Low-carbon Al2O3-C sliding material compounded by metal Si/Al and preparation method thereof

An al2o3-c, metal technology, applied in metal processing equipment, manufacturing tools, casting equipment, etc., can solve problems affecting service life, roughening, etc., and achieve energy saving, good oxidation resistance, and low carbon content.

Inactive Publication Date: 2011-04-20
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the continuous promotion and application of new steelmaking and continuous casting technologies in recent years, coupled with the development of high-oxygen steel, calcium-treated steel, ultra-pure steel and other types of steel, the working environment of the skateboard is also facing more severe molten steel erosion, Chemical erosion and greater temperature fluctuations require the slide to be more reliable, long-lived and efficient. Under strong thermal shock and thermochemical erosion, due to differences in casting methods, time, temperature, steel types, throttling and turnaround time, etc. Due to the influence of operating factors, the current high-alumina, aluminum-carbon, aluminum-zirconium-carbon, alkaline, zirconium and metal slide plates used in continuous casting all have cracks, roughening and oxidation to varying degrees, which affects the further development of the service life. Improve, so that it can not better adapt to the needs of new continuous casting technology

Method used

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  • Low-carbon Al2O3-C sliding material compounded by metal Si/Al and preparation method thereof
  • Low-carbon Al2O3-C sliding material compounded by metal Si/Al and preparation method thereof
  • Low-carbon Al2O3-C sliding material compounded by metal Si/Al and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Stir and mix 5 kg of metal Si powder with fineness ≤ 0.038mm and Si content ≥ 98%, and 4 kg of metal Al powder with fineness ≤ 0.088mm and Al content ≥ 98% to form metal Si and Al composite powder , and then select 20 kilograms of tabular corundum fine powder with a specification of less than or equal to 50 microns, 3 kilograms of activated alumina fine powder with a specification of less than or equal to 28 microns, and 3 kilograms of graphite with a fineness of ≤0.038mm and a C content of ≥98%, 2 kg of carbon black with fineness ≤ 0.01mm and C content ≥ 98.5%, 1 kg of B 4 C≥92% boron carbide fine powder, then add metal Si and Al composite powder mixed in advance, and mix in a double-cone mixer to form a mixed powder;

[0054] 2) Take 15 kilograms of 3-2 mm tabular alumina particles, 18 kg of 2-1 mm tabular alumina particles, 16 kg of 1-0.5 mm tabular alumina particles, and 13 kg of 0.5 mm or less tabular corundum particles, and stir and mix them. Take another 4 kg...

Embodiment 2

[0058] 1) 10 kg of metal Si powder with a fineness of ≤0.038mm and a Si content of ≥98%, and 2 kg of metal Al powder with a fineness of ≤0.088mm and an Al content of ≥98%, were stirred and mixed in advance to form metal Si and Al composite powder , and then select 18 kilograms of tabular corundum fine powder with a specification of less than or equal to 50 microns, 5 kilograms of activated alumina fine powder with a specification of less than or equal to 28 microns, 1 kilogram of graphite with a fineness of ≤0.038mm and a C content of ≥98%, 3 kilograms Carbon black with fineness≤0.01mm and C content≥98.5%, 1kg B 4 C≥92% boron carbide fine powder, then add metal Si and Al composite powder mixed in advance, and mix in a double-cone mixer to form a mixed powder;

[0059] 2) Take 15 kilograms of 3-2 mm tabular alumina particles, 18 kg of 2-1 mm tabular alumina particles, 13 kg of 1-0.5 mm tabular alumina particles, and 14 kg of 0.5 mm or less tabular corundum particles, and stir a...

Embodiment 3

[0063] 1) 6 kg of metal Si powder with a fineness of ≤0.038mm and a Si content of ≥98%, and 1 kg of metal Al powder with a fineness of ≤0.088mm and an Al content of ≥98%, were stirred and mixed in advance to form metal Si and Al composite powder , and then select 18 kg of tabular corundum fine powder with a specification of less than or equal to 50 microns, 5 kg of activated alumina fine powder with a specification of less than or equal to 28 microns, 1 kg of graphite with a fineness of ≤0.038mm and a C content of ≥98%, 1 kg Carbon black with fineness ≤ 0.01mm and C content ≥ 98.5%, 2 kg of β-SiAlON fine powder with fineness ≤ 0.044 mm, 1 kg of B 4 C≥92% boron carbide fine powder, then add metal Si and Al composite powder mixed in advance, and mix in a double-cone mixer to form a mixed powder;

[0064] 2) Take 15 kg of 3-2mm tabular alumina particles, 20 kg of 2-1mm tabular alumina particles, 17 kg of 1-0.5mm tabular corundum particles, and 13 kg of tabular corundum particles ...

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Abstract

The invention discloses a low-carbon Al2O3-C sliding material compounded by metal Si / Al. The preparation method includes the following steps of: mixing, ageing, press-forming and drying fine powder and tabular corundum grains to form the material through burning at the temperature of 550-650 DEG C, wherein the fine powder includes: Si powder, Al powder, activated alumina micro-powder, carbon powder, B4C powder and tabular corundum power. The weight percentages of all the raw materials are as follows: Si powder 5-10; Al powder 1-4; activated alumina micro-powder 3-5; carbon powder 2-6; B4C powder 1 plus or minus 0.5, tabular corundum power 13.5-22.5 and tabular corundum grains the balance; or the fine powder also includes 2 plus or minus 0.5 of Beta-SiAlON powder. The material is characterized by low content of carbon and is especially suitable for casting low carbon steel. With 550-650 DEG C burning process adopted, the energy source can be save effectively, the high temperature mechanical property of sliding plate bricks is improved, higher resistance to thermal shock is retained and the service life is long. The invention better agrees with the change of steel types, inhibits the corrosion, washing and permeability of molten steel and better agrees with the development of continuous casting of steel toward the direction of long service life and high efficiency.

Description

Technical field: [0001] The invention relates to a sliding plate for continuous casting required for liquid steel flow control, in particular to a metal Si / Al composite low-carbon Al for continuous casting suitable for the flow control requirements of different types of liquid steel 2 o 3 -C skateboard material and preparation method thereof. Background technique: [0002] With the continuous promotion and application of new steelmaking and continuous casting technologies in recent years, coupled with the development of high-oxygen steel, calcium-treated steel, ultra-pure steel and other types of steel, the working environment of the skateboard is also facing more severe molten steel erosion, Chemical erosion and greater temperature fluctuations require the slide to be more reliable, long-lived and efficient. Under strong thermal shock and thermochemical erosion, due to differences in casting methods, time, temperature, steel types, throttling and turnaround time, etc. Due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/16B22F1/02B22D41/32
Inventor 钟香崇刘新红罗焰卫忠贤葛铁柱王大军吕培中叶方保
Owner ZHENGZHOU UNIV
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