Method for manufacturing nickel-chromium plating steel band for battery steel shell

A battery steel shell and nickel plating technology, applied in the field of steel material processing, can solve the problems of reducing anti-corrosion performance, coating peeling, and high iron exposure rate, and achieve the effects of improving surface state, increasing anti-corrosion performance, and high mechanical performance

Inactive Publication Date: 2013-01-16
WUXI FANGZHENG METAL LIGATURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology mainly focuses on the electrodeposition of thin nickel coatings, so that in some processes such as deep rolling and deep drawing, the substrate is easily exposed because the coating is too thin; and due to the interface between the thick coating and the substrate Thick coatings are prone to coating peeling and peeling due to excessive stress or improper heat treatment process
The diffusion layer of the existing nickel-clad steel strip is mainly Fe-Ni or Fe-Ni-C diffusion layer, which has a high iron exposure rate, which is easy to reduce the anti-corrosion performance, and the heat treatment process is not suitable, and it is easy to form a phase boundary at the interface. The interface mechanical properties of engineering materials are extremely harmful
In addition, a good matching relationship cannot be formed in terms of elongation, tensile strength, and hardness
The shortage of these nickel-coated steel strips makes them unsuitable for the working conditions of battery steel casings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a nickel-chromium-plated steel strip for battery steel cases, the chemical composition of the steel strip is composed of the following components in weight percentage: C: 0.15%, Si: 0.4%, Mn: 0.5%, Als: 0.02 %, Ti: 0.05%, P: ≤0.03%, S: ≤0.01%, Ni: 0.5%, Nb: 0.7%, N: ≤0.015%, O: ≤0.006%, the rest is Fe and unavoidable impurities, Described preparation method comprises the steps:

[0028] (3) Carry out smelting, continuous casting, grinding, and hot rolling according to the above-mentioned composition to prepare hot-rolled steel plates,

[0029] (2) Annealing: the annealing temperature is 770°C, pickling with dilute hydrochloric acid after annealing;

[0030] (3) Cold rolling: multi-pass cold rolling, the cold rolling reduction rate of each pass is 20%, annealing in the middle, the temperature is 770 ° C, cold rolling to the thickness of the finished product; then annealing, the annealing temperature is 770- ℃, the annealing time is 5 hours, and t...

Embodiment 2

[0036] A method for preparing a nickel-chromium-plated steel strip for battery steel cases, the chemical composition of the steel strip is composed of the following components in weight percentage: C: 0.20%, Si: 0.2%, Mn: 0.7%, Als: 0.01 %, Ti: 0.08%, P: ≤0.03%, S: ≤0.01%, Ni: 0.3%, Nb: 0.9%, N: ≤0.015%, O: ≤0.006%, and the rest are Fe and unavoidable impurities, Described preparation method comprises the steps:

[0037] (4) Carry out smelting, continuous casting, grinding, and hot rolling according to the above-mentioned composition to prepare hot-rolled steel plates,

[0038] (2) Annealing: the annealing temperature is 790°C, pickling with dilute hydrochloric acid after annealing;

[0039](3) Cold rolling: multi-pass cold rolling, the cold rolling reduction rate of each pass is 30%, annealing in the middle, the temperature is 790 ° C, cold rolling to the thickness of the finished product; then annealing, the annealing temperature is 790 ° C , the annealing time is 5 hours,...

Embodiment 3

[0045] A method for preparing a nickel-chromium-plated steel strip for battery steel cases, the chemical composition of the steel strip is composed of the following components in weight percentage: C: 0.18%, Si: 0.3%, Mn: 0.6%, Als: 0.015 %, Ti: 0.065%, P: ≤0.03%, S: ≤0.01%, Ni: 0.4%, Nb: 0.8%, N: ≤0.015%, O: ≤0.006%, and the rest are Fe and unavoidable impurities, Described preparation method comprises the steps:

[0046] (5) Smelting, continuous casting, grinding, and hot rolling are carried out according to the above-mentioned composition to prepare hot-rolled steel plates,

[0047] (2) Annealing: the annealing temperature is 780°C, pickling with dilute hydrochloric acid after annealing;

[0048] (3) Cold rolling: multi-pass cold rolling, the cold rolling reduction rate of each pass is 25%, annealing in the middle, the temperature is 780°C, cold rolling to the thickness of the finished product; then annealing, the annealing temperature is 780°C , the annealing time is 4 h...

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Abstract

The invention discloses a method for manufacturing a nickel-chromium plating steel band for a battery steel shell. According to the method, ingredients of low-carbon steel are adjusted, proper amount of alloy elements of Ti, Ni, Nb and the like is added, and the content of N and O is controlled to improve surface states; parameters of a cold milling process and an annealing process are adjusted aiming at the adjusted ingredients of the steel; a chromium coating is used as a diffusion impervious layer, so that the diffusion of iron can be blocked effectively; and an anticorrosive coating which contains 20 to 30 percent of chromium and has a quasi-stainless steel structure is formed in the diffusion layer, so that the anticorrosive performance is enhanced doubly. Aiming at double-layer plating design concept of nickel-chromium plating, the ingredients of a nickel plating solution and a chromium plating solution and a plating process are adjusted, so that the coating has the characteristics of bright surfaces, low porosity and high mechanical performance.

Description

technical field [0001] The invention relates to the technical field of steel material processing, in particular to a method for preparing a nickel-chrome-plated steel strip for battery steel cases. Background technique [0002] The steel case production technology of existing secondary battery and alkaline primary battery is to use roll plating nickel plating layer again after molding with low carbon steel strip. Due to the difficulty in cleaning, insufficient plating depth and discharge at the tip of the plating during rolling nickel plating, this process is gradually being replaced by another process. Diffusion forms a nickel / iron diffusion layer, and effectively controls the thickness of the diffusion layer and controls the exposure rate of iron on the nickel-plated surface. [0003] U.S. Patent No. 5,679,181 discloses a production process for corrosion-resistant nickel-coated steel strips. The process is nickel-plated on at least one side of the cold-rolled steel strip,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D8/02C25D3/12C25D5/50
Inventor 宋志方
Owner WUXI FANGZHENG METAL LIGATURE
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