Production method of 250 MPa 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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[0034] The production method of the steel of the present invention mainly includes several stages such as hot rolling, cold rolling, and annealing.
[0035] Embodiments 1-4 of the production method for 250MPa grade cold-rolled magnetic pole steel of the present invention, the specific steps are:
[0036] (1) The slab is heated before hot rolling, the heating temperature is 1160-1230 °C, and the heating and holding time is 1 hour.
[0037] (2) The step of hot rolling; the starting rolling temperature is 1050-1100 °C, and the final rolling temperature is 840-880 °C; the deformation process is 7 times, the deformation time interval of each pass is less than 0.3s, and the final billet thickness is rolled from 30mm After rolling, it is cooled to 640-700 ℃ by spraying, uniform and moderate water-cooling method.
[0038] (3) Cooling by air cooling, pickling is performed when the hot-rolled steel coil is cooled to below 70°C.
[0039] (4) the step of cold rolling; the cold rolling r...
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