Low-cost Q690 steel plate and preparation method thereof
The invention belongs to the field of high-strength plate manufacturing, and particularly relates to a low-cost Q690 steel plate and a preparation method thereof. A proper amount of vanadium-nitrogen alloy is added into low-carbon medium-manganese molten steel, a large amount of nanoscale NV in the...
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| creator | LI ZHONGBO KANG WENJU XU SHAOPU ZHU XIANXING MA DESHENG YANG NIANHAO LIU JIE LIU QINGBO REN YI YU SA ZHAO HU SUN WENCAI |
| description | The invention belongs to the field of high-strength plate manufacturing, and particularly relates to a low-cost Q690 steel plate and a preparation method thereof. A proper amount of vanadium-nitrogen alloy is added into low-carbon medium-manganese molten steel, a large amount of nanoscale NV in the steel plate is promoted to be dispersed and separated out, the strength and toughness performance of the core of the high-strength plate is improved through the effect that NV promotes intracrystalline ferrite nucleation, grains are refined through large-compression-ratio rolling, quenching and tempering treatment is not needed, and the high-strength plate is obtained. The yield strength of the steel plate ranges from 702 MPa to 756 MPa, the tensile strength of the steel plate ranges from 782 MPa to 823 MPa, the ductility of the steel plate ranges from 15.6% to 18.9%, and the impact energy at the temperature of minus 40 DEG C is larger than 80 J. The use amount of expensive alloy is small, the production process is |
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A proper amount of vanadium-nitrogen alloy is added into low-carbon medium-manganese molten steel, a large amount of nanoscale NV in the steel plate is promoted to be dispersed and separated out, the strength and toughness performance of the core of the high-strength plate is improved through the effect that NV promotes intracrystalline ferrite nucleation, grains are refined through large-compression-ratio rolling, quenching and tempering treatment is not needed, and the high-strength plate is obtained. The yield strength of the steel plate ranges from 702 MPa to 756 MPa, the tensile strength of the steel plate ranges from 782 MPa to 823 MPa, the ductility of the steel plate ranges from 15.6% to 18.9%, and the impact energy at the temperature of minus 40 DEG C is larger than 80 J. 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| language | chi ; eng |
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| subjects | ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Low-cost Q690 steel plate and preparation method thereof |
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