首页> 外国专利> HIGH STRENGTH STRUCTURAL STEEL OF TENSILE STRENGTH OF 700MPa GRADE WITH HIGH STRENGTH AND LOW YIELD RATIO AND METHOD OF MANUFACTURING THE SAME

HIGH STRENGTH STRUCTURAL STEEL OF TENSILE STRENGTH OF 700MPa GRADE WITH HIGH STRENGTH AND LOW YIELD RATIO AND METHOD OF MANUFACTURING THE SAME

机译：高强度低屈服比700MPa级抗拉强度高强度结构钢及其制造方法

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摘要

PURPOSE: A 780 MPa grade high-strength cold-rolled steel material with low yield ratio for a high-strength structure and a manufacturing method thereof are provided to reduce the yield ratio of a steel material while improving the strength thereof. CONSTITUTION: A method for manufacturing a 780 MPa grade high-strength cold-rolled steel material with low yield ratio for a high-strength structure comprises the steps of: re-heating a steel slab(S110), hot rolling the steel slab(S120), and cooling the hot rolled steel material(S130). The steel slab comprises carbon of 0.14-0.16 weight%, silicon of 0.45-0.55 weight%, manganese of 1.35-1.45 weight%, phosphorus of 0.03weight% or less, sulfur of 0.015 weight% or less, copper of 0.35-0.45 weight%, vanadium of 0.08-0.12 weight%, niobium of 0.035-0.045 weight%, nitrogen of 0.015 weight% or less, and iron and inevitable impurities of the remaining amount.

机译：目的：提供一种用于高强度组织的屈服比低的780MPa级高强度冷轧钢材及其制造方法，以降低钢材的屈服比，同时提高其强度。组成：一种用于高强度结构的屈服比低的780 MPa级高强度冷轧钢材料的制造方法，包括以下步骤：重新加热钢板（S110），热轧钢板（S120）），然后冷却热轧钢材（S130）。所述钢锭包含0.14-0.16重量％的碳，0.45-0.55重量％的硅，1.35-1.45重量％的锰，0.03重量％以下的磷，0.015重量％以下的硫，0.35-0.45重量％的铜。含量为0.03重量％，钒为0.08-0.12重量％，铌为0.035-0.045重量％，氮为0.015重量％以下，并且铁和不可避免的残留杂质量。

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公开/公告号KR101277807B1

专利类型
公开/公告日2013-06-21

原文格式PDF
申请/专利权人
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申请/专利号KR20100105575
发明设计人 황병일;
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申请日2010-10-27
分类号C21D8/02;C22C38;C22C38/20;B21B3/02;
国家 KR
入库时间 2022-08-21 16:24:59

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