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Manufacturing Method of Low Chromium Ferritic Stainless Steel Continuous Cold Rolling

A manufacturing method and technology of continuous cold rolling, applied in metal rolling, rolling force/roll gap control, temperature control, etc., can solve the problems of incomplete continuous rolling, improve strip uniformity and shorten production time , the effect of reducing the strength of the strip

Inactive Publication Date: 2015-07-29
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The publication number is JP2001137909, the publication date is May 22, 2001, and the name is "a bright annealed high-gloss stainless steel cold rolling manufacturing method" (MANUFACTURE 0F BA-FINISHED STAINLESS STEEL HAVING HIGH GLOSS USING TANDEM MILL) Japan Patent literature, which adopts the continuous rolling method to produce stainless steel, but the applied steel type is austenitic stainless steel, and continuous rolling has not been fully realized, and reversible rolling is required after continuous rolling

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  • Manufacturing Method of Low Chromium Ferritic Stainless Steel Continuous Cold Rolling
  • Manufacturing Method of Low Chromium Ferritic Stainless Steel Continuous Cold Rolling
  • Manufacturing Method of Low Chromium Ferritic Stainless Steel Continuous Cold Rolling

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Embodiment 1-5

[0029] Adopt the following steps to prepare low-chromium ferritic stainless steel (see Table 2 for the composition of each steel grade in this case embodiment 1-5 and comparative example, see Table 3 for the specific process parameters of each step in this case embodiment 1-5):

[0030] (1) Continuous casting after smelting raw materials;

[0031] (2) Hot-rolled black skin coils and coils: the final rolling temperature of hot rolling is controlled at 900-1000°C, and the coiling temperature is 750-850°C;

[0032] (3) pickling to remove the scale on the surface of the hot-rolled coil;

[0033] (4) Continuous cold rolling with a five-stand continuous rolling unit: the total reduction rate is 50-80%, the rolling speed is less than 500m / min, and the surface roughness of the work rolls for cold continuous rolling is controlled at 0.1-3.5um ;

[0034] (5) Annealing after cold rolling: continuous annealing for recrystallization at 750-900°C, holding time 0.5-3min / mm;

[0035] (6) p...

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Abstract

The invention discloses a low-chromium ferritic stainless steel cold continuous rolling manufacturing method, which comprises the following steps of (1) continuously casting raw materials after being smelted; (2) hot rolling and reeling: the final rolling temperature of the hot rolling is controlled at 900DEG C to 1000DEG C, and the reeling temperature is controlled at 750DEG C to 850DEG C; (3) removing oxide skin on the surface of a hot-rolled coil through acid washing; (4) cold continuoius rolling: total reduction rate is 50 to 80 percent, and the surface coarseness of a working of a roller for performing the cold continuous rolling is controlled at 0.1micrometers to 3.5micrometers; (5) annealing; and (6) removing the oxide skin on the surface of a cold-rolled coils. The shape and size precision of a produce produced through the technical scheme is better that that of the product produced by adopting a traditional method; moreover, tissues and performances can reach the level of the product produced by the traditional method; meanwhile, the annealing procedure before the cold rolling can be omitted by optimizing the hot rolling process; and in addition, through the configuration of the roll surfaces of a continuous rolling unit, different products with different smooth gloss can be realized.

Description

technical field [0001] The invention relates to a method for manufacturing steel grades, in particular to a method for manufacturing low-chromium ferritic stainless steel. Background technique [0002] In addition to general corrosion resistance, low chromium ferritic stainless steel also has good resistance to chloride stress corrosion, pitting corrosion, crevice corrosion and other local corrosion resistance. Compared with austenitic stainless steel, low-chromium ferritic stainless steel has the advantages of high strength, low tendency of cold work hardening, large thermal conductivity, small linear expansion coefficient, and good comprehensive performance. It has a wide range of applications and broad development prospects in the fields of home appliance industry, automobile industry, housing construction, petrochemical and environmental protection. The process steps of conventional low-chromium ferritic stainless steel cold-rolled products are: smelting → continuous ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B37/74B21B37/58
Inventor 方徽源马立王伟明徐军蔡冬敏杨宴宾
Owner BAOSHAN IRON & STEEL CO LTD
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