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Penetration brazing preparation method of high-content wolfram carbide gradient wear-resisting coating

A wear-resistant coating and tungsten carbide technology, which is applied in the field of high-content tungsten carbide gradient wear-resistant coatings, can solve the problems of difficult to achieve tungsten carbide coating protection, wear resistance, poor corrosion resistance, and easy peeling of coatings, etc., to achieve Small stress, firm bond and high density

Inactive Publication Date: 2014-08-13
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] 2. The open patent only adopts single-layer technology. Due to the stress shrinkage during brazing, the coating is easy to fall off
It can only be applied to flat parts. For curved parts, this technology is difficult to achieve tungsten carbide coating protection, and it is difficult to fit at all.
[0019] 3. The binder phase used in the published patent is simple nickel powder and chromium powder, and its wear resistance and corrosion resistance are significantly worse than those of this patent

Method used

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  • Penetration brazing preparation method of high-content wolfram carbide gradient wear-resisting coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The method for the tungsten carbide wear-resistant composite coating prepared by the infiltration brazing method described in the present embodiment: comprises the following steps:

[0054] (1), will contain different contents of tungsten carbide (WC), nickel-chromium alloy powder (Ni 30 Cr 6 ) two-layer coated metal powder wire mesh flexible composite cloth is pasted on the metal substrate with an epoxy resin adhesive, and the order of pasting is that the one with high tungsten carbide (WC) content is close to the surface, and the one with low content is close to the substrate;

[0055] (2) Prepare the BNi-2 brazing material into a solder wire mesh flexible composite cloth and paste it on the coated metal powder flexible wire mesh cloth in step (1);

[0056] (3) Infiltration brazing is carried out in a vacuum furnace. During brazing, the first stage of heating removes the forming agent and binder in the flexible wire mesh cloth containing wear-resistant tungsten carbi...

Embodiment 2

[0066] The method for the tungsten carbide wear-resistant composite coating prepared by the infiltration brazing method described in the present embodiment: comprises the following steps:

[0067] (1), will contain different contents of tungsten carbide (WC), nickel-chromium alloy powder (Ni 30 Cr 6 ) two-layer coated metal powder flexible wire mesh cloth is pasted on the metal substrate with epoxy resin adhesive, and the order of pasting is that the one with high tungsten carbide (WC) content is close to the surface, and the one with low content is close to the substrate;

[0068] (2) Prepare the BNi-2 brazing material into a solder wire mesh flexible composite cloth and paste it on the coated metal powder flexible wire mesh cloth in step (1);

[0069] (3) Infiltration brazing is carried out in a vacuum furnace. During brazing, the first stage of heating removes the forming agent and binder in the flexible wire mesh cloth containing wear-resistant tungsten carbide particles,...

Embodiment 3

[0079] The method for the tungsten carbide wear-resistant composite coating prepared by the infiltration brazing method described in the present embodiment: comprises the following steps:

[0080] (1), will contain different contents of tungsten carbide (WC), nickel-chromium alloy powder (Ni 30 Cr 6 ) two-layer coated metal powder flexible wire mesh cloth is pasted on the metal substrate with epoxy resin adhesive, and the order of pasting is that the one with high tungsten carbide (WC) content is close to the surface, and the one with low content is close to the substrate;

[0081] (2) Prepare the BNi-2 brazing material into a solder wire mesh flexible composite cloth and paste it on the coated metal powder flexible wire mesh cloth in step (1);

[0082] (3) Infiltration brazing is carried out in a vacuum furnace. During brazing, the first stage of heating removes the forming agent and binder in the flexible wire mesh cloth containing wear-resistant tungsten carbide particles,...

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Abstract

The invention provides a penetration brazing preparation method of a high-content wolfram carbide gradient wear-resisting coating, comprising the following steps: sequentially sticking a plurality of layers metal wire net flexible compound cloth containing wolfram carbide WC or wolfram carbide-cobalt WC-Co and nickel-chromium alloy powder Ni-Cr on a metal base body by using an epoxy resin binding agent; and carrying out penetration brazing in a vacuum furnace. Compared with the prior art, the Rockwell hardness of a researched coating with the WC content of 70% is HRC64-70 and the wear resistance is obviously improved.

Description

technical field [0001] The invention relates to a method for a high-content tungsten carbide gradient wear-resistant coating prepared by an infiltration brazing method, and belongs to the field of coating preparation in material processing engineering. Background technique [0002] Friction, wear and corrosion are the main forms of failure of metal workpieces in various mechanical equipment, and the resulting economic losses caused by increased energy and material consumption are huge. Therefore, research on metal wear and wear-resistant and corrosion-resistant materials has always been Wide attention at home and abroad. [0003] After entering the 21st century, with the rapid growth of my country's economy, the components of mechanical equipment in many industries have higher requirements for wear resistance, corrosion resistance or high temperature resistance. Such as oil drilling drill pipe, plastic processing molding extrusion parts, food processing molding extrusion pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
Inventor 晏建武张晨曙
Owner NANCHANG INST OF TECH
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