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Method for preparing ceramic/iron-based amorphous composite coating

An iron-based amorphous and composite coating technology, which is applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of uncontrollable ratio of amorphous and ceramic in the coating, large performance fluctuations, etc. Achieve high hardness and wear resistance, wide composition range, and improve toughness

Active Publication Date: 2015-12-30
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The common problem of these preparation methods is that the proportion of amorphous and ceramic phases in the coating is uncontrollable, and the performance fluctuates greatly.

Method used

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  • Method for preparing ceramic/iron-based amorphous composite coating
  • Method for preparing ceramic/iron-based amorphous composite coating
  • Method for preparing ceramic/iron-based amorphous composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: The substrate is made of 45# steel, Fe-based amorphous and ZrO in the composite coating 2 The mass ratio of ceramics is 4:1 as an example.

[0026] The embodiments of the present invention adopt the following technical conditions:

[0027] 1. Before spraying, clean the surface of the alloy workpiece such as rust, scale, and oil, and dry it for later use;

[0028] 2. The pretreated alloy workpiece is subjected to sandblasting coarsening activation treatment; the purpose is to remove impurities such as oil stains on the surface of the substrate, improve the roughness of the substrate, and help the coating and the substrate produce good mechanical occlusion, and increase the coating and The bonding area between the substrates, so as to achieve the purpose of improving the bonding strength between the coating and the substrate;

[0029] 3. In order to increase the bonding strength between the coating and the substrate, the alloy workpiece that has been sandblasted and co...

Embodiment 2－3

[0035] Example 2-3: The substrate is made of 45# steel, Fe-based amorphous and ZrO in the composite coating 2 The mass ratio of the ceramic was changed from 4:1 to 2:1 and 1:1 respectively; the other steps were the same as in Example 1.

[0036] The composite coating prepared by the plasma double powder feeding technology in the present invention can not only control the amorphous phase structure to avoid the influence of the addition of the ceramic crystal phase on the amorphous forming ability, but also realize the controllable composition ratio. The ratio of the two phases in the composite coating is changed by adjusting the flow rate of the powder feeding gas. Fe-based amorphous and ZrO 2 When the mass ratio of ceramics is 4:1, 2:1 and 1:1, the powder feeding air flow of Fe-based amorphous powder is 74L / min, 37L / min and 18L / min, respectively, and the spray gun distance is 86mm, 92mm and 100mm.

[0037] Fe-based amorphous and ZrO 2 The XRD diffraction spectra of composite coati...

Embodiment 4

[0039] Example 4: The substrate is made of 45# steel, Fe-based amorphous and Al in the composite coating 2 O 3 The mass ratio of ceramics is 4:1 as an example. The other steps are the same as in Example 1, except that the ceramic powder is made of ZrO 2 Change to Al 2 O 3 . Spraying process Al 2 O 3 The ceramic powder is fed inside the gun, and the Fe-based amorphous powder is fed outside the gun. The powder feeding distance is 12mm from the nozzle. Said plasma spraying technology: spraying power is 32Kw, current is 500A, voltage is 64V, spraying distance between spray gun and workpiece is 90mm, spray gun moving speed is 6-8m / min, H 2 The gas flow rate is 120L / min, the powder feeding gas for amorphous powder and ceramic powder is Ar gas, Al 2 O 3 The gas flow rate of ceramic powder is 20L / min. The density of Fe-based amorphous phase is 7.0g / cm 3 , Al 2 O 3 The density of the ceramic phase is 4.2g / cm 3 , The powder feeding gas flow rate of Fe-based amorphous powder is 48L / min. ...

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Abstract

The invention discloses a method for preparing a ceramic / iron-based amorphous composite coating. The method includes the following steps that 1, cleaning pretreatment is carried out on the surface of an alloy workpiece before spraying is carried out; 2, abrasive blasting coarsening activating treatment is carried out; 3, spraying is carried out on the surface of the alloy workpiece with a plasma spraying technology, and a binding bottom layer with the thickness ranging from 80 micrometers to 100 micrometers is obtained; 4, spraying is carried out on the surface of an alloy workpiece base body obtained in the step 3 with a multi-path and different-position plasma spraying powder feeding technology, wherein the powder feeding gas flow for ceramic powder ranges from 18 L / min to 23 L / min, and the powder feeding gas flow for iron-based amorphous powder ranges from 10 L / min to 200 L / min; finally the ceramic / iron-based amorphous composite coating is obtained. According to the method, as the plasma multi-path and different-position powder feeding technology is adopted, amorphous materials and ceramic can be co-deposited on the base body, and the proportion of ingredients of the composite coating can be adjustable and controllable. The obtained ceramic-amorphous composite coating has higher rigidity and higher abrasion resistance compared with a single amorphous coating.

Description

Technical field [0001] The invention relates to a material for surface coating of metal materials and a preparation method, belonging to the technical field of surface coating of metal materials, and more specifically to a method for preparing high wear-resistant ceramic / iron-based amorphous composite coatings . Background technique [0002] Compared with conventional polycrystalline metal materials, amorphous alloys (also known as metallic glass) present long-range disorder and short-range order structural characteristics, and have many excellent mechanical and physical properties, such as: high strength, corrosion resistance, and wear resistance It has great potential application prospects, such as sex, good magnetic properties, etc. Fe-based amorphous has become one of the important topics of research and attention in scientific fields at home and abroad due to its low price. However, due to size limitations, amorphous alloy products are mainly thin ribbons, filaments, powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/06C23C4/12
CPCC23C4/06C23C4/08
Inventor 褚振华阎殿然张建新董艳春杨勇陈学广黄丹
Owner HEBEI UNIV OF TECH
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