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Working roll for automobile sheet cold rolling and manufacturing method thereof

A technology of cold-rolled work rolls and manufacturing methods, which is applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems affecting the quality of the board surface, etc., achieve the effects of improving anti-accident performance, realizing localization, and increasing the strength of the matrix

Active Publication Date: 2011-04-06
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production of cold-rolled work rolls for automobile sheets, due to macro-segregation, micro-segregation, grinding, texturing, etc., and after the surface of the roll body is chrome-plated, patterns or ripples will appear on the surface of the roll. It will be copied to the surface of the rolled steel plate, seriously affecting the quality of the plate surface

Method used

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  • Working roll for automobile sheet cold rolling and manufacturing method thereof
  • Working roll for automobile sheet cold rolling and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The manufacturing method of the cold-rolled work roll of the present embodiment comprises the following steps:

[0028] ① Refining steel to make the chemical composition and content of the steel reach the required range, and use related production processes to make cold-rolled billets. The specific steps are as follows: when refining steel, use electric arc furnace and LF / VD refining furnace to smelt, die cast into electrodes, then anneal the electrode rods, and then use electroslag remelting to make electroslag ingots.

[0029] Through final assay, the chemical composition and percentage composition of the present embodiment electroslag ingot are as follows:

[0030] C

Si

mn

Cr

Mo

V

Ni

P

S

0.85

0.95

0.26

4.89

0.33

0.03

0.16

0.017

0.003

[0031] The rest is Fe and unavoidable impurities. After the composition is qualified, the electroslag ingot is heated, forged into a...

Embodiment 2～ Embodiment 8

[0038] The manufacturing method of each embodiment is identical with embodiment 1, and the chemical composition and percentage composition and the surface hardness of finished product in process condition, cold roll material are shown in the table below:

[0039]

[0040]

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Abstract

The invention discloses a cold-rolling working roll for rolling a high-quality automobile sheet, which comprises the following chemical constituents in percentage by weight: 0.70-1.00% of C, 0.4-1.50% of Si, 0.20-1.00% of Mn, 4.50-6.50% of Cr, 0.20-1.00% of Mo, 0.05-0.50% of V, 0.20-1.50% of Ni, no more than 0.025% of S and no more than 0.025% of P. The roll blank is subject to an electroslag ingot manufacturing process in a special electroslag mode, wherein the quenching holding temperature in heat treatment is 940-1020 DEG C, the cold treatment temperature is from 90 to 50 DEG C, the treatment time is 2-8h, the tempering holding temperature is 120-145 DEG C, and the holding time is 60-150h. The surface hardness of the cold-rolling roll is 90-100 HSD. The manufactured cold-rolling working roll has fine roll-surface structural homogeneity and overall performance, thereby meeting the rolling requirements of the high-quality automobile sheet.

Description

technical field [0001] The invention relates to a cold-rolled work roll for manufacturing automobile plates and a manufacturing method thereof. Background technique [0002] With the continuous innovation of steel rolling technology, cold-rolled plates are developing towards thin plates, high strength, and high precision. The surface quality requirements of plates for automobiles and household appliances are becoming increasingly stringent. The production technology level of high-grade automotive plates represents the peak of the steel manufacturing industry. techinque level. Before 2000, my country's high-grade automotive sheets mainly relied on imports. In recent years, with the completion and use of modern cold rolling mills, many domestic enterprises have the ability to mass-produce cold-rolled automotive sheets. [0003] The precision requirements of the cold-rolled automotive sheet are relatively high, and the surface appearance of the sheet requires good brightness a...

Claims

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Application Information

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IPC IPC(8): C22C38/46C21D9/38
Inventor 韩明高杨保中朱学刚党坤会
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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