Compound high speed steel roll and its making process

A composite roll and high-speed steel technology, which is applied in the field of high-speed steel composite roll and its manufacturing, can solve problems such as roll cracks, affecting the use of rolls, and large differences in carbide density

Inactive Publication Date: 2006-10-18
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because high-speed steel contains more alloying elements such as W, Cr, Mo, and V, and the density difference between these elements and the carbides formed is very large, under ordinary centrifugal casting conditions, the alloy elements of high-speed steel rolls are seriously segregated. , the oute

Method used

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  • Compound high speed steel roll and its making process
  • Compound high speed steel roll and its making process

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Effect test

Embodiment 1

[0051] The high-speed steel composite roll of this embodiment. The outer diameter of the roll is Φ370mm, the thickness of the roll body is 70mm, and the single-side processing amount of the outer layer of the roll is 8mm. The roll body and roll core of the high-speed steel composite roll are smelted in a 500kg and 1000kg intermediate frequency induction furnace respectively. The manufacturing process steps are:

[0052] (1) Melting of high-speed steel molten steel for roll body

[0053] ①Mix ordinary steel scrap, pig iron, ferromolybdenum, ferro-niobium and ferrochrome according to the above composition requirements, put them into the furnace for heating and melting, add ferrosilicon and ferromanganese after the molten steel is melted, and add ferro-vanadium before leaving the furnace;

[0054] ② After adjusting the composition before the furnace, the temperature is raised to 1580°C, and 0.23% Al is added to the molten steel for deoxidation, and then it is released from the fu...

Embodiment 2

[0071] The outer diameter of the high-speed steel composite roll of the present invention is Φ350mm, the thickness of the roll body is 65mm, and the unilateral processing amount of the roll outer layer is 8mm. The roll body and the roll core of the high-speed steel composite roll are smelted in an intermediate frequency induction furnace of 500kg and 1000kg respectively, and the manufacturing process steps are as follows: :

[0072] (1) Melting of high-speed steel molten steel for roll body

[0073] ①Mix ordinary steel scrap, pig iron, ferromolybdenum, ferro-niobium and ferrochrome according to the above composition requirements, put them into the furnace for heating and melting, add ferrosilicon and ferromanganese after the molten steel is melted, and add ferro-vanadium before leaving the furnace;

[0074] ② After adjusting the composition before the furnace, the temperature is raised to 1535°C, and 0.18% Al is added to the weight of molten steel for deoxidation, and then it ...

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Abstract

The present invention discloses compound high speed steel roll and its making process. The compound high speed steel roll consists of roll body and roll core compounded through central casting. The roll body is made of high speed steel comprising chemically C 1.8-2.8 (in wt%, same as below), Mo 4.0-8.0, V 3.0-7.0, Nb 1.5-4.0, Cr 6.0-12.0, RE 0.1-0.25, Ti 0.15-0.40, N 0.08-0.20, K 0.06-0.18, Si<2.0, Mn<2.0, S<0.05 and P<0.05, except Fe and inevitable impurity. The roll core is made of high strength nodular cast iron comprising chemically C 3.2-3.6 (in wt%, same as below), Si 1.8-2.4, Mn 0.4-0.8, Ni 0.3-1.2, Cr 0.3-0.8, Mo 0.2-0.5, Mg 0.03-0.08, RE 0.05-0.14, P<0.08 and S<0.03, except Fe and inevitable impurity. The compound high speed steel roll has high wear resistance, simple making process and high production efficiency.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a manufacturing method of a roll, in particular to a high-speed steel composite rolling roll and a manufacturing method thereof. Background technique [0002] Hot rolling rolls are key tools in steel rolling production, and they are used under extremely harsh conditions and must be able to withstand quite strong force and heat. In addition to high strength and toughness to prevent the roll from breaking during use, the surface should also have good wear resistance and heat resistance. A single roll material is difficult to meet the requirements of hot rolls. Composite rolls composed of roll core materials with good strength and toughness and high-speed steel roll body materials with good wear resistance and heat resistance are the main direction of roll development. Commonly used roll compounding methods mainly include: flushing compound casting meth...

Claims

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Application Information

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IPC IPC(8): B21B27/02B22D13/12C21D5/00C21D6/00C21D9/38C22C37/04C22C38/36C22C38/38C22C38/60
Inventor 符寒光蒋志强冯锡兰
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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