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Manufacturing method for overcoming hot-rolled soft and hard edges of ferritic stainless steel

A manufacturing method, stainless steel technology, applied in the field of metallurgical steel rolling, to achieve the effect of solving poor forming performance, increasing elongation, and improving mechanical properties

Active Publication Date: 2022-02-25
鞍钢联众(广州)不锈钢有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a manufacturing method that overcomes the soft and hard edges of ferritic stainless steel hot rolling, so as to reduce a series of cost problems caused by poor performance through the control of forming performance. The present invention is easy to operate and suitable for factories Large-scale production can eliminate the problem of uneven mechanical properties of steel coils to the greatest extent. After slow cooling, the surface and internal quality of steel coils are excellent, reducing the occurrence of defective products

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  • Manufacturing method for overcoming hot-rolled soft and hard edges of ferritic stainless steel

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Embodiment Construction

[0021] Below in conjunction with specific embodiment the embodiment of the present invention is further described:

[0022] In the embodiment of the present invention, the production of black-skinned steel coils without soft and hard edges and the hot-rolled steel coils of the present invention with soft and hard edges should be scheduled sequentially, and the black-skinned steel coils should be scheduled 3-4 hours in advance.

[0023] See Table 1 for the steel composition of the embodiment; see Table 2 for the hot-rolling process parameters of the embodiment;

[0024] Table 1 embodiment steel composition (wt%)

[0025] C Si mn P S Ni Cr Mo Cu N 0.04 0.35 0.334 0.026 0.003 0.141 16.15 0.008 0.045 0.045

[0026] Table 2 embodiment hot rolling process parameter

[0027]

[0028]

[0029] Table 3 Placement of heat preservation pit

[0030]

[0031] 1) Heating process of the heat preservation pit: According to the production time...

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Abstract

The invention relates to a manufacturing method for overcoming hot-rolled soft and hard edges of ferritic stainless steel. According to the method, a heat preservation pit is adopted to slowly cool a hot rolled steel coil, and meanwhile, heat provided by other hot coils is utilized to slowly reduce the temperature in the area where the hot rolled steel coil is located, so that the steel coil can be evenly heated and slowly cooled. According to the method, a special slow cooling measure is adopted, the heat preservation function of the heat preservation pit is utilized, heat is provided by other hot coils, the temperature in a certain area is slowly reduced, the purposes of uniform heating and slow cooling of the steel coil are achieved, the alpha phase is shifted by the gamma phase in the phase change process, the mechanical performance of the steel coil is effectively improved, and the problem that the forming performance of 430 / White is poor is solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steel rolling, and in particular relates to a manufacturing method for overcoming soft and hard edges in ferritic stainless steel hot rolling. Background technique [0002] The existing 430\White products are placed in the storage area after hot rolling, the temperature continues to drop, the temperature difference between the inside and outside is getting bigger and bigger, the cooling speed of each part is uneven, and the mechanical properties are uneven, resulting in concave and convex stripes in the downstream formed products. Poor performance issue. Contents of the invention [0003] The purpose of the present invention is to provide a manufacturing method that overcomes the soft and hard edges of ferritic stainless steel hot rolling, so as to reduce a series of cost problems caused by poor performance through the control of forming performance. The present invention is easy to operat...

Claims

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Application Information

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IPC IPC(8): C21D8/02C21D1/00C21D9/52
CPCC21D8/0247C21D1/00C21D9/52
Inventor 梁健浑徐向东方剑锋黄卫文谢水旺罗杰林杰
Owner 鞍钢联众(广州)不锈钢有限公司
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