Rolling mill guide roller and preparation method thereof

A guide roll and rolling mill technology, applied in the field of rolling mill guide roll preparation, can solve problems such as frequent replacement, guide roll wear, and short life, and achieve improved hardenability, high-temperature wear resistance, high-temperature heat strength, and durability high abrasive effect

Inactive Publication Date: 2015-07-22
HEFEI ORIENT METALLURGICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the disadvantages of the above-mentioned prior art, the present invention provides a rolling mill guide roll and its preparation method to solve the problems of traditional rolling mill guide rolls such as serious wear, short service life, frequent replacement, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation steps of rolling mill guide roll of the present invention are as follows:

[0030] Step 1: Batching and charging: mix scrap steel, iron filings, pig iron, ferromolybdenum, ferrochrome, ferromanganese, ferrosilicon, and ferrovanadium according to the mass percentage of the following chemical components: C: 2.5-2.8%, Cr : 15~17%, Si: 1.2~2.0%, Mn: 0.8~1.0%, Mo: 2~3%, V: 0.5~1.0%, P≤0.03%, S≤0.03%, the average carbon content of the charge According to the lower limit of the specification composition, and the surface of the raw material should be free of oil, sand and debris, and scale that cannot be peeled off. Add the induction Electric furnace, adding ferromanganese and ferrosilicon to the induction furnace during the smelting process;

[0031] Step 2: Alloy smelting: When starting to energize, supply about 60% of the power first, and gradually increase the power to the maximum value after the current impact stops. After the lower furnace material is mel...

Embodiment 1

[0046] Take the production of guide rollers with a diameter of 59mm as an example

[0047] Chemical composition: C: 2.6%, Si: 1.5%, Mn: 0.8%, P≤0.03%, S≤0.03%, Cr: 16%, Mo: 2.5%, V: 0.8%.

[0048] Step 1: Batching and charging: mix scrap steel, iron filings, pig iron, ferromolybdenum, ferrochromium, ferromanganese, ferrosilicon, and ferrovanadium according to the mass percentage of the above chemical components, and the average carbon content of the charge is according to the specification The lower limit of the composition is added, and the surface of the raw material should be free of oil, sand, and scale that cannot be peeled off. Add scrap steel, iron filings, pig iron, ferromolybdenum, ferrochrome, and ferrovanadium to the induction furnace when charging. Add ferromanganese and ferrosilicon to the induction furnace during the smelting process;

[0049] Step 2: Alloy smelting: When starting to energize, supply about 60% of the power first, and gradually increase the power...

Embodiment 2

[0060] Chemical composition: C: 2.5%, Si: 1.8%, Mn: 1.1%, P≤0.03%, S≤0.03%, Cr: 15.5%, Mo: 2.0%, V: 0.9%.

[0061] Step 1: Batching and charging: mix scrap steel, iron filings, pig iron, ferromolybdenum, ferrochromium, ferromanganese, ferrosilicon, and ferrovanadium according to the mass percentage of the above chemical components, and the average carbon content of the charge is according to the specification The lower limit of the composition is added, and the surface of the raw material should be free of oil, sand, and scale that cannot be peeled off. Add scrap steel, iron filings, pig iron, ferromolybdenum, ferrochrome, and ferrovanadium to the induction furnace when charging. Add ferromanganese and ferrosilicon to the induction furnace during the smelting process;

[0062] Step 2: Alloy smelting: When starting to energize, supply about 60% of the power first, and gradually increase the power to the maximum value after the current impact stops. After the lower furnace mater...

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Abstract

The invention discloses a rolling mill guide roller and a preparation method thereof. The rolling mill guide roller comprises the following components in percentage by mass: 2.5-2.8% of C, 15-17% of Cr and the balance of Fe, wherein the mass percentage ratio of Cr to C is 5-7. The preparation method of the rolling mill guide roller comprises the following steps: preparing and loading the materials, smelting alloy, performing fine casting, annealing, performing rough processing, quenching, tempering, and performing fine processing. The rolling mill guide roller and the preparation method disclosed by the invention have the advantages that the high-temperature wearing resistance, the high-temperature heat resistance, the thermal stability and the like of a guide roller material can be improved.

Description

technical field [0001] The invention relates to a rolling mill guide roll and a preparation method thereof, which are applied in the field of rolling mill guide roll preparation. Background technique [0002] The guide roller is a part that causes the plastic deformation of the rolled steel during the rolling process of the section steel. It mainly bears the dynamic and static loads and wear during rolling. The impact makes the service life of the guide roller short, the consumption is large, and the replacement is frequent, and it has become one of the bottlenecks restricting the production of steel products. [0003] At present, the guide rolls of rolling mills are mostly made of austenitic heat-resistant steel. This material has good high temperature stability and toughness, but its high temperature wear resistance is poor, resulting in serious product wear and short service life. The preparation method of the guide roll is also relatively complicated, and the life of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C33/04
CPCC22C38/22C21D1/18C22C33/04C22C38/02C22C38/04C22C38/18C22C38/24
Inventor 赵家柱
Owner HEFEI ORIENT METALLURGICAL EQUIP
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