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HIGH-FIXED COLD FORMED STEEL PLATE WITH EXCELLENT COMPATIBILITY AND COATING PROPERTIES, BASED ON ZINC-PLATED STEEL PLATE AND METHOD OF MANUFACTURING THEREOF
HIGH-FIXED COLD FORMED STEEL PLATE WITH EXCELLENT COMPATIBILITY AND COATING PROPERTIES, BASED ON ZINC-PLATED STEEL PLATE AND METHOD OF MANUFACTURING THEREOF
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机译:基于镀锌钢板的具有优异相容性和涂层性能的高固冷弯型钢板及其制造方法
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摘要
Provided is a high-strength cold rolled steel sheet and a high-strength zinc-coated steel sheet, which are primarily used as a structural member and a reinforcement of the car body, and has excellent formability and coating properties; and methods for manufacturing the same. The steel sheet comprises 0.01-0.2 wt% of carbon (C), 0.01-2.0 wt% of silicon (Si), 0.5-4.0 wt% of manganese (Mn), less than 0.1 wt% of phosphorous (P), less than 0.03 wt% of sulfur (S), less than 1.0 wt% of soluble aluminum (Sol. Al), 0.001-0.1 wt% of nitrogen (N), 0.005-1.0 wt% of antimony (Sb), and the balance of iron (Fe) with inevitable impurities. Provided is also a zinc- coated steel sheet and preparation thereof using the same steel sheet. According to the present invention, excellent coating properties and high tensile strength of more than 490 MPa can be achieved. In addition, the formability of TS * El balance having 15,000 MPaD % or higher can be secured. Further, excellent bake hardenability of a BH value having 80 MPa or higher can be obtained.
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