Processing Technology of SAPH440 High Strength Structural Steel

Select the hot-rolled coil with the brand name SAPH440→the first slitting and slitting→pickling→finish rolling→stress relief annealing→the second slitting and slitting→package and storage

By pickling the first slitting hot-rolled coil before SAPH440 steel rolling, the pickling process removes the oxide scale on the surface of the hot-rolled SAPH440 steel plate, preventing the scale from being pressed into the material matrix during subsequent rolling. Quality issues. The slight finish rolling method is adopted in the rolling process, so that the cold-rolled deformation of SAPH440 steel is small, while ensuring the mechanical properties of hot-rolled materials, SAPH440 steel has the dimensional accuracy of cold-rolled materials, and the tensile, yield strength and elongation properties of finished SAPH440 steel It meets the standard requirements of high-strength structural steel, the production process is simplified, the efficiency is greatly improved, and the stress relief annealing after rolling is added. The finished SAPH440 steel meets the mass production process requirements of fine blanking structural parts, and will not cause forming and bending due to cold hardening Cracking and other quality problems have been eliminated, and the pass rate of product production has been improved.

SAPH440