Titanium alloy surface high-magnetic-conductivity wear-resistant coating material for magnetic fluid sealing, preparation method thereof and application thereof

A magnetic fluid seal and wear-resistant coating technology, which is applied in the direction of metal material coating process, coating, engine sealing, etc., can solve the problems of large specific gravity and poor wear resistance, and achieve the purpose of improving hardness, enhancing wear resistance, The effect of reducing the tendency of cracking

Active Publication Date: 2020-08-28
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adopt laser cladding technology and apply the coating material on the titanium alloy parts of the magnetic fluid sealing system, which solves the shortcomings of large specific gravity and poor wear resistance when traditional parts are used in this part, and realizes light weight and wear resistance of the part requirements

Method used

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  • Titanium alloy surface high-magnetic-conductivity wear-resistant coating material for magnetic fluid sealing, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high magnetic permeability and wear-resistant coating on the surface of a titanium alloy is prepared by using a mixture of FeCoV-based alloys, WC, Si, and B as cladding materials and using laser cladding technology. The specific steps are as follows:

[0034] (1) According to the following specific composition (mass fraction%): transition layer: FeCoV alloy 95%, Si powder 3%, B powder 2%; main body layer: FeCoV alloy powder 92%, WC powder 3%, Si powder 3%, B powder 2%; wear-resistant layer: FeCoV alloy 80%, WC powder 15%, Si powder 2%, B powder 3%; ball milling process parameters are as follows: mass ratio of ball to material is 10:1; speed: 225n / (r·min -1 ); the ball milling time is 1h, and the cladding layer powder is obtained; the particle size of the cladding layer powder is 200 mesh, and the fluidity is 16s / 50g.

[0035](2) Dry the cladding layer powder with a dryer and set it aside.

[0036] (3) Cut the titanium alloy wire into 200mm×100mm×5mm, ultrasonically...

Embodiment 2

[0040] A high magnetic permeability and wear-resistant coating on the surface of a titanium alloy is prepared by using a mixture of FeCoV-based alloys, WC, Si, and B as cladding materials and using laser cladding technology. The specific steps are as follows:

[0041] (1) According to the specific composition as follows (wt.%): transition layer: FeCoV alloy 93%, Si powder 4%, B powder 3%, main layer: FeCoV alloy 91%, WC4%, Si3%, B2%; wear-resistant Layer: 78% of FeCoV alloy, 20% of WC powder, 1% of Si powder, and 1% of B powder. The cladding layer powder is obtained by ball milling method. The ball milling process parameters are: ball-to-material ratio 10:1; min -1 ); the ball milling time is 1h, and the cladding material powder is obtained, the particle size of the cladding material powder is 200 mesh, and the fluidity is 16s / 50g.

[0042] (2) Dry the cladding material powder with a dryer and set it aside.

[0043] (3) Cut the titanium alloy wire into 200mm×100mm×5mm, ultra...

Embodiment 3

[0047] A high magnetic permeability and wear-resistant coating on the surface of a titanium alloy is prepared by using a mixture of FeCoV-based alloys, WC, Si, and B as cladding materials and using laser cladding technology. The specific steps are as follows:

[0048] (1) According to the following specific composition (mass fraction%): transition layer: FeCoV alloy 95%, Si powder 3%, B powder 2%; main body layer: FeCoV alloy powder 92%, WC powder 3%, Si powder 3%, B powder 2%; wear-resistant layer: FeCoV alloy 80%, WC powder 15%, Si powder 2%, B powder 3%; ball milling process parameters are as follows: mass ratio of ball to material is 10:1; speed: 225n / (r·min-1); the ball milling time is 1h, and the cladding layer powder is obtained; the particle size of the cladding layer powder is 200 mesh, and the fluidity is 16s / 50g.

[0049] (2) Dry the cladding layer powder with a dryer and set it aside.

[0050] (3) Cut the titanium alloy wire into 200mm×100mm×5mm, ultrasonically c...

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Abstract

The invention belongs to the technical field of surface protection and magnetic conductive coatings, and discloses a titanium alloy surface high-magnetic-conductivity wear-resistant coating material for magnetic fluid sealing, a preparation method of the titanium alloy surface high-magnetic-conductivity wear-resistant coating material and application of the titanium alloy surface high-magnetic-conductivity wear-resistant coating material. The titanium alloy surface high-magnetic-conductivity wear-resistant coating material sequentially comprises a wear-resistant layer, a body layer and a transition layer. The transition layer is located between a substrate and the body layer. The transition layer comprises 85%-97% of iron-cobalt-vanadium alloy, 1%-5% of Si and 1%-5% of B. The body layer comprises 85-95% of iron-cobalt-vanadium alloy, 2%-5% of Si, 2%-5% of B and 1%-5% of WC. The wear-resistant layer comprises 70%-80% of iron-cobalt-vanadium alloy, 1%-5% of Si, 1%-5% of B and 10%-20% ofWC. The coating material integrates multiple functions of the high hardness, the high wear resistance and the high magnetic conductivity. A laser cladding method is adopted to manufacture the coatingmaterial, and the coating material can serve as a titanium alloy part of a magnetic fluid sealing system to be applied to the field of aerospace.

Description

technical field [0001] The invention belongs to the technical field of surface protection and magnetically conductive coating, and more specifically relates to a titanium alloy surface high magnetically conductive and wear-resistant coating material used for magnetic fluid sealing, its preparation method and application. Background technique [0002] Magnetic fluid sealing is an advanced dynamic sealing technology, which means that under the action of a certain carrier liquid, the fluid containing nano-magnetic particles is placed in the structure of the external magnetic field. Under the action of the magnetic circuit, the magnetic fluid is concentrated in the sealing gap Inside, so as to achieve the role of sealing. It has the advantages of zero leakage, high rotational speed, and high torque transmission efficiency; as a sealing component in complex environments such as aerospace and navigation, more and more attention has been paid to it, and it has broad application pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00B22F9/04F16J15/43
CPCC23C24/103C23C24/106B22F9/04F16J15/43B22F2009/043B22F1/05
Inventor 李海庆王浩王启民李海新
Owner GUANGDONG UNIV OF TECH
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