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Forging electroslag composite high-speed steel roll and manufacturing method thereof

A manufacturing method and technology of high-speed steel, applied in the field of roll manufacturing, can solve the problems of reducing the surface roughness of work rolls, reducing the operating rate of cold rolling mills, increasing production costs, etc., achieving excellent wear resistance and high roughness retention ability, Effect of improving hardenability and heat strength, improving hardness and wear resistance

Inactive Publication Date: 2017-06-23
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the above-mentioned chromium steel series cold rolling rolls are rolling thin plates or silicon steel sheets, slippage often occurs between the work rolls and the rolled material during the rolling process; shortly after the work rolls are used, the surface of many work rolls is rough The degree of sharp decrease will directly affect the surface quality of the rolled plate and the qualified rate of the product
These conditions are caused by the poor wear resistance of the work rolls and poor surface roughness retention
Due to the limitation of the material itself, conventional high-carbon chromium steel cold rolls are difficult to have good anti-accident ability while having high wear resistance. environment, the limitations of conventional high-carbon chromium steel cold roll materials are also highlighted
At present, these problems are generally solved by frequently replacing work rolls or texturizing and chrome-plating work rolls, but these methods will not only reduce the operating rate of the cold rolling mill and affect the production schedule, but also the texturing and chrome-plating of work rolls are expensive and increase production. Cost, but also lead to environmental pollution, not suitable for large-scale, long-term application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A forged electroslag composite high-speed steel roll. The chemical composition and mass percentage of the outer layer of the cold roll are designed to target: C 0.9-1.0%, Si 0.4-0.6%, Mn 0.4-0.9%, Cr 5.0 ~8.0%, Mo 3.8~4.0%, V 1.5~2.0%, W 0.90~2.00%, Ni 0.5~0.6%, P≤0.02%, S≤0.02%, the rest is Fe and inevitable impurities. The core material is: C 0.8~1.00%, Si 0.40~0.80%, Mn 0.40~1.00%, Cr2.00~6.00%, Mo 0.15~0.70%, V 0.05~0.20%, Ni≤0.80%, P≤0.02 %, S≤0.02%.

[0032] The manufacturing method of the cold roll includes the following process steps:

[0033] A. Smelting cylindrical steel ingots: smelt the required raw materials in a smelting furnace at a smelting temperature of 1580~1680°C, which is 1630°C in this embodiment, and then put the molten steel in the refining furnace to start refining the molten steel. The temperature is 1600-1800°C, which is 1650°C in this embodiment. After the refining is completed, the molten steel is placed in a ladle, and under gas protection con...

Embodiment 2

[0043] The process steps in Example 2 are the same as those in Example 1, and the difference from Example 1 is:

[0044] In this embodiment, the design goals of the chemical composition of the outer layer of the hot roll and its mass percentage are:

[0045] C 1.2~1.3%, Si 0.60~0.9%, Mn 0.40~0.9%, Cr 10.8~12.0%, Mo 3.8~4.0%, V 2.8~3.0%, W 1.4~1.5%, Ni 0.4~0.6%, P≤ 0.015%, S≤0.015%, the rest is Fe and inevitable impurities. The design goals of the core chemical composition and its mass percentage content are: C 0.40~0.80%, Si0.20~0.80%, Mn 0.20~1.00%, Cr 0.80~1.20%, Mo 0.15~0.60%, Ni≤0.80 %, P≤0.02%, S≤0.02%.

[0046] After the chemical composition analysis of the electroslag composite steel ingot, the chemical composition and its mass percentage in the outer layer of the electroslag steel ingot are: C 1.26%, Si 0.8%, Mn 0.61%, Cr 11.0%, Mo 3.9%, V 3.0%, W 1.2%, Ni 0.4%, P 0.014%, S 0.003%, the rest is Fe and inevitable impurities. The core chemical components and their mass perce...

Embodiment 3

[0053] The process steps in Example 3 are the same as those in Example 1, and the difference from Example 1 is that the chemical composition of the outer layer of the cold roll in this example and the design target of its mass percentage are:

[0054] C 0.9~1.0%, Si 0.9~1.0%, Mn 0.40~0.50%, Cr 11.5~12.0%, Mo 3.8~4.0%, V 3.8~4.0%, W 0.9~1.0%, Ni 0.35~0.45%, P≤ 0.01%, S≤0.01%, the rest is Fe and inevitable impurities. The design goals of the core chemical composition and its mass percentage content are: C 0.40~0.60%, Si0.20~0.80%, Mn 0.20~0.80%, Cr 0.80~1.20%, Mo 0.15~0.60%, Ni≤0.80 %, P≤0.02%, S≤0.02%.

[0055] After chemical composition analysis of the composite electroslag steel ingot, the chemical composition and its mass percentage in the outer layer of the electroslag steel ingot are: C 0.96%, Si 1.0%, Mn 0.56%, Cr 12.0%, Mo 3.8%, V 4.0%, W 1.0%, Ni 0.4%, P 0.01%, S 0.009%, the rest is Fe and unavoidable impurities. The core chemical components and their mass percentages are...

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Abstract

The invention discloses a forging electroslag composite high-speed steel roll and a manufacturing method thereof and belongs to the technical field of roll manufacturing. The outer layer in the roll comprises the chemical components of, by mass, 0.70%-1.50% of carbon, 0.20%-1.20% of silicon, 0.20%-1.00% of manganese, 4.00%-12.00% of chromium, 2.00%-6.00% of molybdenum, 1.00%-4.00% of vanadium, 0.80%-4.00% of tungsten, 0-0.80% of nickel, 0-0.02% of phosphorus, 0-0.02% of sulphur, and the balance iron. The manufacturing method comprises the steps of forming of a cylindrical electrode, forging of a composite billet, preparation of heat treatment, machining and finish heat treatment. According to the obtained finished product, the surface hardness of a roll body is 80-100 HSD, the outer layer has excellent abrasion resistance, high roughness holding ability, high structure stability and the like, the hardness of the core part and the roll neck is 30-45 HSD, and excellent toughness and high tensile strength are achieved.

Description

Technical field [0001] The invention relates to a forged electroslag composite high-speed steel roll and a manufacturing method thereof, and belongs to the technical field of roll manufacturing. Background technique [0002] As an important tool in the steel rolling industry, rolls are the most important consumable part of steel rolling equipment. The roll is a working part that is formed by extruding metal under different conditions. The roll body is required to have high wear resistance, high impact strength, and high structural stability, while the roll neck needs to have good The toughness and tensile strength. In order to meet the different needs of roll body and roll neck in use, and to reduce manufacturing costs, a variety of composite methods are usually used: such as centrifugal composite, full flush composite, CPC composite, electroslag fusion, rotating electroslag composite and other technologies. Among them, the core of the semi-high-speed steel and high-speed steel...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/12C22C38/08C22C38/44C22C38/46C22B9/18B22D13/02B21J5/02C21D9/38
CPCC22C38/02B21J5/02B22D13/02C21D9/38C22B9/18C22C38/04C22C38/08C22C38/12C22C38/18C22C38/44C22C38/46
Inventor 杨昱东刘娣朱学刚袁乃博孙满臣杨保中党坤会葛晓红
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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