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HIGH STRENGTH MULTI-MATRIX HOT ROLLED STEEL SHEET HAVING EXCELLENT IMPACT RESISTANCE AND FORMABILITY OF EDGE PART AND METHOD FOR MANUFACTURING THE SAME
HIGH STRENGTH MULTI-MATRIX HOT ROLLED STEEL SHEET HAVING EXCELLENT IMPACT RESISTANCE AND FORMABILITY OF EDGE PART AND METHOD FOR MANUFACTURING THE SAME
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机译：具有出色的边缘部件抗冲击性和成形性的高强度多基体热轧钢板及其制造方法
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摘要
The present invention relates to a high strength composite steel hot-rolled steel sheet excellent in impact resistance and edge formability, comprising 0.03 to 0.15 wt% Si, 0.5 to 1.5 wt% Si, 1.5 to 2.0 wt% Mn, 0.01 to 0.08 wt% By weight, Cr: 0.2 to 0.8% by weight; 0.001 to 0.005 wt% of Mo, 0.001 to 0.05 wt% of P, 0.001 to 0.05 wt% of S, 0.001 to 0.01 wt% of N and 0.001 to 0.01 wt% of N, wherein the total amount of at least one component selected from Nb, And the balance Fe and inevitable impurities, and having a microstructure including a ferrite matrix and a bainite phase of 80 volume% or more, and having a diameter of 100 nm or more of Ti, Nb and V in the microstructure, A high strength composite material having an impact resistance characteristic that the number of carbonitride is 3 x 10 8 or less per unit area (1 cm 2 ) and a martensite phase fraction of the microstructure at the edge portion of the hot-rolled steel sheet is less than 5% The present invention relates to a hot rolled steel sheet and a manufacturing method thereof.
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机译：高强度复合钢热轧钢板技术领域本发明涉及一种耐冲击性和边缘成形性优异的高强度复合钢热轧钢板，其包含0.03〜0.15重量％的Si，0.5〜1.5重量％的Si，1.5〜2.0重量％的Mn，0.01〜0.08重量％。 Cr：0.2〜0.8重量％。 0.001至0.005wt％的Mo，0.001至0.05wt％的P，0.001至0.05wt％的S，0.001至0.01wt％的N和0.001至0.01wt％的N，其中选择的至少一种成分的总量A，由余量的Nb和剩余的Fe和不可避免的杂质组成，并且具有包括80体积％以上的铁素体基体和贝氏体相的组织，并且在组织中具有Ti，Nb和V的直径为100nm以上。高强度复合材料，其抗冲击特性是每单位面积的碳氮化物数量为3 x 10 8 或更少（1 cm 2 ），并且马氏体相分数为热轧钢板的边缘部分的显微组织小于5％。本发明涉及一种热轧钢板及其制造方法。
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