种低屈强比Q460GJ建筑用钢板及其生产方法

• Format: Patent
• Language: Chinese
• Published: 26.12.2017
• Subjects: ALLOYS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

本发明公开了种低屈强比Q460GJ建筑用钢板及其生产方法，属于建筑用钢技术领域。钢板的屈服强度≥460MPa，化学成分按重量百分比为：C：0.17～0.19％、Si:0.35～0.45％、Mn：1.50～1.60％、P≤0.015％、S≤0.010％、Nb：0.03～0.04％、V：0.05～0.06％、Ti：0.01～0.02％、Als：0.020～0.040％，其余为Fe和杂质。生产方法包括以下步骤：步骤冶炼，步骤二连铸，步骤三加热，步骤四轧制和冷却，步骤五精整和探伤，成品钢板具有良好的性能，可应用于高层、超高层、厂矿、塔架、大跨度以及大型结构工程建设等领域。 The invention discloses a low-yield-ratio Q460GJ construction steel plate and a production method thereof, and belongs to the technical field of construction steel. The yield strength of the steel plate is greater than or equal to 460 MPa, and the steel plate is composed of, by weight, 0.17%-0.19% of C, 0.35%-0.45% of Si, 1.50%-1.60% of Mn, 0-0.015% of P, 0-0.010% of S, 0.03%-0.04% of Nb, 0.05%-0.06% of V, 0.01%-0.02% of Ti, 0.020%-0.040% of Als, and the balance Fe and impurities. The production method comprises the following steps of 1, smelting, 2, continuous casting, 3, heating, 4, rolling and cooling, and 5, finishing and flaw detection. The finished steel plate has good performance and can be applied to the fields such as h