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High-boron high-speed steel roller material and smelting process thereof

A smelting method and high-speed steel technology, applied in the field of high-speed steel roll materials and their smelting, high-boron high-speed steel roll materials and their smelting fields, can solve the problems of poor process stability and difficulty in popularization and application, and achieve good stability and roll use Safe and easy to handle

Active Publication Date: 2013-03-27
YUNNAN HEAVY EQUIP MFG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, various high-boron high-speed steel roll materials and their smelting methods currently developed have problems such as poor process stability and difficulty in popularization and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A 500 kg intermediate frequency induction furnace is used to smelt high boron high speed steel roll materials. The specific process steps are:

[0035] (1) Prepare materials according to the following mass fractions:

[0036] 74.21% of Q235 steel scrap (chemical composition is the following mass ratio %: 0.14-0.22C, 0.30-0.65Mn, ≤0.30Si, ≤0.050S, ≤0.045P, Fe balance),

[0037] 1.5% ferro-tungsten (chemical composition is the following mass ratio %: 75-85W, ≤0.40C, ≤0.05P, ≤0.08S, ≤0.70Si, ≤0.50Mn, Fe balance),

[0038] 3.3% molybdenum iron (chemical composition is the following mass ratio %: 55-65Mo, ≤0.10C, ≤0.05P, ≤0.10S, ≤1.0Si, ≤0.50Cu, Fe balance),

[0039] 1.0% ferrovanadium (chemical composition is the following mass ratio %: 48-55V, ≤0.40C, ≤0.06P, ≤0.04S, ≤2.0Si, ≤1.5Al, Fe balance),

[0040] 6.5% high-carbon ferrochromium (chemical composition is the following mass ratio %: 62.0-72.0Cr, 7.5-9.0C, ≤0.06P, ≤0.05S, ≤3.0Si, Fe balance),

[0041] 0.5% metallic c...

Embodiment 2

[0055]A 500 kg intermediate frequency induction furnace is used to smelt high boron high speed steel roll materials. The specific process steps are:

[0056] (1) Prepare materials according to the following mass fractions:

[0057] 74.12% of Q235 steel scrap (chemical composition is the following mass ratio %: 0.14-0.22C, 0.30-0.65Mn, ≤0.30Si, ≤0.050S, ≤0.045P, Fe balance),

[0058] 1.8% ferro-tungsten (chemical composition is the following mass ratio %: 75-85W, ≤0.40C, ≤0.05P, ≤0.08S, ≤0.70Si, ≤0.50Mn, Fe balance),

[0059] 3.0% molybdenum iron (chemical composition is the following mass ratio %: 55-65Mo, ≤0.10C, ≤0.05P, ≤0.10S, ≤1.0Si, ≤0.50Cu, Fe balance),

[0060] 1.2% ferrovanadium (chemical composition is the following mass ratio %: 48-55V, ≤0.40C, ≤0.06P, ≤0.04S, ≤2.0Si, ≤1.5Al, Fe balance),

[0061] 6.0% high-carbon ferrochromium (chemical composition is the following mass ratio %: 62.0-72.0Cr, 7.5-9.0C, ≤0.06P, ≤0.05S, ≤3.0Si, Fe balance),

[0062] 0.8% metallic co...

Embodiment 3

[0076] A 500 kg intermediate frequency induction furnace is used to smelt high boron high speed steel roll materials. The specific process steps are:

[0077] (1) Prepare materials according to the following mass fractions:

[0078] 74.06% of Q235 steel scrap (chemical composition is the following mass ratio %: 0.14-0.22C, 0.30-0.65Mn, ≤0.30Si, ≤0.050S, ≤0.045P, Fe balance),

[0079] 1.6% ferro-tungsten (chemical composition is the following mass ratio %: 75-85W, ≤0.40C, ≤0.05P, ≤0.08S, ≤0.70Si, ≤0.50Mn, Fe balance),

[0080] 3.2% ferromolybdenum (chemical composition is the following mass ratio %: 55-65Mo, ≤0.10C, ≤0.05P, ≤0.10S, ≤1.0Si, ≤0.50Cu, Fe balance),

[0081] 1.1% ferrovanadium (chemical composition is the following mass ratio: 48-55V, ≤0.40C, ≤0.06P, ≤0.04S, ≤2.0Si, ≤1.5Al, Fe balance),

[0082] 6.3% high-carbon ferrochromium (chemical composition is the following mass ratio %: 62.0-72.0Cr, 7.5-9.0C, ≤0.06P, ≤0.05S, ≤3.0Si, Fe balance),

[0083] 0.65% metallic co...

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Abstract

The invention provides a high-boron high-speed steel roller material and a smelting process thereof. The smelting process of the high-boron high-speed steel roller material comprises the following steps: firstly, adopting Q235 waste steel, ferrotungsten, ferromolybdenum, ferrovanadium, high carbon ferro-chrome, metal copper, metal aluminum, calcium-silicon alloy, rare earth ferrosilicon magnesium alloy, ferrocolumbium, ferroboron, ferrosilicon, vanadium-nitrogen alloy, zirconium ferrosilicon and ferrotitanium as materials for smelting low-alloy high-speed molten steel in an electric furnace; then, adding the ferrovanadium and part of ferroboron to carry out alloying in a discharging process; finally, adding part of ferroboron and composite modificator in a casting ladle, adding the vanadium-nitrogen alloy, the zirconium ferrosilicon, the ferrosilicon and part of ferroboron in the casting process. The obtained casting piece has a little alloy elements, excellent abrasive resistance and good thermal fatigue resistance. When the high-boron high-speed steel roller material is used as a roller, the service life is prolonged by more than six times relative to a high nickel-chrome infinite cast-iron roller, and prolonged by 20% relative to a high-vanadium high-speed steel roller. Moreover, the roller is safe to use and reliable.

Description

[0001] technical field [0002] The invention relates to a high-speed steel roll material and a smelting method thereof, in particular to a high-boron high-speed steel roll material and a smelting method thereof, and belongs to the technical field of metal wear-resistant materials. Background technique [0003] Rolls are one of the main spare parts consumed in steel rolling production, and the consumption of rolls is about 5% to 10% of the cost of steel rolling production. 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 impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52C22C38/32
CPCY02P10/20
Inventor 郭红星符寒光蒋业华刘忠全窦永平周荣岑启宏雷永平
Owner YUNNAN HEAVY EQUIP MFG GRP
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