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High-strength hot-rolled weathering panels for the new generation of railway wagons in Pangang are the result of integrated innovation. First, the vanadium-nitrogen alloy that can only be commercialized by American Vanadium Company and China Panzhihua Iron and Steel Co., Ltd. is used to improve its strength. Secondly, the technical route controlled by calcium treatment and hot rolling process is adopted, which breaks through the smelting and low-carbon of low-carbon and low-sulfur steel. The “bottleneck†of nitrogen steel smelting, nitrogen strengthening optimization and tissue control technology has formed a complete set of steel plates with high strength, high toughness, high plasticity, obvious yield point and excellent weldability and corrosion resistance. technology. Third, a utility model patent, an invention patent and a proprietary technology that is applying for invention patents formed during the research period have been promoted and applied in the production of other products of Panzhihua Iron and Steel Co., Ltd., and achieved remarkable economic benefits and society. benefit. At present, the 450 MPa Q450NQR1 hot-rolled weathering board produced by Panzhihua Iron & Steel Co., Ltd. has passed the certification of the Ministry of Railways, and the products have been well received by users.
The leading performance of hot rolled sheet for the new generation of railway wagons in Pangang
Recently, Panzhihua Iron and Steel Co., Ltd. relied on independent innovation to successfully complete the research on the development of high-strength and atmospheric corrosion resistant hot-rolled steel sheets for 450 MPa class railway trucks, and officially transferred them into production and use. The research results use Pangang's original vanadium-nitrogen alloy process and a number of patented proprietary technologies to produce high-strength hot-rolled weathering sheets for a new generation of railway wagons, namely high-strength and atmospheric corrosion-resistant hot-rolled steel sheets for 450 MPa class railway wagons. . After testing, the comprehensive physical performance index of production is at the domestic leading level, which lays a solid foundation for the high-speed railway passenger transportation and heavy cargo transportation in China.