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Manufacturing method for high-speed steel working roll at hot continuous rolling finish rolling rear section

A manufacturing method and high-speed steel technology, applied in the field of rolls and manufacturing, to avoid cracking, improve sheet grade, good accident resistance and wear resistance.

Active Publication Date: 2015-02-18
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to further improve the quality level of plates and continuously reduce production costs, iron and steel enterprises have put forward higher requirements for the wear resistance, surface roughness maintenance ability and good accident resistance of the post-finishing products. The improved ICDP rolls are subject to material and The limitation of the process method is difficult to further meet the requirements

Method used

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  • Manufacturing method for high-speed steel working roll at hot continuous rolling finish rolling rear section
  • Manufacturing method for high-speed steel working roll at hot continuous rolling finish rolling rear section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) Smelting: Use pig iron and scrap steel with appropriate alloys as raw materials, and prepare raw materials according to the set chemical composition of the working layer of the roll body and the middle value of the weight percentage of each composition, that is, C 2.75%, Si 1.7%, Mn 0.85%, Cr 3.0%, Ni 3.50%, Mo+V+W+Nb 6.0%, S≤0.05%, P≤0.10% Prepare raw materials. When smelting, put pig iron, scrap steel, and alloys into an induction furnace for smelting. The smelting temperature is 1470 ° C. Add ferrosilicon inoculants before the furnace is released, and the amount added is 1.0% of the weight of molten steel;

[0027] The material of the roll core and roll neck is ductile iron. During smelting, pig iron is used as raw material in an electric furnace. The smelting temperature is 1520°C. Before the furnace is released, an inoculant and a nodularizer are added to the molten iron. The inoculant is ferrosilicon. It is 0.6% of the weight of molten steel, and the nodulizer ...

Embodiment 2

[0035]a) Smelting: Use pig iron and scrap steel with appropriate alloys as raw materials, and prepare raw materials according to the set chemical composition of the working layer of the roll body and the middle value of the weight percentage of each composition, that is, C 2.15%, Si 0.5%, Mn 1.2%, Cr 4.5%, Ni 2.00%, Mo+V+W+Nb 2.00%, S≤0.05%, P≤0.10% Prepare raw materials. When smelting, put pig iron, scrap steel, and alloys into an induction furnace for smelting. The smelting temperature is 1450 ° C. Add ferrosilicon inoculants before the furnace is released, and the amount added is 0.8% of the weight of molten steel;

[0036] The material of the roll core and the roll neck is ductile iron. During smelting, pig iron is used as the raw material for smelting in an electric furnace. The smelting temperature is 1500°C. Before the furnace is released, an inoculant and a nodularizer are added to the molten iron. The inoculant is ferrosilicon. It is 0.5% of the weight of molten steel...

Embodiment 3

[0044] a) Smelting: Use pig iron and scrap steel with appropriate alloys as raw materials, and prepare raw materials according to the set chemical composition of the working layer of the roll body and the middle value of the weight percentage of each composition, that is, C3.50%, Si 2.00%, Mn 0.50%, Cr 1.50%, Ni 5.0%, Mo+V+W+Nb 10.0%, S≤0.05%, P≤0.10% Prepare raw materials. When smelting, put pig iron, scrap steel, and alloys into an induction furnace for smelting. The smelting temperature is 1550 ° C. Add ferrosilicon inoculants before the furnace is released, and the amount added is 0.6% of the weight of molten steel;

[0045] The material of the roll core and roll neck is ductile iron. During smelting, pig iron is used as raw material in an electric furnace. The smelting temperature is 1450°C. Before the furnace is released, an inoculant and a nodularizer are added to the molten iron. The inoculant is ferrosilicon. It is 1.0% of the weight of molten steel, and the nodulizer...

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Abstract

The invention discloses a manufacturing method for a high-speed steel working roll at a hot continuous rolling finish rolling rear section. The working layer of a roll body comprises the following chemical components in percentages by weight: 2.00-3.50% of C, 0.40-2.00% of Si, 0.50-1.20% of Mn, 1.50-4.50% of Cr, 2.00-5.00% of Ni, 2.00-10.00% of Mo, V, W and Nb, 0-0.05% of S, 0-0.10% of P, and the balance of Fe and unavoidable impurities. The manufacturing method comprises the steps of smelting, inoculation and spheroidizing and pouring, and heat treatment. Through the alloy compositions with reasonable design and the production technology, a special graphite and metallographic structure is obtained. According to the high-carbon high-speed steel roll at the hot continuous rolling finish rolling rear section, the quality of rear surface of a machine under the roll can be effectively controlled, and meanwhile the abrasive resistance and heat cracking resistance of the roll are improved.

Description

technical field [0001] The invention relates to a roll and a manufacturing method, in particular to a manufacturing method of a high-speed steel work roll used in the post-finishing section of hot continuous rolling. Background technique [0002] ICDP rolls came out in the 1930s and are mainly used for strip steel hot rolling work rolls. Because they contain more alloy elements, they are generally not produced by integral casting. Restricted by equipment, the early ICDP rolls were produced by reverberatory furnace smelting and full flushing compounding. Until the horizontal centrifuge was successfully developed and put into use, at the same time, the use of power frequency induction furnace melting equipment improved the quality of centrifugal compounding ICDP rolls. . The improved ICDP roll developed on the basis of the common ICDP roll adds special carbide-forming elements to increase the wear-resistant particles with high microhardness in the structure, so that the wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/02B22D19/16C22C37/10C21D5/00
CPCB22D13/02B22D19/16C21D5/00C22C37/04C22C37/08C22C37/10
Inventor 刘娣杨昱东朱志磊王延青高梦洁
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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