Document Type and Number:
Japanese Patent JPWO2022123930
Kind Code:
A1
Abstract:
An object of the present invention is to provide a steel sheet that has a lubrication film, the steel sheet having low sliding resistance in a portion at risk of cracking when press forming is performed, excellent press formability in a portion in which die galling is considered to occur due to high surface pressure, and excellent press formability, in particular, when the surface roughness of the steel sheet varies over a wide range, and is to provide a method for manufacturing the steel sheet and the like.A steel sheet having a film containing an organic resin and a wax on at least one surface of the steel sheet, in which the organic resin is at least one of an acryl-based resin, an epoxy-based resin, a urethane-based resin, a phenol-based resin, a vinyl acetate-based resin, and a polyester-based resin, in which the wax is a polyolefin wax having a melting temperature of 120°C or higher and 140°C or lower and an average particle size of 3.0 um or less, in which a proportion of the wax in the film is 10 mass% or more, and in which a coating weight per side W (g/m2) of the film and an arithmetic average roughness Ra (um) of the steel sheet satisfy relational expression (1) below. W≥0.12×Ra2+0.2
Application Number:
JP2022500670A
Publication Date:
June 16, 2022
Filing Date:
October 22, 2021
Export Citation:
Domestic Patent References:
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| JP2017105986A | 2017-06-15 | |||
| JP2004052072A | 2004-02-19 | |||
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