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Compound processing method of boron-containing high-speed steel roller material

A composite treatment, high-speed steel technology, applied in the field of wear-resistant materials, can solve the problems of insignificant changes in the form and distribution of carbon and boron compounds, reduce the strength and toughness of the rolls, and affect the normal operation of equipment, and improve the form and distribution of carbon and boron compounds. , Improve the strength and toughness, the effect of small solidification structure

Inactive Publication Date: 2011-05-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, after boron is added to high-speed steel rolls, brittle carboron compounds are prone to appear, and the common methods are used to treat boron-containing high-speed steel roll materials, and the shape and distribution of carboborate compounds do not change significantly.
The appearance of carbon-boron compounds, although it can increase the hardness of the roll material, is beneficial to improving the wear resistance of the roll, but it significantly reduces the strength and toughness of the roll, resulting in the roll being prone to peeling and even roll breakage accidents during use, affecting the normal operation of the equipment

Method used

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Effect test

Embodiment 1

[0026] The material of the present invention adopts 1000 kilograms of medium-frequency induction furnace melting, and concrete composite treatment steps are as follows:

[0027]1) Melt the high-speed steel roll material in the electric furnace first. When the composition of molten steel is adjusted to pass, add silicon-calcium alloy accounting for 0.15% of the total mass of molten steel for pre-deoxidation and desulfurization. The mass fraction (%) of silicon-calcium alloy is: 55-65Si , Ca>31, Al<2.4, C<0.8, P≤0.04, S≤0.06, and the balance is Fe. Then add 0.15% aluminum for final deoxidation, and finally raise the temperature of molten steel to 1630°C and then release it from the furnace.

[0028] 2) During the process of molten steel coming out of the furnace, the ferroboron particles are washed into the ladle with the flow. The amount of ferroboron particles flushed into the ladle accounts for 3.0% of the total mass of molten steel. The size of ferroboron particles is 2-6m...

Embodiment 2

[0032] The material of the present invention adopts 500 kilograms of medium-frequency induction furnace melting, and concrete composite treatment steps are as follows:

[0033] 1) Melt the high-speed steel roll material in the electric furnace first. When the composition of molten steel is adjusted to pass, add silicon-calcium alloy accounting for 0.25% of the total mass of molten steel for pre-deoxidation and desulfurization. The mass fraction (%) of silicon-calcium alloy is: 55-65Si , Ca≥31, Al≤2.4, C≤0.8, P≤0.04, S≤0.06, the balance Fe. Then add 0.08% aluminum for final deoxidation, and finally raise the temperature of molten steel to 1648°C and then release it from the furnace.

[0034] 2) During the process of molten steel coming out of the furnace, the ferroboron particles are washed into the ladle with the flow. The amount of ferroboron particles flushed into the ladle accounts for 3.5% of the total mass of molten steel. The size of ferroboron particles is 2-6mm. Befo...

Embodiment 3

[0038] The material of the present invention adopts 1000 kilograms of medium-frequency induction furnace melting, and concrete composite treatment steps are as follows:

[0039] 1) Melt the high-speed steel roll material in the electric furnace first. When the composition of molten steel is adjusted to pass, add silicon-calcium alloy accounting for 0.18% of the total mass of molten steel for pre-deoxidation and desulfurization. The mass fraction (%) of silicon-calcium alloy is: 55-65Si , Ca≥31, Al≤2.4, C≤0.8, P≤0.04, S≤0.06, the balance Fe. Then add 0.12% aluminum for final deoxidation, and finally raise the temperature of the molten steel to 1630-1650°C before it is released from the furnace.

[0040] 2) During the process of molten steel coming out of the furnace, the ferroboron particles are washed into the ladle with the flow. The amount of ferroboron particles flushed into the ladle accounts for 3.2% of the total mass of molten steel. The size of ferroboron particles is...

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Abstract

The invention discloses a compound processing method of a boron-containing high-speed steel roller material, belonging to the technical field of wear-resistant materials. The method comprises the following steps: smelting a high-speed steel roller material in an electric furnace, deoxidizing and desulfurizing the molten steel, raising the temperature to 1630-1650 DEG C, discharging, heating to 1000-1100 DEG C, crushing into boron iron particles of 2-6mm, and flushing the boron iron particles into a ladle along with the flow; previously adding a compound modifier, which contains rare earth, potassium, magnesium, strontium, calcium and various other microelements, into the bottom of the ladle; 3-5 minutes after the discharge of the molten steel, carrying out argon-blowing purifying treatment on the molten steel at the bottom of the ladle for 6-10 minutes; and after the temperature of the molten steel reaches 1460-1480 DEG C, casting the molten steel to obtain the roller. The roller has the characteristics of fewer inclusions, high mechanical properties, long service life and the like, and has high economic benefit for popularization and application.

Description

technical field [0001] The invention relates to processing methods for various roll materials, in particular to a composite processing method for boron-containing high-speed steel roll materials, and belongs to the technical field of wear-resistant materials. Background technique [0002] Rolls are the only indispensable tools in the iron and steel production process chain, whether for the production of plate and strip, or rolled tubes, rods and wires. In recent years, the increasingly fierce global competition in the hot-rolled plate, strip, rod and wire market has brought severe challenges to domestic roll manufacturers, and the development of high-performance rolls has received increasing attention. Among them, the boron-containing high-speed steel roll material developed by replacing some expensive alloy elements such as vanadium, molybdenum, tungsten, niobium, and cobalt with cheap boron elements has the characteristics of high hardness and good wear resistance. Its pro...

Claims

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Application Information

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IPC IPC(8): C22C33/06C22C38/00
Inventor 符寒光蒋业华郭红星周荣雷永平岑启宏窦永平
Owner BEIJING UNIV OF TECH
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