15CrMo alloy channel steel is a cold-bending material

When cold-bending 15CrMo alloy channel steel, the matching of material properties and process parameters must be carefully considered. The following is a detailed analysis:

15CrMo alloy channel steel possesses high thermal strength, oxidation resistance, and a certain degree of resistance to hydrogen corrosion. Below 550℃, its thermal strength and softening resistance are good, but when the temperature exceeds 550℃, its oxidation resistance deteriorates, and its creep strength decreases significantly. Prolonged exposure to 500℃-550℃ can cause carbides to spheroidize, leading to a reduction in steel strength.

In terms of cold bending, 15CrMo alloy channel steel can be cold-bent. However, the influence of material properties on the process must be considered. Because 15CrMo alloy channel steel contains a high content of Cr, C, and other alloying elements, the steel has a significant hardening tendency, which may affect the difficulty of cold bending and the quality of the finished product. For example, during cold bending, if the bending radius is too small or the bending force is not properly controlled, cracks or deformation may occur in the material.

The requirements for cold bending vary depending on the specifications of 15CrMo alloy channel steel. For example, for large-diameter channel steel with a wall thickness of 10-20mm and a bending radius ≤ 3 times the outer diameter of the steel pipe, high-temperature tempering is required after cold bending to eliminate processing stress and improve the material's microstructure and properties.