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Iron based amorphous/alumina ceramic composite powder and preparation method and applications thereof

A kind of technology of alumina ceramics and iron-based amorphous, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problems of poor wear resistance and high preparation cost, and achieve excellent wear resistance and improve Glass-forming ability and toughness improvement effect

Active Publication Date: 2018-09-18
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem to be solved: This application mainly proposes an iron-based amorphous / alumina ceramic composite powder and its preparation method and application, so as to solve the technical problems of poor wear resistance and high preparation cost in the prior art

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  • Iron based amorphous/alumina ceramic composite powder and preparation method and applications thereof

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Embodiment 1

[0032] An iron-based amorphous / alumina ceramic composite powder, the preparation method comprising the following steps:

[0033] Step 1: Weigh 75.8 parts of low-carbon ferrochrome, 8.5 parts of high-carbon ferrochrome, 3.7 parts of cobalt, 5.1 parts of electrolytic nickel, 19.2 parts of ferro-niobium, 9.9 parts of ferrosilicon, 40.7 parts of ferro-molybdenum, 9.2 parts of boron iron, 7.6 parts of boron carbide, 10.8 parts of iron, 6.8 parts of nano-sized alumina particles;

[0034] Step 2: Add low-carbon ferrochrome, high-carbon ferrochrome, cobalt, electrolytic nickel, ferro-niobium, ferrosilicon, ferro-molybdenum, ferro-boron, boron carbide and iron into the induction induction cooker, heat to 2250 ℃ to melt all the materials, and induce The heating rate of the induction cooker is 60-80°C / min;

[0035] Step 3: Cool the completely melted molten metal at a cooling rate of 400-600°C / h, add half of the nano-sized alumina particles when the temperature of the molten metal drops ...

Embodiment 2

[0046] An iron-based amorphous / alumina ceramic composite powder, the preparation method comprising the following steps:

[0047] Step 1: Weigh 75.8 parts of low-carbon ferrochrome, 8.5 parts of high-carbon ferrochrome, 3.7 parts of cobalt, 5.1 parts of electrolytic nickel, 19.2 parts of ferro-niobium, 9.9 parts of ferrosilicon, 40.7 parts of ferro-molybdenum, 9.2 parts of boron iron, 7.6 parts of boron carbide, 10.8 parts of iron, 6.1 parts of nano-sized alumina particles;

[0048] Step 2: Add low-carbon ferrochrome, high-carbon ferrochrome, cobalt, electrolytic nickel, ferro-niobium, ferrosilicon, ferro-molybdenum, ferro-boron, boron carbide and iron into the induction induction cooker, heat to 2250 ℃ to melt all the materials, and induce The heating rate of the induction cooker is 60-80°C / min;

[0049] Step 3: Cool the completely melted molten metal at a cooling rate of 400-600°C / h, add half of the nano-sized alumina particles when the temperature of the molten metal drops ...

Embodiment 3

[0058] An iron-based amorphous / alumina ceramic composite powder, the preparation method comprising the following steps:

[0059] Step 1: Weigh 75.8 parts of low-carbon ferrochrome, 8.5 parts of high-carbon ferrochrome, 3.7 parts of cobalt, 5.1 parts of electrolytic nickel, 19.2 parts of ferro-niobium, 9.9 parts of ferrosilicon, 40.7 parts of ferro-molybdenum, 9.2 parts of boron iron, 7.6 parts of boron carbide, 10.8 parts of iron, 8.1 parts of nano-sized alumina particles;

[0060] Step 2: Add low-carbon ferrochrome, high-carbon ferrochrome, cobalt, electrolytic nickel, ferro-niobium, ferrosilicon, ferro-molybdenum, ferro-boron, boron carbide and iron into the induction induction cooker, heat to 2250 ℃ to melt all the materials, and induce The heating rate of the induction cooker is 60-80°C / min;

[0061] Step 3: Cool the completely melted molten metal at a cooling rate of 400-600°C / h, add half of the nano-sized alumina particles when the temperature of the molten metal drops ...

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Abstract

The invention discloses an iron based amorphous / alumina ceramic composite powder and a preparation method and applications thereof. The composite powder comprises following components in percentage byweight: 23.2 to 25.2 wt% of Cr, 3.3 to 4.5 wt% of B, 3.1 to 3.8 wt% of Si, 3.2 to 5.6 wt% of Nb, 1.8 to 2.8 wt% of Ni, 10.3 to 12.3 wt% of Mo, 1.5 to 2.0 wt% of Co, 3.2 to 4.2 wt% of Al2O3, and the balance being Fe. The raw materials are added into an induction cooker and then are heated and melted; the melted metals are atomized and dried, then the powder is sieved; the powder is used to preparea wear-resistant iron based amorphous / alumina ceramic composite protective coating, the coating is prepared by an ultrasonic flame spraying technology, and the obtained coating has the advantages ofhigh hardness, good binding strength, and excellent wear-resistant performance and can be used under severe work conditions such as a high parameter valve sealing surface.

Description

technical field [0001] The invention belongs to the thermal spraying field of material processing engineering, and specifically relates to an iron-based amorphous / alumina ceramic composite powder and a preparation method and application thereof. Background technique [0002] High-parameter valve sealing surfaces, refiner discs and other components are often severely worn and damaged during actual work, causing the surface of the components to deform or even lose part of the material, resulting in the formation of surfaces with wear marks and pits, resulting in the work efficiency of the components reduced, shortened service life. So far, the method of repairing components or improving the wear resistance of components through surface technology has received extensive attention. [0003] Amorphous materials exhibit a series of excellent mechanical properties, physical properties, and chemical properties due to their completely uniform composition, such as high magnetic per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C22C38/48C22C38/44C22C38/52C22C38/02B22F9/08C23C4/06C23C4/129
CPCB22F9/082B22F2009/0828B22F2009/0848C22C38/34C22C38/44C22C38/48C22C38/52C22C38/54C23C4/06C23C4/129
Inventor 洪晟乔磊吴玉萍
Owner HOHAI UNIV
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