A kind of heat-resistant wear-resistant alloy steel and preparation method thereof

An alloy steel, heat-resistant technology, applied in the field of metal materials, can solve the problems of low heat resistance and wear resistance, low wear resistance, etc., to improve strength, toughness, heat resistance, and high temperature wear resistance Effect

Active Publication Date: 2017-11-28
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heat resistance and wear resistance are not high
[0004] CN102618804A, CN102888568A, CN103643171A all contain high Ni, good heat resistance, but not high wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composition and weight percentage of heat-resistant and wear-resistant steel are: C: 0.28%, Cr: 17.5%, Mn: 17.5%, Si: 0.8%, Ti: 0.7%, W: 1.4%, P≤0.02%, S≤0.02 %, Y: 0.15%, Ce: 0.15% and Al: 0.03%, and the balance is Fe.

[0033] Put scrap steel, low-carbon ferrochromium, electrolytic manganese and other raw materials into the electric arc furnace, melt them, fully stir the molten steel, and make slag. Oxygen blowing at 1585°C, liquid pressure 0.8MPa, time 8 minutes; insert 1.2Kg70% aluminum-20% silicon-10% calcium wire per ton of molten steel, add alloy materials according to composition requirements, and add 1% carbon to the liquid surface -50% silicon-49% calcium composite powder, make slag, the slag amount reaches 3.6%, add ferro-titanium and ferro-tungsten after keeping for 20 minutes; pour molten steel into the baked ladle, add 0.2% yttrium to the bottom of the ladle -Cerium-based mixed rare earth, particle size 3~5mm, tapping temperature 1635°C; casting pouri...

Embodiment 2

[0036] Heat-resistant and wear-resistant steel, its composition by weight percentage is: C: 0.3%, Cr: 18%, Mn: 18%, Si: 1.0%, Ti: 0.8%, W: 1.6%, P≤0.02%, S≤ 0.02%, Y: 0.2%, Ce: 0.2%, Al: 0.035%, and the balance is Fe.

[0037] Put scrap steel, low-carbon ferrochrome, electrolytic manganese and other raw materials into the electric arc furnace, melt them, fully stir the molten steel, and make slag. Oxygen blowing at 1590°C, liquid pressure 0.7MPa, time 7 minutes; insert 1.3Kg70% aluminum-20% silicon-10% calcium wire into each ton of molten steel, add alloy materials according to composition requirements, and add 1% carbon to the liquid surface -50% silicon-49% calcium composite powder, make slag, the slag amount reaches 3.7%, add ferro-titanium and ferro-tungsten after keeping for 20 minutes; pour molten steel into the baked ladle, add 0.3% yttrium to the bottom of the ladle -Cerium-based mixed rare earths, particle size 3~5mm, tapping temperature 1630°C; casting pouring tempe...

Embodiment 3

[0040] Heat-resistant and wear-resistant steel, its composition by weight percentage is: C: 0.33%, Cr: 18.5%, Mn: 18.5%, Si: 1.1%, Ti: 0.9%, W: 1.8%, P≤0.02%, S≤ 0.02%, Y: 0.25%, Ce: 0.25%, Al: 0.045%, and the balance is Fe.

[0041] Put scrap steel, low-carbon ferrochrome, electrolytic manganese and other raw materials into the electric arc furnace, melt them, fully stir the molten steel, and make slag. Oxygen blowing at 1600°C, liquid pressure 0.9MPa, time 9 minutes; insert 1.4Kg70% aluminum-20% silicon-10% calcium wire into each ton of molten steel, add alloy materials according to composition requirements, and add 1% carbon to the liquid surface -50% silicon-49% calcium composite powder, make slag, the slag amount reaches 3.9%, add ferro-titanium and ferro-tungsten after keeping for 20 minutes; pour molten steel into the baked ladle, add 0.45% yttrium to the bottom of the ladle -Cerium-based mixed rare earths, particle size 3~5mm, tapping temperature 1635°C; casting pouri...

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Abstract

The invention provides heat-resisting and wear-resisting alloy steel. The heat-resisting and wear-resisting alloy steel is prepared from, by weight, 0.25%-0.35% of C, 17%-19% of Cr, 17%-19% of Mn, 0.6%-1.2% of Si, 0.6%-1.0% of Ti, 1.2%-2.0% of W, 0-0.02% of P, 0-0.02% of S, 0.05%-0.25% of Y, 0.05%-0.25% of Ce, 0.025%-0.05% of Al and the balance Fe. A preparation method of the heat-resisting and wear-resisting alloy steel comprises the steps that scrap steel, low-carbon ferrochromium and electrolytic manganese are placed in a furnace to be molten; oxygen blowing is conducted when the temperature of molten steel is higher than 1580 DEG C; 70% of aluminum, 20% of silicon and 10% of calcium wires are inserted into per ton of molten steel, composite powder containing 1% of carbon, 50% of silicon and 49% of calcium is added onto the liquid surface, slagging is conducted, ferrotitanium and ferrotungsten are added, yttrium-cerium-based mixture rare earth is added to the bottom of a steel ladle, and the tapping temperature is 1620-1640 DEG C; a casting is cast at the temperature of 1530-1580 DEG C; and heat treatment is conducted at the temperature of 1050-1100 DEG C, the casting is placed in water after being discharged out of the furnace, and the water temperature is not higher than 38 DEG C. According to the heat-resisting and wear-resisting alloy steel and the preparation method thereof, through the optimal design of the elements, melt purification and optimization of the heat treatment technique, the steel which is high in heat strength, abrasion resistance and heat resistance is obtained.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a wear-resistant and heat-resistant steel and a preparation method thereof. Background technique [0002] The key components of industrial equipment such as electric power, metallurgy, cement, building materials, and chemical industry are subject to high-temperature oxidation and medium erosion and wear conditions. The high temperature of 1000°C bears the wear of slag at the same time. The grate plate of the cement industry bears the erosion and wear of cement under the high temperature condition of 1000°C. Under the action of medium scouring, the oxide film formed by high temperature oxidation is washed away by abrasion, the new surface is exposed, and the oxide film is formed again, and the newly formed oxide film is worn again, and the cycle repeats. Under high-temperature wear conditions, oxidation and wear interact, so alloy materials are required to be both oxidation-resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C38/38C22C38/28C22C38/22C22C33/06C21D1/18
CPCC21D1/18C22C33/06C22C38/005C22C38/18C22C38/22C22C38/28C22C38/38Y02P10/20
Inventor 郑开宏王海艳王娟董晓蓉农登
Owner GUANGDONG INST OF NEW MATERIALS
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