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Heat treatment method for high-speed steel for rollers

A heat treatment method and high-speed steel technology, applied in the field of iron and steel metallurgy, can solve the problems of high energy consumption, complex process, low efficiency, etc., and achieve the effects of simple production process, good wear resistance and high hardness

Inactive Publication Date: 2012-11-07
无锡市钻通工程机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of complicated process, high energy consumption and low efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015]A heat treatment method for high-speed steel for rolls, the chemical composition of the high-speed steel consists of the following components in weight percentage: C: 3.2, W: 1.6, Mo: 5.0, V: 3.0, Cr: 8.0, Al: 0.4 , Ni: 2.2, Co: 7.5, Nb: 0.2, Ti: 0.4, Ce: 0.4, Zr: 0.20, Si<0.8, Mn<1.5, S<0.03, P<0.04, the rest is Fe, the preparation of the high speed steel The process steps are: ① Mix ordinary steel scrap, pig iron, ferro-tungsten, ferro-molybdenum, ferro-vanadium, ferro-chromium, ferro-niobium, ferro-titanium, nickel plate and metal cobalt into the electric furnace for heating and melting according to the above-mentioned composition requirements; ② adjust before the furnace After the composition is qualified, the temperature is raised to 1580°C-1630°C, and 0.3% of the weight of the molten steel is added to Al for deoxidation and alloying, and then it is released from the furnace; After drying as follows, place it at the bottom of the ladle, and use the method of pouring...

Embodiment 2

[0018] A heat treatment method for high-speed steel for rolls, the chemical composition of the high-speed steel consists of the following components in weight percentage: C: 3.6, W: 1.2, Mo: 7.0, V: 2.0, Cr: 10.0, Al: 0.1 , Ni: 2.6, Co: 6.5, Nb: 0.4, Ti: 0.2, Ce: 0.6, Zr: 0.05, Si<0.8, Mn<1.5, S<0.03, P<0.04, the rest is Fe, the preparation of the high speed steel The process steps are: ① Mix ordinary steel scrap, pig iron, ferro-tungsten, ferro-molybdenum, ferro-vanadium, ferro-chromium, ferro-niobium, ferro-titanium, nickel plate and metal cobalt into the electric furnace for heating and melting according to the above-mentioned composition requirements; ② adjust before the furnace After the composition is qualified, the temperature is raised to 1580°C-1630°C, and 0.8% of the weight of the molten steel is added to Al for deoxidation and alloying, and then it is released from the furnace; After drying as follows, place it at the bottom of the ladle, and use the method of pouri...

Embodiment 3

[0021] A heat treatment method for high-speed steel for rolls, the chemical composition of the high-speed steel consists of the following components in weight percentage: C: 3.4, W: 1.4, Mo: 6.0, V: 2.5, Cr: 9.00, Al: 0.25 , Ni: 2.4, Co: 7.0, Nb: 0.3, Ti: 0.3, Ce: 0.5, Zr: 0.12, Si<0.8, Mn<1.5, S<0.03, P<0.04, the rest is Fe, the preparation of the high speed steel The process steps are: ① Mix ordinary steel scrap, pig iron, ferro-tungsten, ferro-molybdenum, ferro-vanadium, ferro-chromium, ferro-niobium, ferro-titanium, nickel plate and metal cobalt into the electric furnace for heating and melting according to the above-mentioned composition requirements; ② adjust before the furnace After the composition is qualified, the temperature is raised to 1580°C-1630°C, adding 0.6% of the weight of Al to the molten steel for deoxidation and alloying, and then out of the furnace; the modifier and cerium-based rare earth magnesium alloy are broken into small pieces with a particle size o...

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Abstract

The invention discloses a heat treatment method for high-speed steel for rollers. The chemical composition of the high-speed steel consists of the following components in percentage by weight: C: 3.2 to 3.6; W: 1.2 to 1.6; Mo: 5.0 to 7.0; V: 2.0 to 3.0; Cr: 8.0 to 10.0; Al: 0.1 to 0.4; Ni: 2.2 to 2.6; Co: 6.5 to 7.5; Nb: 0.2 to 0.4; Ti: 0.2 to 0.4; Ce: 0.4 to 0.6; Zr: 0.05 to 0.20; Si: less than 0.8; Mn: less than 1.5; S: less than 0.03; P: less than 0.04; and the balance of Fe. After the high-speed steel is cast to form a billet and the billet is roughly machined, the billet is quenched, the quenching process is carried out when a furnace is heated to 1260 DEG C to 1280 DEG C, the temperature is kept for 3 to 5 hours, the billet is then quenched in oil, and is tempered after being quenched, the tempering process is carried out when the furnace is heated to 620 DEG C to 650 DEG C, the temperature is kept for 5 to 7 hours, the furnace is cooled and then heated to 610 DEG C to 630 DEG C again, the temperature is kept for 5 to 7 hours, and after air cooling and tempering, finish machining is carried out, so that a roller, the dimensional precision and surface roughness of which come up to requirements, is obtained.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a heat treatment method for high-speed steel. Background technique [0002] Rolls are one of the main spare parts consumed in steel rolling production, and the consumption of rolls is about 5% to 15% of the production cost of steel rolling. If factors such as production downtime, reduced production and increased equipment maintenance due to roll consumption are considered, the proportion of production costs will be even higher. The quality of the roll is not only related to the cost of rolling steel production and the production rate of the rolling mill, but also affects the quality of the rolled material to a large extent. With the development of steel rolling technology, the speed and automation of rolling mills have been continuously improved, and higher requirements have been put forward for the quality of rolls, especially the wear resistance, strength and toughness...

Claims

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Application Information

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IPC IPC(8): C21D6/00C21D1/18C22C38/56
CPCY02P10/20
Inventor 靳玉生
Owner 无锡市钻通工程机械有限公司
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