Successfully developed high-quality SPA-H weathering steel

According to the theory of controlled rolling and controlled cooling, by reasonably formulating process parameters such as temperature, speed and reduction, the controlled rolling and controlled cold rolling process of SPA-H weathering steel is formulated, and the focus is on the effect of rolling temperature and speed on the post-rolling structure of SPA-H weathering steel. and performance impact.

Weathering steel SPA-H uses Japanese grades, which are equivalent to my country's Q355GNH and Q355NH; the main purpose is to manufacture vehicles, containers, buildings, towers, etc.

Among them, Cu, P, Ni elements can improve the atmospheric corrosion resistance of SPA-H weathering steel; the design of rolling process parameters of weathering steel SPA-H is explained, and the heating temperature, the starting temperature of rough rolling, the rolling temperature of finishing rolling are analyzed. Effects of finishing rolling temperature and coiling temperature on microstructure and properties of weathering steel SPA-H.

Through the large-scale industrial production practice and tracking analysis of the mechanical properties of SPA-H weathering steel, it was verified that the rolling process with optimized process parameters could ensure 100% pass rate of mechanical properties, and SPA-H weathering steel was successfully developed.