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Impact-resistance double-roller roughing roll and manufacturing method thereof

A manufacturing method and rough roll technology, which is applied in the field of metallurgical rolls, can solve the problems of low heat resistance and impact resistance, and achieve high wear resistance and roll neck strength, excellent wear resistance, and good rolling effect

Inactive Publication Date: 2011-02-16
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hardness of this material has been improved, its heat resistance and impact resistance are still low

Method used

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  • Impact-resistance double-roller roughing roll and manufacturing method thereof
  • Impact-resistance double-roller roughing roll and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of impact-resistant two-roller rough roll is used for raw material proportioning, high-quality steel scrap and alloying elements are selected, and the ingredients are formulated according to the following components and weight percentages:

[0016] C

Si

mn

Cr

Mo

V

Ni

P

S

0.56

0.82

0.55

4.29

0.6

0.29

0.83

0.015

0.013

[0017] The rest is Fe and unavoidable impurities.

[0018] In this embodiment, smelting in an electric arc furnace and a refining furnace reduces or eliminates harmful elements, improves the purity of molten steel, and provides a basis for high-performance requirements of rolls. After the roll is unpacked, it is directly subjected to preparatory heat treatment to prepare for the heat treatment of the finished product. Preliminary heat treatment includes two processes of normalizing and tempering. The normalizing temperature is 920°C and the temperin...

Embodiment 2～ Embodiment 6

[0021] 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, roll material are shown in the table below:

[0022]

[0023]

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PUM

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Abstract

The invention discloses an impact-resistance double-roller roughing roll, comprising the following chemical compositions in percentage by weight: 0.30-0.65% of C, 0.35-1.20% of Si, 0.30-1.00% of Mn, 3.00-5.50% of Cr, 0.30-1.20% of Ni, 0.50-1.50% of Mo, 0.20-2.00% of V, less than or equal to 0.02% of S and less than or equal to 0.02% of P, and the balance of Fe and unavoidable impurities. The surface hardness of the double-roller roughing roll of the invention is 65-75HSD and the double-roller roughing roll has the characteristics of fine high temperature impact resistance property, thermal fatigability resistance and abrasive resistance.

Description

technical field [0001] The invention relates to a metallurgical roll, in particular to a two-roll rough roll used at the entrance of a rolling mill when producing a hot-rolled strip. Background technique [0002] The service conditions of the two-roll rough rolling work rolls are relatively harsh, generally for reversible rolling, the rolling speed is slow, the rolling temperature is high, the entrance billet is thick, and there is a large impact when biting, so the two-roll rough rolling rolls are required to have high Excellent thermal fatigue and impact resistance. The two-roller rough roll has always used alloy cast steel and alloy forged steel roll, which has low alloy content (total alloy content <3%), low hardness (38-45HSD), less matrix solid solution alloy elements, and matrix microhardness lower. The comprehensive factors lead to poor wear resistance, severe thermal crack expansion, poor impact resistance, fatigue resistance and wear resistance, low millimeter...

Claims

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Application Information

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IPC IPC(8): C21D9/38B21B27/00C22C38/46
Inventor 袁乃博孙格平马大江
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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