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A production process of cold-rolled ultra-thin deep-drawing steel strip

A production process and steel strip technology, which is applied in the production process field of cold-rolled ultra-thin deep-drawn steel strip, can solve problems such as unstable mechanical properties, large tolerance fluctuations, and annealing bonding, and achieve product quality improvement and thickness tolerance fluctuations The effect of small, stable deep drawing performance

Active Publication Date: 2011-12-21
YONGXIN PRECISION MATERIAL WUXI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ultra-thin deep-drawing steel strip made by the existing technology has some shortcomings such as thicker thickness (thinnest 0.15mm), large tolerance fluctuation, unstable mechanical properties, and annealed bonding on the surface.

Method used

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  • A production process of cold-rolled ultra-thin deep-drawing steel strip
  • A production process of cold-rolled ultra-thin deep-drawing steel strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this embodiment, the cold-rolled coil with brand SPCE is selected as the raw material, and the thickness of the raw steel strip is 0.28 mm, and the width is 460 mm. The thickness of the finished steel strip is 0.08mm, the width is 80×2 / 90×2 / 100×1mm; the tensile strength is 310-350MPa; the elongation is ≥30%.

[0022] a. First select the grade as SPCE cold-rolled coil as the raw material, and the chemical composition content is: carbon (C) content 0.03%; silicon (Si) content 0.01%; manganese (Mn) content 0.18%; phosphorus (P) content 0.007%; The sulfur (S) content is 0.006%, and the thickness of the raw steel strip is 0.28mm;

[0023] b. The raw materials of cold rolled coils are finished rolling with a four-high high-precision reversible rolling mill. The lubricating coolant used in the finishing rolling is pure rolling oil. The thickness of the raw steel strip is cold-rolled from 0.28mm to the thickness of the finished steel strip of 0.08mm. The initial pass rollin...

Embodiment 2

[0037] In this embodiment, the cold-rolled coil with brand name SPCE is selected as the raw material, and the thickness of the raw steel strip is 0.30 mm, and the width is 415 mm. The thickness of the finished steel strip is 0.10mm, the width is 405mm; the tensile strength is 310-350MPa; the elongation rate is ≥30%.

[0038] a. First select the grade as SPCE cold-rolled coil as the raw material, and the chemical composition content is: carbon (C) content 0.02%; silicon (Si) content 0.02%; manganese (Mn) content 0.25%; phosphorus (P) content 0.009%; The content of sulfur (S) is 0.008%, and the thickness of the raw steel strip is 0.30mm.

[0039] b. The raw material of the cold rolled coil is finished rolling with a four-high high-precision reversing rolling mill. The lubricating coolant used in the finishing rolling is pure rolling oil, which is cold rolled from 0.30mm raw material thickness to 0.10mm finished product thickness. The initial pass rolling speed of the rolling mi...

Embodiment 3

[0053] In this embodiment, the cold-rolled coil with the brand name of SPCE is selected as the raw material, and the thickness of the raw steel strip is 0.35 mm, and the width is 415 mm. The thickness of the finished steel strip is 0.12mm, the width is 405mm; the tensile strength is 310-350MPa; the elongation is ≥30%.

[0054]a. First select the grade as SPCE cold-rolled coil as the raw material, and the chemical composition content is: carbon (C) content 0.05%; silicon (Si) content 0.03%; manganese (Mn) content 0.14%; phosphorus (P) content 0.006%; The content of sulfur (S) is 0.006%, and the thickness of the raw steel strip is 0.35mm.

[0055] b. The cold-rolled coil raw material is finished-rolled by a four-high high-precision reversible rolling mill. The lubricating coolant used in the finish-rolling is pure rolling oil, which is cold-rolled from 0.35mm raw material thickness to 0.12mm finished product thickness. The initial pass rolling speed of the rolling mill is 80 m / ...

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Abstract

The invention discloses a production process for performing cold-rolling on an extremely-thin deep-punching steel belt, which is widely used for the industries of battery production. The production process comprises the following steps of: a, selecting materials: selecting cold-rolled coils as raw materials; b, finish rolling: carrying out finish rolling on the cold-rolled coils by utilizing a four-roll high-accuracy reversible rolling machine; c, spraying and degreasing: carrying out spraying and degreasing treatment on the finish-rolled steel belt by utilizing a degreasing machine; d, annealing: carrying out cover-type annealing treatment on the degreased steel belt; e, leveling: carrying out dry-type leveling on the steel belt after cover-type annealing by adopting a two-roll leveling machine; f, bending straightening: carrying out bending straightening on the leveled steel belt by adopting a bending straightening machine; and g, cutting: after bending straightening, cutting the steel belt into finished products with various width requirements. According to the production process for performing cold-rolling on the extremely-thin deep-punching steel belt, the extremely-thin deep-punching steel belt is thinner, the thickness tolerance fluctuation is less, the deep-punching performance is stable, no defect caused by bonding is caused on the surface, the straightness of the plate shape is good, and the quality of the products is obviously improved.

Description

technical field [0001] The invention relates to a production process of a steel strip, in particular to a production process of a cold-rolled ultra-thin deep-drawn steel strip widely used in the battery industry. Background technique [0002] The cold-rolled ultra-thin steel strips used in the battery industry are all chilled and hard. After punching and nickel plating, heat treatment is performed to restore the plasticity of the material and then continue to be processed into finished products. However, as the battery industry needs to reduce costs, the processing technology of some products has been improved, and the raw materials used have also changed from the original chilled cold-rolled ultra-thin steel strip to the ultra-thin deep-drawn steel strip with good deep-drawing performance. [0003] At present, the existing ultra-thin deep-drawing steel strips are all made of hot-rolled coils, and the emulsion is used as the lubricating coolant in the cold-rolling process. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/28
Inventor 濮晓芳
Owner YONGXIN PRECISION MATERIAL WUXI