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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.

Inactive Publication Date: 2021-09-14
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of traditional cold-rolled coils is: hot rolling→hot-rolled coil annealing and pickling→cold rolling→cold-rolled coil annealing and pickling→finishing, with many production processes and long production cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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

The invention belongs to the technical field of steel rolling, and specifically relates to a stainless steel non-annealing direct cold rolling method sequentially comprising the steps of hot rolling, cold rolling, cold-rolled coil plate annealing and acid pickling and finishing. According to the stainless steel non-annealing direct cold rolling method, on the premise that the performance of a finished product meets the standard requirement, the annealing (acid pickling) procedure of a hot-rolled coil plate is omitted, the production process is shortened, the production efficiency is improved, the production cost is reduced, and low-cost and high-efficiency production of strip steel is achieved.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for direct cold rolling of stainless steel without annealing. Background technique [0002] In recent years, the iron and steel industry is facing severe challenges, and "upgrading products, reducing costs and increasing efficiency" has become the development goal of various iron and steel enterprises. The production process of traditional cold-rolled coils is: hot rolling → annealing and pickling of hot-rolled coils → cold rolling → annealing and pickling of cold-rolled coils → finishing, with many production processes and long production cycles. [0003] Therefore, there is an urgent need in this field to simplify and upgrade the production process of cold-rolled coils to meet the characteristics of the times and the requirements of the situation. Contents of the invention [0004] In order to improve production efficiency, the present invention st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/02B21B37/56B21B37/74C21D1/26C21D8/02C22C38/02C22C38/04C22C38/18C22C38/40
CPCB21B3/02B21B37/74B21B37/56C21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D1/26C22C38/02C22C38/04C22C38/18C22C38/40
Inventor 杨永超白晋钢杨东赵子钧
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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