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Method for preparing tungsten carbide abrasion resistant composite coating by penetration brazing method

A composite coating, tungsten carbide technology, used in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of low bonding strength and thin metal protective coating thickness, restore mechanical properties, reduce the number of shutdowns for maintenance, temperature uniformity

Active Publication Date: 2010-02-03
JIANGXI HENGDA HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method for the tungsten carbide anti-corrosion composite coating prepared by the infiltration brazing method required for the coating protection urgently needed for high-temperature heavy erosion and abrasive parts, so as to solve the problem of general metal protection. The problem of thin coating thickness and low bonding strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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:

[0026] (1) Paste the coated metal powder cloth containing tungsten carbide-cobalt (WC-Co), nickel (Ni), chromium (Cr) mixed powder on the metal substrate with epoxy resin adhesive;

[0027] (2), BNi-2 brazing material is prepared into solder metal powder cloth and pasted on the coated metal powder cloth of step (1);

[0028] (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 metal cloth, and the second stage of heating melts the solder and penetrates into the coated cloth to remove the tungsten carbide Joining together to form a coating, the solder simultaneously diffuses into the base metal to join the coating and base metal together, forming a metallurgically bonded interface.

[0029] In the...

Embodiment 2

[0039] 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:

[0040] (1) Paste the coated metal powder cloth containing tungsten carbide-cobalt (WC-Co), nickel (Ni), chromium (Cr) mixed powder on the metal substrate with epoxy resin adhesive;

[0041] (2), BNi-2 brazing material is prepared into solder metal powder cloth and pasted on the coated metal powder cloth of step (1);

[0042] (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 metal cloth, and the second stage of heating melts the solder and penetrates into the coated cloth to remove the tungsten carbide Joining together to form a coating, the solder simultaneously diffuses into the base metal to join the coating and base metal together, forming a metallurgically bonded interface.

[0043]In the ...

Embodiment 3

[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) Paste the coated metal powder cloth containing tungsten carbide-cobalt (WC-Co), nickel (Ni), chromium (Cr) mixed powder on the metal substrate with epoxy resin adhesive;

[0055] (2), BNi-2 brazing material is prepared into solder metal powder cloth and pasted on the coated metal powder cloth of 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 metal cloth, and the second stage of heating melts the solder and penetrates into the coated cloth to remove the tungsten carbide Joining together to form a coating, the solder simultaneously diffuses into the base metal to join the coating and base metal together, forming a metallurgically bonded interface.

[0057] In the...

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Abstract

The invention relates to a method for preparing tungsten carbide abrasion resistant composite coating by a penetration brazing method, belonging to the field of coating preparation in materials processing engineering. The invention comprises the following steps: (1) pasting coating metal powder cloth containing tungsten carbide-cobalt (WC-Co), nickle (Ni) and chromium (Cr) mixed powder on a metalsubstrate by using epoxy resin bonding agent; (2) preparing welding material metal powder cloth from BNi-2 brazing material and pasting the welding material metal powder cloth on the coating metal powder cloth obtained in the step (1); and (3) carrying out penetration brazing in a vacuum furnace to form a metallurgical bonded interface. The tungsten carbide abrasion resistant composite coating canbe applicable to protection of mechanical elements in the field of generating plant, petroleum, aviation, food, plastics and the like.

Description

technical field [0001] The invention relates to a method for preparing a tungsten carbide anti-corrosion composite coating 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] Many components of mechanical equipment have requirements for anti-wear, anti-corrosion or high temperature resistance. In a sense, the reliability of mechanical equipment depends on the degree of anti-corrosion and anti-wear of its key components. Solving the problems of anti-corrosion and anti-wear How it works plays a decisive role in the safety, reliabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K103/08B23P6/00
Inventor 请求不公开姓名
Owner JIANGXI HENGDA HI TECH CO LTD
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