05CuPCrNi material is a high weather resistance steel plate. Below is the 05CuPCrNi steel product analysis.
The main purpose of adding Cu and P to 05CuPCrNi steel is to improve the corrosion resistance and solid solution strengthen ferrite. Cu is the main and commonly used alloying element to improve atmospheric corrosion resistance. The addition of Cu to steel can form a dense copper oxide thin layer between the steel corrosion layer and the copper-rich layer, thereby slowing down and continuing the medium to the steel plate. corrosion. When the Cu content is greater than 0.15%, its resistance to atmospheric corrosion will increase slowly. P is an effective element in alloying elements to improve atmospheric corrosion resistance. In the electrolyte solution, it can accelerate the uniform dissolution of steel and the oxidation rate of iron, and help to form a uniform rust layer on the surface of the steel, and is bound to the inner rust layer Obviously, thereby improving the corrosion performance of steel.
The Cu in
05CuPCrNi steel is controlled at 0.25%-0.35%, and the lower limit of P is controlled at 0.07%-0.10%, which can meet the requirements of atmospheric corrosion resistance. Cr is also one of the alloying elements that improve the atmospheric corrosion resistance of low-alloy steels, but generally it has obvious effects when combined with Cu. Cr has a low corrosion potential and is an element with a tendency to passivation. It promotes the formation of a densely oxidized passivation film on the surface of the steel in the atmosphere, thereby improving the corrosion resistance of the steel.
The content of Cr in the atmospheric corrosion process is controlled within 0.30%-0.45%. Ni is also one of the effective alloying elements resistant to atmospheric corrosion. When the Ni content is less than or equal to 1% and the 05CuPCrNi steel sheet contains Cu, the effect of improving the corrosion resistance is not obvious. However, the ratio of Ni to Cu content of 1:3 can form alloy phases. Therefore, controlling the Ni content of Cu 0.3% steel to be greater than 0.1% can prevent it from cracking during hot rolling.
