Based on the successful experience in the development of Niobium-titanium reinforced large beam steel,the low carbon and niobium-titanium microalloying components were used to optimize the microstructure and improve the properties of the steel plate to ensure the high hardness.Chromium element was added in the composition design,and the controlled rolling and cooling process was optimized by combining the ultra-fast cooling advantage of the 2050 pro-duction line,which improved the low temperature toughness and reduced the surface roughness of the strip steel.The tensile strength of 860 MPa,yield strength of 743 MPa and hardness of HB of 255 were successfully developed.With a roughness of 0.96 m after pickling and finishing,the high sliding and wear-resistant car body steel has excellent welding and cold-bending performance,which meets the requirements of automotive steel customers for light-weight and high sliding.
维普
万方数据