Low crack type high speed steel roll and its centrifugal casting method

A technology of centrifugal casting and high-speed steel, which is applied in the field of steel rolling, which can solve the problems of high performance requirements, harsh use conditions of rolls, and easy cracks, etc., and achieve high strength and hardness, good economic benefits, good toughness and wear resistance.

Inactive Publication Date: 2006-07-19
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide range of solidification temperature, low thermal cracking resistance, and the mechanical stress caused by the centrifugal pressure and the vibration of the centrifuge during the centrifugal casting process, the centrifugally cast high-speed steel rolls are prone to cracks
The use conditions of the roll are harsh, and the performance requirements are high. Welding repairs are not allowed on the working surface, and the appearance of cracks directly leads to the scrapping of the roll.

Method used

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  • Low crack type high speed steel roll and its centrifugal casting method
  • Low crack type high speed steel roll and its centrifugal casting method
  • Low crack type high speed steel roll and its centrifugal casting method

Examples

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Effect test

Embodiment 1

[0049] The low-crack high-speed steel roll of this embodiment is smelted in an intermediate-frequency induction furnace with a capacity of 1000 kilograms, and its manufacturing process steps are:

[0050] ①Heating and melting ordinary steel scrap, ferrochrome, ferrotungsten, ferrovanadium, ferromolybdenum and nickel plates, and adding carbon with pig iron.

[0051] ② Adjust the composition before the furnace and raise the temperature to 1640°C, add 0.7% ferrosilicon with a silicon content of 75% and 0.5% ferromanganese with a manganese content of 78% for pre-deoxidation, add 0.2% aluminum for final deoxidation, and then leave the furnace .

[0052] ③Crush the compound modifier containing rare earth, potassium and magnesium into small pieces with a particle size of less than 18mm, and after drying at 220°C, place it at the bottom of the ladle, and perform compound modification treatment on molten steel by pouring into the ladle.

[0053] ④ Manufacture high-speed steel rolls by...

Embodiment 2

[0060] The low-crack high-speed steel roll of the present embodiment is smelted in an intermediate-frequency induction furnace with a capacity of 3000 kilograms, and its manufacturing process steps are:

[0061] ①Heating and melting ordinary steel scrap, ferrochrome, ferrotungsten, ferrovanadium, ferromolybdenum and nickel plates, and adding carbon with graphite.

[0062] ② Adjust the composition before the furnace and raise the temperature to 1605°C, add 0.6% ferrosilicon with a silicon content of 75% and 0.8% ferromanganese with a manganese content of 78% for pre-deoxidation, add 0.15% aluminum for final deoxidation, and then leave the furnace .

[0063] ③Crush the composite modifier containing rare earth, potassium and magnesium into small pieces with a particle size of less than 18mm, and after drying at 200°C, place it at the bottom of the ladle, and perform composite modification on the molten steel by pouring into the ladle.

[0064] ④ Manufacture high-speed steel roll...

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Abstract

The invention discloses a low-crackle type high speed steel roll and its centrifugal casting method, wherein the steel comprises the following chemical constituents (by weight percent): C 1.5-2.0%, W 3.0-6.0%, Mo 1.5-3.0%, V 3.0-10.0%, Cr 3.0-10.0%, Ni 1.5-3.0%, Mn<1.5%, Si<1.5%, RE 0.08-0.20%, K 0.05-0.15%, Mg 0.04-0.10%, wherein 0.20 B22D 13 / 12 C22C 38 / 18 1 13 2 2006 / 1 / 19 1803339 2006 / 7 / 19 1331626 2007 / 8 / 15 2007 / 8 / 15 2007 / 8 / 15 Zhengzhou Institute of Aeronautical Industry Management Henan 450005 Fu Hanguang Jiang Zhiqiang Shi Jinfa li zhengjian 61200 The Patent Agency of Xi'an University of Communications No.28, Xianning, Road, the City of Xi'an, Shanxi Province 710049

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a roll used for various rolling mills, in particular to a low-crack high-speed steel roll and a centrifugal casting method thereof. Background technique [0002] High-speed steel rolls use high-speed steel with high hardness, especially good red hardness, wear resistance and hardenability, as the working layer of the roll, and forged steel, cast steel or cast iron with toughness that meets the requirements as the core material of the roll. High-performance rolls that combine working layers and cores metallurgically or in sets. U.S. Patent US6206814 discloses a method for producing high-speed steel rolls by Continuous Pouring Process for Cladding (CPC). The chemical composition of the rolls is as follows: C: 0.9-1.5%, Si: 0.3-1.0%, Mn: 0.3-1.0%, Cr: 4.0-10.0%, Mo: 2.0-8.0%, V: 0.5-5.0%, the rest is iron and unavoidable trace impurities. The high-spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/12C22C38/18
Inventor 符寒光蒋志强施进发
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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