LUBRICANT-COATED STEEL SHEET AND TREATING LIQUID FOR FILMING LUBRICANT

摘要

PROBLEM TO BE SOLVED: To provide a lubricant-coated high tensile steel sheet for hot rolled steel sheet and cold rolled steel sheet that is excellent in film removing property, chemical processability, adhesion, moldability, and can be broadly applied as vehicle steel materials. SOLUTION: A lubricant coating where a lubricant including zinc stearate and wax is contained in a filming component including an alkali metal borate is formed on a surface of the steel sheet. It is preferable that solid content mass ratio of the lubricant and filming component is within a range of 0.1 to 2.0, and mass ratio of the zinc stearate and wax is within a range of 0.3 to 5.0. An amount of the lubricant coating adhered (the total mass of the alkali metal borate and lubricant) may be 10 to 1,000 mg/m2. COPYRIGHT: (C)2008,JPO&INPIT