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Iron-chromium-aluminum cold-rolled coil continuous line annealing and pickling production method

A production method, iron-chromium-aluminum technology, is applied in the production of continuous line annealing and pickling of 1Cr13Al4 iron-chromium-aluminum alloy cold-rolled steel coils, and in the field of continuous-line annealing and pickling of wide-width iron-chromium-aluminum cold-rolled coils, which can solve the problems that cannot be pickled by pickling. Cleaning and other issues to achieve stable product performance and reduce production costs

Active Publication Date: 2021-08-10
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After annealing, a dense oxide layer is formed on the surface, which cannot be pickled by conventional pickling stainless steel, and it is necessary to match the annealing speed and pickling speed

Method used

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  • Iron-chromium-aluminum cold-rolled coil continuous line annealing and pickling production method
  • Iron-chromium-aluminum cold-rolled coil continuous line annealing and pickling production method
  • Iron-chromium-aluminum cold-rolled coil continuous line annealing and pickling production method

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Embodiment 1

[0066] The cold-rolled 1Cr13Al4 coil with a thickness of 1.0mm, a width of 1240mm, and a coil weight of 14 tons is used as a raw material. The coil is rolled by a 3.5mm-thick hot-rolled coil through a 20-roller Sendzimir rolling mill. The chemical composition is calculated by mass percentage. For: C: 0.0143%, Cr: 13.8%, Al: 5.2922%, Si: 0.1787%, Mn: 0.0759%, P: 0.0114%, S: 0.001%, Ti: 0.3174%, N: 0.0024%, and the rest is Fe and other unavoidable impurities.

[0067] The production method of the present embodiment is as follows:

[0068] (1) After uncoiling the cold-rolled 1Cr13Al4 steel coil, first cut off the unrolled part and the cold-rolled transition part with the actual thickness of the head ≥ 1.0mm, so as to ensure that there is no parking of the rolling mill on the part with the actual thickness of the steel coil ≥ 1.0mm Roll printing, the unrolled part and the transition part are rolled into a small roll and packed;

[0069] Send the clean-cut steel coil head to the ...

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Abstract

The invention discloses an iron-chromium-aluminum cold-rolled coil continuous line annealing and pickling production method which comprises the following steps: (1) welding two adjacent iron-chromium-aluminum cold-rolled coils to obtain a steel strip; (2) carrying out degreasing treatment on the steel strip; (3) carrying out annealing treatment on the degreased steel strip; (4) cooling the annealed steel strip; and (5) carrying out acid pickling treatment on the cooled steel strip. In the step (3), the degreased steel strip is preheated to 600-800 DEG C in a heating furnace and then is heated to the final heat treatment temperature of 880-960 DEG C, the heat preservation time is 1.0-3.0 min / mm, and the tension density in the heating furnace is 0.5-0.8 Kg / mm < 2 >. By the adoption of the production method, the 1Cr13Al4 cold-rolled coil with the width being 900-1300 mm, the thickness being 0.5-1.2 mm and the coil weight being 10 tons or above can be produced, the grain size of the 1Cr13Al4 cold-rolled coil after annealing is 4-6 levels, the mechanical property meets the requirements of High Resistance Electrothermal Alloy GB / T 1234-2012, and the finished product is a qualified 2B surface.

Description

technical field [0001] The invention relates to the technical field of iron-chromium-aluminum alloy steel coil processing. Specifically, the invention relates to a production method for continuous line annealing and pickling of wide-width iron-chromium-aluminum cold-rolled coils, and more specifically to a 1Cr13Al4 iron-chromium-aluminum alloy cold-rolled coil production method. Production method of continuous line annealing and pickling of rolled steel coils. Background technique [0002] 1Cr13Al4 is a common iron-chromium-aluminum alloy, with a Cr content of 12.0%-15.0% and an Al content of 4.0%-6.0%. 1Cr13Al4 has the advantages of large resistivity coefficient, small resistance temperature coefficient, good heat resistance, low specific gravity, good high temperature oxidation resistance and cheap price, so it is widely used in the electric heating industry. [0003] 1Cr13Al4 is a ferritic alloy. The grain grows rapidly at high temperature, so the weldability is very poo...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D9/52C21D9/50C23G1/08C25F1/06
CPCC21D1/26C21D9/52C21D9/50C23G1/086C25F1/06
Inventor 杨密高培军范梦甜段维芳韩佳明张虎郑正
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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