is lower than 10%, the proportion of the area of pits in per square millimeter in the surface of the metal sheet where the pits are located to the area of the superficial area of the surface is greater than 30%, and the difference between the quantities of pits in any unit square millimeter is less than 20%. By means of the proper design of a surface microstructure, the friction coefficient and the waviness can be effectively reduced, thereby improving the shaping and painting performance of the material.
Inventors:
CHEN XIAOMING (CN)
LI SHANQING (CN)
QUAN JIZHE (CN)
LI SHANQING (CN)
QUAN JIZHE (CN)
Application Number:
PCT/CN2018/102932
Publication Date:
March 07, 2019
Filing Date:
August 29, 2018
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
B21B1/26
Foreign References:
| CN2344106Y | 1999-10-20 | |||
| CN2183225Y | 1994-11-23 | |||
| CN1087846A | 1994-06-15 | |||
| KR20120032992A | 2012-04-06 | |||
| US3754873A | 1973-08-28 | |||
| CN103769431A | 2014-05-07 | |||
| CN104884180A | 2015-09-02 |
Other References:
See also references of EP 3677352A4
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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