A kind of preparation method of 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 the effects of high hardness and wear resistance, wide composition range, high strength and wear resistance

Active Publication Date: 2017-06-27
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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  • A kind of preparation method of ceramic/iron-based amorphous composite coating
  • A kind of preparation method of ceramic/iron-based amorphous composite coating
  • A kind of preparation method of ceramic/iron-based amorphous composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0027] 1. Before spraying, clean the surface of the alloy workpiece such as derusting, descaling, degreasing, etc., and dry it for later use;

[0028] 2. Carry out sandblasting and roughening activation treatment on the pretreated alloy workpiece; the purpose is to remove impurities such as oil stains on the surface of the substrate, improve the roughness of the substrate, and facilitate the good mechanical engagement of the coating and the substrate, increasing the coating and the substrate. 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, plasma spraying i...

Embodiment 2－3

[0035] Example 2-3: 45# steel as the substrate, Fe-based amorphous and ZrO in the composite coating 2 The mass ratio of ceramics is changed from 4:1 to 2:1 and 1:1 respectively; other steps are 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 affecting the formation ability of the amorphous phase due to the addition of the ceramic crystal phase, but also realize the controllable composition ratio. The ratio of the two phases in the composite coating can be 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 rate of Fe-based amorphous powder is 74L / min, 37L / min and 18L / min respectively, and the spray gun distance is 86mm, respectively. 92mm and 100mm.

[0037] Fe-based amorphous and ZrO 2 The XRD diffraction p...

Embodiment 4

[0039] Embodiment 4: Substrate is with 45# steel, Fe-based amorphous and Al in composite coating 2 o 3 The mass ratio of ceramics is 4:1 as an example. Other steps are with embodiment 1, and difference is that 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, and the powder feeding distance is 12mm from the nozzle of the gun. The plasma spraying technology: the spraying power is 32kW, the current is 500A, the voltage is 64V, the spraying distance between the spray gun and the workpiece is 90mm, the moving speed of the spray gun is 6-8m / min, H 2 The gas flow rate is 120L / min, and the powder feeding gas for amorphous powder and ceramic powder is Ar gas, Al 2 o 3 The powder feeding air flow rate of ceramic powder is 20L / min. The density of the Fe-based amorphous phase is 7.0 g / cm 3 , Al 2 o 3 The density of the ceramic phase is 4.2g / cm 3 ,...

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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 and a preparation method for the surface coating of metal materials, which belong to the technical field of surface coating of metal materials, and more specifically design a method for preparing a high wear-resistant ceramic / iron-based amorphous composite coating . Background technique [0002] Compared with conventional polycrystalline metal materials, amorphous alloys (also known as metallic glasses) exhibit structural characteristics of long-range disorder and short-range order, and have many excellent mechanical and physical properties, such as: high strength, corrosion resistance, wear resistance properties, good magnetic properties, etc., have huge potential application prospects. Due to its low price, Fe-based amorphous has become one of the important topics of research and attention in the field of science at home and abroad. However, due to size limitations, the products of amorphous alloys are mainly thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/08C23C4/06C23C4/134C23C4/073
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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