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

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

Inactive Publication Date: 2007-08-15
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

Experimental program
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Effect test

Embodiment 1

[0051] The low-crack type high-speed steel roll of the present embodiment is smelted in an intermediate frequency induction furnace with a capacity of 1000 kilograms, and the manufacturing process steps are:

[0052] ①Mix common scrap steel, ferrochromium, ferrotungsten, ferrovanadium, ferromolybdenum and nickel plate to heat and melt, and use pig iron to increase carbon.

[0053] ②After adjusting the components before the furnace, the temperature was raised to 1640℃, 0.7% of ferrosilicon with a silicon content of 75% and 0.5% of ferromanganese with a manganese content of 78% were added for pre-deoxidation, and 0.2% of aluminum was added for final deoxidation, and then the furnace was released. .

[0054] ③Crush the composite modifier containing rare earth, potassium and magnesium to 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 composite modification treatment on the molten steel by the method...

Embodiment 2

[0064] The low-crack type high-speed steel roll of the present embodiment is smelted in an intermediate frequency induction furnace with a capacity of 3000 kilograms, and the manufacturing process steps are:

[0065] ①Mix ordinary scrap steel, ferrochromium, ferrotungsten, ferrovanadium, ferromolybdenum and nickel plate to heat and melt, and carbonize with graphite.

[0066] ②After adjusting the ingredients before the furnace, the temperature was raised to 1605℃, 0.6% of ferrosilicon with a silicon content of 75% and 0.8% of ferromanganese with a manganese content of 78% were added for pre-deoxidation, and 0.15% of aluminum was added for final deoxidation, and then released from the furnace .

[0067] ③Crush the composite modifier containing rare earth, potassium and magnesium to 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 treatment on the molten steel by the method of i...

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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-speed steel roll manufactured...

Claims

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Application Information

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Patent Type & Authority Patents(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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