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Wear-resistant coating composition, wear-resistant welding wire and preparation method and application thereof

A technology of composition and coating, which is applied in the field of wear-resistant materials, can solve the problems of affecting the wear resistance of the surfacing layer metal, reducing the strength of diamond, and difficult wetting of diamond, so as to improve the atmosphere protection effect, reduce the linear expansion coefficient, Effect of improving brazing efficiency

Active Publication Date: 2020-04-07
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the brazing process, the base metal generally needs to be uniformly heated as a whole. The heating methods include furnace heating, induction heating, and flame heating. The brazing efficiency is low, and special equipment is required, which is difficult to meet the requirements of equipment remanufacturing in service.
In addition, during the welding process, diamonds are easily oxidized and graphitized at high temperatures, causing thermal damage to the diamonds, which will seriously affect the wear resistance of the surfacing layer metal; most welding materials are difficult to wet or cannot Wetting, forming a mechanical wrapping structure, poor wear resistance; the linear expansion coefficient of diamond is lower than most metal materials, it is very easy to produce cracks under the action of welding thermal stress, reducing the strength of diamond

Method used

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  • Wear-resistant coating composition, wear-resistant welding wire and preparation method and application thereof
  • Wear-resistant coating composition, wear-resistant welding wire and preparation method and application thereof
  • Wear-resistant coating composition, wear-resistant welding wire and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0069] Surface activation of experimental example 1 diamond particles

[0070] (1) The diamond particles are placed in a sodium hydroxide solution with a concentration of 8g / L and 80°C, treated with ultrasonic vibration (40kHz, 30min), washed with deionized water until pH=7, and dried at 70°C;

[0071] (2) Place the dried diamond particles in a nitric acid solution (30wt.%), boil for 10 minutes, wash with deionized water until pH=7, and dry at 70°C;

[0072] (3) Soak the dried diamond particles in a mixed solution of ammonium molybdate (40g / L) and ammonium niobium oxalate (50g / L) at 60°C for 40min, remove, dry at 70°C, and set aside.

Embodiment 1

[0073] The preparation of embodiment 1 wear-resistant welding wire

[0074] 1 # Wear-resistant wire

[0075] The components of the wear-resistant coating composition are as shown in table 1:

[0076] Components and content of the wear-resistant coating composition of table 1

[0077] components surface activated diamond particles niobium oxide Molybdenum oxide Polymethylmethacrylate Nickel base alloy powder content 2wt.% 5wt.% 5wt.% 8wt.% BN 74 CrFeSiB balance

[0078] The welding core is pure nickel welding core with a diameter of Ф2.0mm and a length of 400mm.

[0079] The mixing of each material of the wear-resistant coating composition:

[0080] (1) Put niobium oxide, molybdenum oxide, polymethyl methacrylate, dimethyl carbonate and nickel-based alloy powder into a ball mill and mix them evenly according to the proportioning ratio;

[0081] The ball mill pot is made of ceramic material, the grinding ball is a high chromium c...

experiment example 2

[0125] Experimental Example 2 Brazing application of wear-resistant welding wire

[0126] With the 1 prepared in embodiment 1 # ~5 # Wear-resistant welding wire is typical, and it is surfacing welding on the surface of 10mm thick Q235 steel plate. The surfacing welding conditions are as follows:

[0127] The welding polarity is DC reverse connection, the welding current is 300A~480A, the welding voltage is 23V~35V, and the welding overlap is 50%;

[0128] The protective atmosphere for surfacing welding is argon with a dew point of -55°C.

[0129] As a control, comparative example D1 # ~D5 # Respectively with the same as in Example 1 1 # ~5 # Amount of wear-resistant welding wire and treatment method Diamond powder and nickel-based alloy powder are directly brazed in an argon shielded furnace to coat a 10mm thick Q235 steel plate with a coating thickness of 0.5mm.

[0130] With the 1 prepared in embodiment 1 # ~5 # The wear-resistant welding wire is used for the sample...

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Abstract

The invention relates to a wear-resistant coating composition, a wear-resistant welding wire and a preparation method and application thereof. The wear-resistant coating composition comprises a wear-resistant material, a polymer material and a filling material, wherein the wear-resistant material accounts for 0.5wt.%-5.5wt.% of the wear-resistant coating composition, and the wear-resistant material comprises diamond particles; the polymer material accounts for 5wt.-20wt.% of the wear-resistant coating composition; and the filling material comprises transition metal oxide powders and nickel-based alloy powders, wherein the transition metal oxide accounts for 10wt.%-40wt.% of the filling material. According to the wear-resistant coating composition, the diamond is used as a wear-resistant reinforcing material, the transition metal oxide is used as the filling material; when the wear-resistant coating composition is used for welding or brazing coating, the diamond forms a wear-resistant coating; and due to the existence of the filling material, the thermal damage of the diamond is reduced, the brazing activity is improved, and meanwhile, the linear expansion coefficient of cladding metal is reduced.

Description

technical field [0001] The invention relates to the field of wear-resistant materials, in particular to a wear-resistant coating composition, a wear-resistant welding wire and a preparation method and application thereof. Background technique [0002] The overall life of a product is determined by the life of its key parts, that is, when the product reaches the end of its life, not all parts have reached their service life, mainly due to the wear and tear of a few key parts and other failures. Deterioration, thereby shortening the service life of the product, or failing to serve due to the lack of key performance indicators. Remanufacturing can realize high-level resource utilization of waste mechanical and electrical products, and is an effective way to achieve energy saving and emission reduction, and has a significant role in resource conservation and environmental protection. [0003] As a remanufacturing technology, brazing technology uses the principle of brazing to u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/12B23K35/40
CPCB23K35/0261B23K35/365B23K35/40C08K3/04C08K3/22C08K2003/0862C09D5/00C09D7/61
Inventor 钟素娟董博文秦建宋克兴丁天然孙华为吕登峰李胜男
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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