Stainless steel non-annealing direct cold rolling method
A stainless steel and annealing technology, applied in the field of steel rolling, can solve the problems of long production cycle and many production processes.
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Embodiment 1
[0037] (1) A ferritic stainless steel, composition C: 0.039%, Si: 0.38%, Mn: 0.42%, P: 0.025%, S: 0.005%, Cr: 16.32%, and the balance is Fe and unavoidable impurities.
[0038] (2) Process route
[0039] Hot rolling→cold rolling→cold rolled coil annealing pickling→finishing.
[0040] (3) Hot rolling process
[0041] After hot rolling, no laminar cooling water is used, and the coiling temperature is 756°C.
[0042] (4) Cold rolling process
[0043] The total rolling deformation rate of cold rolling is 50%, the deformation rate of the first rolling pass is 25%, and the deformation rate of the finished product pass is 8.5%; the thickness of the finished cold-rolled coil is 1.5mm; the actual range of rolling speed is 70-86m / min.
[0044] The rolling process is stable, the rolling pressure is slightly higher than the conventional process, and there is no obvious fluctuation. The elongation of the finished product after breaking is 26%, which meets the standard requirements.
Embodiment 2
[0046] (1) An austenitic stainless steel with composition Si: 0.52%, Mn: 0.89%, P: 0.020%, S: 0.003%, Cr: 18.71%, Ni: 8.11%, and the balance is Fe and unavoidable impurities.
[0047] (2) Process route
[0048] Hot rolling→hot-rolled coil pickling→cold rolling→cold-rolled coil annealing pickling→finishing;
[0049] (3) Hot rolling process
[0050] After hot rolling, no laminar cooling water is used, and the coiling temperature is 776°C.
[0051] (4) Cold rolling process
[0052] The total rolling deformation rate of cold rolling is 50%, the deformation rate of the first rolling pass is 28%, and the deformation rate of the finished product pass is 8.1%; the thickness of the finished cold-rolled coil is 2.0mm; the actual range of rolling speed is 74-98m / min.
[0053] The rolling process is stable, the rolling pressure does not fluctuate significantly, and the elongation rate of the finished product after breaking is 55%, which meets the standard requirements.
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Abstract
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