Production method of 450MPa grade cold rolled magnetic pole steel
A production method and magnetic pole steel technology, which is applied in the field of cold-rolled magnetic pole steel, can solve the problem of unreasonable coordination of cold-rolled magnetic pole steel plate strength and magnetic induction intensity, strict requirements for rolling equipment and process control, and unsatisfactory comprehensive quality of cold-rolled magnetic pole steel and other problems, to achieve excellent comprehensive performance, good coordination, and solve the effects of magnetic properties and strength
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[0036] The production method of the steel of the present invention mainly includes several stages such as hot rolling, cold rolling and annealing.
[0037] Embodiment 1-4 of the production method of 450MPa grade cold-rolled magnetic pole steel of the present invention, the specific steps are:
[0038] (1) The slab is heated before hot rolling, the heating temperature is 1160-1230°C, and the heating and holding time is 1 hour.
[0039] (2) The step of hot rolling; the starting rolling temperature is 1070-1130°C, and the final rolling temperature is 870-930°C; the deformation process is 7 passes, and the deformation time interval of each pass is less than 0.3s, and the final billet thickness is rolled from 30mm Thin steel plates with specifications of 2.5-4.5 mm are rolled and cooled to 620-680 ° C by spraying, uniform and moderate water cooling after rolling.
[0040] (3) Air-cooling is used for cooling, and pickling is carried out when the hot-rolled steel coil is cooled belo...
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