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A kind of preparation method of high-speed steel roll

A high-speed steel and roll technology, applied in the direction of rolls, metal rolling, metal rolling, etc., can solve the problems of difficult forging, difficult production, uneven structure, etc., achieve excellent wear resistance and anti-seizure resistance, and promote refinement. and uniform distribution, improving red hardness and wear resistance

Active Publication Date: 2021-09-28
石家庄石特轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production of high-speed steel rolls also has many shortcomings. Due to the high alloy content, this has caused difficulties in production, and the cost of high-speed steel rolls is also very high, so it is limited in promotion and use.
In addition, the forging of high-speed steel rolls is difficult, and it is difficult to achieve the desired effect during heat treatment. At the same time, high-speed steel rolls are prone to cause uneven structure, looseness and segregation during production, which reduces the performance of high-speed steel rolls, which affects high-speed steel rolls. development of

Method used

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  • A kind of preparation method of high-speed steel roll
  • A kind of preparation method of high-speed steel roll
  • A kind of preparation method of high-speed steel roll

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preparation example Construction

[0030] One embodiment of the present invention provides a method for preparing a high-speed steel roll. The high-speed steel roll includes an outer layer, an intermediate layer, and a core; the intermediate layer is formed on the inner surface of the outer layer, and the inner layer is formed on the inner surface of the intermediate layer; the preparation method specifically includes the following: Process:

[0031] -Smelting process, respectively smelting the high-speed molten steel in the outer layer of the roll body, the semi-steel molten steel in the middle layer, and the molten iron in the core, for use;

[0032] -casting process, using the high-speed molten steel in the outer layer of the roll body, the semi-steel molten steel in the middle layer, and the molten iron in the core to sequentially pour the outer layer, the middle layer, and the core of the roll; and,

[0033] -Heat treatment process, after 24-48h of pouring of the high-speed steel roll cast slab, take it out ...

Embodiment approach 1

[0044] In one embodiment of this embodiment, a method for preparing a high-speed steel roll specifically includes the following steps:

[0045] S1: Melting process, three intermediate frequency furnaces are used to melt the high-speed molten steel in the outer layer of the roll body, the semi-steel molten steel in the middle layer, and the molten iron in the core, for use;

[0046] S11: Smelting of the outer high-speed molten steel, the outer high-speed molten steel contains the following components: by mass%, C 1.4-2.2%, Si 0.6-1.7%, Mn 0.5-2.0%, V 3.0-4.8%, Ni 0.2-0.7 %, Cr 2.2-5.3%, Nb 0.5-1.0%, Sr 0.001-0.03%, Mo 3.3-6.7%, W 0.03-1.5%, Nd 0.001-0.1%, Zr 0.5-1.5%, N 0.1-0.5%, The balance is composed of Fe and unavoidable impurities; after smelting, 0.2-0.5% of the mass fraction of the outer layer of high-speed steel is added with a modifier, and it is modified at 1640-1660°C. The particle size of the modifier is ≤0.3mm, and the modifier Including silicon bismuth, silicon z...

Embodiment 1

[0056] A preparation method of a high-speed steel roll, specifically comprising the following steps:

[0057] S1: Melting process, three intermediate frequency furnaces are used to melt the high-speed molten steel in the outer layer of the roll body, the semi-steel molten steel in the middle layer, and the molten iron in the core, for use;

[0058] S11: The outer high-speed molten steel is smelted, and the outer high-speed molten steel contains the following components: by mass %, C 1.8%, Si0.9%, Mn 1.1%, V 3.4%, Ni 0.4%, Cr 2.6%, Nb 0.7% , Sr 0.005%, Mo 4.7%, W0.2%, Nd 0.02%, Zr 0.9%, N 0.3%, the balance is composed of Fe and unavoidable impurities; after smelting, add 0.3% of the mass fraction of the outer layer of high-speed steel The modification agent is modified at 1650°C. The particle size of the modification agent is ≤0.3mm. The modification agent includes silicon bismuth, silicon zirconium and silicon germanium with a mass ratio of 13:20:1. The modification agent is c...

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Abstract

The invention provides a method for preparing a high-speed steel roll, which belongs to the technical field of roll preparation, and includes the following steps: separately melting the high-speed molten steel in the outer layer of the roll body, the half-steel molten steel in the middle layer, and the molten iron in the core; pouring the outer layer and the middle layer of the roll in sequence and the core; after 24-48 hours of pouring of the high-speed steel roll billet, take it out and cool it to normal temperature, carry out rough machining, quenching and secondary tempering treatment and finishing, and obtain the high-speed steel roll; wherein, in the casting process, adopt The outer layer of the roll body is cast by ultrasonic-assisted centrifugal casting method, the ultrasonic power is 700-800W, and the gravity multiple is 220-350G. The preparation method of the present invention adopts ultrasonic-assisted centrifugal casting, which can effectively improve the form and distribution of carbides in the solidified structure of high-speed steel, so that a large number of fine, uniform and dispersed MC carbides can be obtained on the outer layer of the roll, and the segregation of alloy elements can be reduced. Improve the comprehensive mechanical properties of the roll.

Description

technical field [0001] The invention belongs to the technical field of roll preparation, and in particular relates to a preparation method of a high-speed steel roll. Background technique [0002] Steel is an indispensable and important material in the development of the national economy, and is widely used in various fields such as construction, shipbuilding, and energy. Along with the economic development, it is well known that steel rolling is a very important field in steel production, and rolls, as an indispensable important part and one of the main consumables in the rolling material production process, consume a huge amount. The consumption of rolls can reflect and affect the quality, production efficiency and cost of the rolled material to a considerable extent. First, the quality of the rolled material decreases. Taking hot-rolled strip steel as an example, the surface wear of the roll will lead to serious surface quality of the strip steel. Defects, dimensional ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B22D13/02B22D27/08C21D9/38B21B27/00C22C38/02C22C38/04C22C38/46C22C38/48C22C38/44C22C38/50
CPCB21B27/00B22D13/02B22D19/16B22D27/08C21D9/38C22C38/001C22C38/002C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 郄韶辉曹军邢步申
Owner 石家庄石特轧辊有限公司
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