Composite braze coating material and preparation method thereof

A technology of brazing coating and brazing material, which is applied in the direction of welding/cutting media/materials, manufacturing tools, welding equipment, etc., can solve the problems of high oxygen content of powdered solder, low work efficiency, waste of brazing flux, etc., and achieve cleanliness High, good formability, strong bonding effect

Inactive Publication Date: 2017-01-04
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional brazing materials are usually prepared by preparing powdery brazing material, cemented carbide particles, adhesives, organic matter, etc. into suspended slurry-like brazing materials or sheet-like brazing materials, and then coated or adhered to the surface of the workpiece. In order to prevent the oxidation of the base metal and powdered solder and promote the wetting and spreading of the solder on the surface of

Method used

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  • Composite braze coating material and preparation method thereof

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preparation example Construction

[0025] The preparation method of composite brazing coating material of the present invention is as follows:

[0026] The solder alloy is prepared into a strip or plate of the required size through smelting, extrusion, rolling and other processes, and the cemented carbide particles are sprayed on the upper surface of the solder alloy strip or plate by cold spraying equipment, and then the The corresponding general-purpose flux is sprayed onto the lower surface of the brazing alloy strip or plate by thermal spraying equipment to form a composite brazing coating of a certain size consisting of cemented carbide coating 1, brazing alloy layer 2 and flux coating 3 Material.

Embodiment 1

[0029] The solder alloy is prepared into a BCu solder strip with a thickness of 0.2mm through smelting, extrusion, rolling and other processes. The cemented carbide is made of cast tungsten carbide powder and Co powder with 20-30 mesh as raw materials. The powder block WC12Co is obtained by vacuum sintering, and then the particle size of the spray powder is controlled to be 15-45 μm by crushing, screening and grading. The CS-2000 cold spraying system independently developed by Xi'an Jiaotong University is used to deposit 0.5mm of hard alloy coating on the upper surface of BCu solder strip, and the PPS-3000 plasma spraying system is used to deposit 0.3mm of YJ2 flux layer on the lower surface of BCu solder strip , the substrate is Q235 carbon steel, and 24 mesh brown jade sand is used for sandblasting, and then the brazing material and substrate are brazed by induction heating. The product of embodiment 1 is carried out abrasive wear test, and abrasive wear test is carried out ...

Embodiment 2

[0031] The solder alloy is prepared into a BCu58ZnMn solder strip with a thickness of 1mm through smelting, extrusion, rolling and other processes. The cemented carbide is made of 20-30 mesh cast tungsten carbide powder and Co powder, and is subjected to stirring ball milling, spray granulation and vacuum The powder block WC12Co is obtained by sintering, and then the particle size of the spray powder is controlled to be 15-45 μm by crushing, screening and grading. The CS-2000 cold spraying system independently developed by Xi'an Jiaotong University was used to deposit a 2mm hard alloy coating on the surface of the BCu58ZnMn solder strip, and the PPS-3000 plasma spraying system was used to deposit a 0.5mm YJ2 flux layer on the lower surface of the BCu58ZnMn solder strip. The substrate is Q235 carbon steel, which is sandblasted with 24 mesh brown jade sand, and then the brazing material and substrate are brazed by induction heating. The product of embodiment 2 is carried out abr...

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Abstract

The invention discloses a composite braze coating material which comprises a strip or platy braze coating material body with a three-layer structure, wherein the braze coating material body sequentially comprises a hard alloy coating, a brazing alloy layer and a brazing flux coating. The thicknesses of the hard alloy coating, and the brazing alloy layer and the brazing flux coating are adjusted between 0.001mm and 20mm. When the composite braze coating material is prepared, brazing alloy strips or plates are rolled according to design thickness, the upper surfaces of the brazing alloy strips or plates are coated with hard alloy particles in a cold spraying manner, the lower surfaces of the brazing alloy strips or plates are coated with brazing fluxes in a hot spraying manner, a certain sizes of composite braze coating material formed by the hard alloy coating, the brazing alloy layer and the brazing flux coating is prepared. The proportion of brazing alloys and the hard alloy particles is consistent, stability and consistency of braze coating quality can be effectively ensured, the brazing fluxes are quantitatively and automatically added and firmly deposited on the surfaces of the brazing alloys in a hot spraying manner, and the composite braze coating material is simple in preparation process, good in formability and convenient to store, transport and use.

Description

technical field [0001] The invention relates to a brazing coating material, in particular to a composite brazing coating material, and also relates to a preparation method of the composite brazing coating material. Background technique [0002] Cemented carbide has the advantages of high hardness, wear resistance and corrosion resistance. Some parts are often required to have high wear resistance and corrosion resistance on the local surface. If the parts are made of solid carbide, not only the cost is high, Moreover, the overall mechanical properties and other aspects often cannot meet the requirements. Through physical vapor deposition (PVD), chemical vapor deposition (CVD), thermal spraying, surfacing and brazing methods, a layer of hard alloy can be coated on the surface of the part to improve the wear resistance and durability of the part surface. performance such as corrosion. The physical vapor deposition method and the chemical vapor deposition method can only obta...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K35/40
CPCB23K35/24B23K35/40
Inventor 钟素娟龙伟民董博文马佳朱坤孙华为薛行雁赵辰丰侯江涛李永刘洁高雅
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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