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Heat treatment technique of stainless steel for 410L containers

A stainless steel and container technology, applied in the field of stainless steel, can solve problems such as high cost and slow production rhythm, and achieve the effect of reducing production cost and speeding up production rhythm

Inactive Publication Date: 2015-09-16
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, bell annealing is required between hot rolling and hot pickling, which is costly and slow in production

Method used

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  • Heat treatment technique of stainless steel for 410L containers
  • Heat treatment technique of stainless steel for 410L containers
  • Heat treatment technique of stainless steel for 410L containers

Examples

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Embodiment Construction

[0013] The stainless steel heat treatment process for 410L containers includes the following steps (take the thickness of 0.75mm*width of 1250mm and the coil weight of 18 tons as an example):

[0014] 1) The laminar flow cooling of the hot rolling process is not used, the coiling temperature control range: 800-840 ℃, the side blowing of the strip must be put into use, and the black coil off-line adopts the stack cooling process;

[0015] 2) The annealing process of the original bell furnace is cancelled;

[0016] 3) Cold wire heat treatment process: TV value 40±5 mm*m / min (0.75mm plate);

[0017] 4) Cold wire heat treatment process: target TV value 40 mm*m / min (0.75mm plate);

[0018] 5) Cold wire heat treatment process: material temperature 840±10°C (subject to material temperature in zone 7).

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Abstract

The invention provides a heat treatment technique of stainless steel for 410L containers. The technical scheme is as follows: the heat treatment technique comprises the following steps: dephosphorizing, AOD (argon oxygen decarburization) refining, LF (ladle furnace) refining, continuous casting, trimming, hot rolling, hot pickling, cold rolling, cold wire annealing pickling and straightening, wherein in the hot rolling process, laminar cooling is not performed, the coiling temperature is controlled at 800-840 DEG C, the sheet strip is blown from the side, and the black coil drop adopts a pile cooling technique; and the cold wire annealing TV value is 40+ / -5 mm*m / minute, the target TV value is 40mm*m / minute, and the material temperature is 840+ / -10 DEG C. The technique cancels the hood-type annealing technique, and lowers the production cost and accelerates the production rhythm on the premise of ensuring the product structure and properties.

Description

technical field [0001] The invention relates to the field of stainless steel, in particular, the invention relates to a heat treatment process of a stainless steel coil plate for refrigerated 410L containers. Background technique [0002] SUS410L ferritic stainless steel contains about 11.0-13.5% chromium, and its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its resistance to chloride stress corrosion is better than other types of stainless steel, because it is low-carbon Ferrite structure, good bending and mechanical properties of welding parts. Mainly used in refrigerated container frames and exterior materials, heat-resistant equipment components. The chemical composition of stainless steel SUS410L for containers requires lower P, S, and N contents, and requires certain strength properties. The ingredients are shown in Table 1. In actual production, through relevant production process adjustments, the performance i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02
Inventor 李具仓徐斌靳塞特王建泽
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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