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Cold roll for rolling lithium battery guard plate and manufacturing method thereof

A manufacturing method and technology of cold rolling rolls, which are applied in the fields of rolls, metal rolling, and manufacturing tools, etc., can solve problems such as product qualification rate affecting product surface quality, slippage of cold rolling rolls and materials to be rolled, and surface roughness reduction of cold rolling rolls. , to achieve the effect of increasing hardness, increasing elastic limit and increasing roughening temperature

Active Publication Date: 2013-11-20
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The lithium battery protection board required for the production of lithium battery needs to work stably for a long time in the environment of -20 ~ 60 ℃, so the quality requirements for the lithium battery protection board are high, and the quality of the cold roll used in the production of the lithium battery protection board The requirements are getting higher and higher. Lithium battery protection plates are usually produced by two-roll rolling. At present, the materials used to manufacture cold rolls in the domestic and foreign markets are mainly Cr2, Cr3, and Cr5 series. During the rolling process, cold rolls and Slipping occurs between the rolled materials; shortly after being put into production and use, the surface roughness of the cold rolls decreases sharply, which affects the surface quality of the product and the product qualification rate. These phenomena are mostly due to the poor wear resistance of the cold rolls, Caused by poor surface roughness retention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Cold rolls for rolling lithium battery protection plates. The design targets for the chemical components and mass percentages in the cold rolls are: C 0.8-0.9%, Si 0.8-0.9%, Mn 0.5-0.6%, Cr 3.3- 3.5%, Ni 0.5~0.6%, Mo 0.4~0.5%, V 0.3~0.4%, P≤0.015%, S≤0.015%, the rest is Fe and unavoidable impurities.

[0027] The manufacturing method of described cold roll comprises the following processing steps:

[0028] A. Melting and casting electroslag steel ingots: Proportion the raw materials according to the chemical composition and mass percentage required by the cold roll, and use the electric arc furnace for preliminary melting of the raw materials required for production. After melting into molten steel, the molten steel is completed in the LF+VD refining furnace of refining,

[0029] The refined molten steel is poured and die-cast into electrode ingots; the die-cast electrode ingots are annealed, and then electroslag remelting is used to melt and cast the electrode ingots ...

Embodiment 2

[0039] Processing step in embodiment 2 is identical with embodiment 1, and its difference is:

[0040] The design targets for the chemical components and mass percentages of the cold rolling rolls described in this example are: C 0.8-0.9%, Si 0.8-0.9%, Mn 0.5-0.6%, Cr 3.3-3.5%, Ni 0.5- 0.6%, Mo 0.4~0.5%, V 0.3~0.4%, P≤0.015%, S≤0.015%, the rest is Fe and unavoidable impurities.

[0041] Carry out chemical composition analysis to the electroslag steel ingot that step A obtains, obtain the chemical composition and its mass percentage composition in the electroslag steel ingot to be: C 1.0%, Si 0.5%, Mn 0.2%, Cr 2.5%, Ni 0.35%, Mo 0.2%, V 0.5%, P 0.02%, S 0.003%.

[0042] The cold rolled roll obtained in this example was measured by a dedicated roll Shore hardness tester, and the surface hardness of the roll body was measured to be 98-102 HSD, and both the ultrasonic testing and the metallographic structure met the requirements. The service life of the cold rolling roll prepared ...

Embodiment 3

[0044] Processing step in embodiment 3 is identical with embodiment 1, and its difference is:

[0045] The design targets for the chemical components and mass percentages of the cold rolling rolls described in this example are: C 0.8-0.9%, Si 0.8-0.9%, Mn 0.5-0.6%, Cr 3.3-3.5%, Ni 0.5- 0.6%, Mo 0.4~0.5%, V 0.3~0.4%, P≤0.015%, S≤0.015%, the rest is Fe and unavoidable impurities.

[0046] Carry out chemical composition analysis to the electroslag steel ingot that step A obtains, obtain the chemical composition and its mass percentage composition in the electroslag steel ingot to be: C 0.9%, Si 1.0%, Mn 0.35%, Cr 2.0%, Ni 0.2%, Mo 0.8%, V 0.1%, P 0.01%, S 0.02%.

[0047] The cold rolled roll obtained in this example was measured by a dedicated roll Shore hardness tester, and the surface hardness of the roll body was measured to be 97-102 HSD, and the ultrasonic testing and metallographic structure all met the requirements. The service life of the cold roll produced by the inven...

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Abstract

The invention discloses a cold roll for rolling a lithium battery guard plate and a manufacturing method thereof. The cold roll contains the following chemical components in percentage by mass: 0.7-1.0% of C, 0.2-1.0% of Si, 0.2-0.6% of Mn, no more than 0.02% of P, no more than 0.02% of S, 2.0-4.0% of Cr, 0.2-0.6% of Ni, 0.2-0.8% of Mo, 0.1-0.5% of V and the balance of Fe and inevitable impurities. The manufacturing method of the cold roll comprises the processing steps of electroslag steel ingot fusion casting, roll blank forging, quenching and tempering treatment, induction hardening treatment, cold treatment, final heat treatment, machining and the like. The cold roll disclosed by the invention has high hardness and wear resistance; and under the service condition of the same strength, the service life of the cold roll is prolonged by 45-55% in comparison with the service life of the original common chrome steel cold roll, and the roll body case hardness of the cold roll can be up to 97-105 HSD.

Description

technical field [0001] The invention relates to a cold rolling roll and a manufacturing method thereof, in particular to a cold rolling roll for rolling lithium battery protection plates and a manufacturing method thereof. Background technique [0002] As people's requirements for fast and convenient travel methods become stronger and stronger, the use of electric bicycles as a means of transportation is becoming more and more common. The power output of electric bicycles mainly depends on batteries. Currently, the batteries used in electric bicycles mainly include lead-acid batteries and lithium batteries. Traditional batteries are mostly lead-acid batteries, but due to the heavy weight of lead-acid batteries, it is inconvenient to disassemble and transport, and it is easy to cause environmental pollution. When using lithium batteries, which are efficient, light and pollution-free energy storage materials, the electric Bicycles became lighter and therefore more and more po...

Claims

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Application Information

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IPC IPC(8): C22C38/46C21D8/06B21B27/00
Inventor 杨昱东李俊朱学刚孙满臣
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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