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Layered composite brazing coating material and preparation method thereof

A technology of layered composite and brazing material, which is applied in the direction of metal layered products, chemical instruments and methods, welding/cutting media/materials, etc., can solve the problems of low work efficiency, high cost, waste of brazing flux, etc., and achieve formability Good, easy to store, simple preparation process

Active Publication Date: 2016-11-16
CHINA INNOVATION ACADEMY OF INTELLIGENT EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional brazing materials are usually prepared by preparing powdered brazing material, cemented carbide particles, adhesives, organic matter, etc. into a suspended slurry brazing material or sheet brazing material, and then coated or bonded on 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 the cemented carbide particles and the base metal, it is often necessary to continuously add flux during the brazing coating process, which is low in work efficiency and easily causes flux loss. A lot of waste, high cost

Method used

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  • Layered composite brazing coating material and preparation method thereof
  • Layered composite brazing coating material and preparation method thereof
  • Layered composite brazing coating material and preparation method thereof

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preparation example Construction

[0023] The preparation method of layered composite braze-coated material of the present invention is divided into strip and tubular two kinds:

[0024] 1. Preparation of strip brazing material:

[0025] First, the mixture of cemented carbide particles, brazing flux and organic binder is uniformly coated on the surface of the brazing alloy, and then a certain thickness of brazing alloy is placed on the surface of the mixture, and the precision rolling mill is used to roll it into the required A finished product of three-layer composite brazing coating material with a band structure composed of a brazing alloy inner layer 1, a mixture middle layer 2 and a brazing alloy outer layer 3;

[0026] 2. Preparation of tubular brazing material:

[0027] First, the mixture of cemented carbide particles, flux and organic binder is uniformly coated on the surface of the tubular solder alloy, and then the strip-shaped solder alloy is rolled through multiple passes, and the tubular solder al...

Embodiment 1

[0030] The outer layer 3 of the solder alloy is BAg40CuZnCdNi (national standard brand HL312, calculated by mass fraction percentage, Ag-Cu16-Zn18-Cd26-Ni0.2) with a thickness of 0.1 mm, and the inner layer 1 of the solder alloy is 0.3 mm thick. mm BAg40CuZnCdNi solder alloy strip, the cemented carbide particles in layer 2 of the mixture should be cast tungsten carbide powder of 20-30 meshes, the brazing flux should be FB102, the ratio of cemented carbide particles to brazing flux is 10:1 by weight, and the finished product The layered composite brazing material has a thickness of 0.6 mm and a width of 3 mm. The base material is Q235 carbon steel, and the size after brazing is 57mm×25.5mm×6mm. Carry out abrasive wear test to the brazed coating product of embodiment 1, abrasive wear test is carried out on MLG-130A type dry type rubber wheel abrasive wear tester, test load is 20N, abrasive material is No. 120 brown corundum sand, rubber wheel speed is 100r / min, the sand flow ra...

Embodiment 2

[0032] The outer layer 3 of the brazing alloy is a BCu58ZnMn (national standard brand HL105, calculated by mass fraction percentage, Cu-Zn38-Mn) brazing alloy strip with a thickness of 0.2mm, and the inner layer 1 of the brazing alloy is a BCu58ZnMn brazing alloy with a thickness of 0.3mm Belt, cemented carbide particles in layer 2 of the mixture choose 20-30 mesh cast tungsten carbide powder, brazing flux chooses QJ308, the ratio of cemented carbide particles to brazing flux is 10:1 by weight, and the finished layered composite brazing coating material The thickness is 0.5mm and the width is 3mm. The base material is Q235 carbon steel, and the size after brazing is 57mm×25.5mm×6mm. Carry out abrasive wear test to the brazed coating product of embodiment 2, abrasive wear test is carried out on MLG-130A type dry type rubber wheel abrasive wear tester, test load is 20N, abrasive material is No. 120 brown corundum sand, rubber wheel speed is 100r / min, the sand flow is 100g / min, ...

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Abstract

The invention discloses a layered composite brazing coating material. The layered composite brazing coating material is a belt-shaped structure consisting of a brazing filler metal alloy inner layer, a mixture middle layer including hard alloy particles and a brazing flux and a brazing filler metal alloy outer layer, or a drawn pipe-shaped structure. The brazing filler metal alloy inner layer is 0.01-1 mm thick; the mixture middle layer is 0.1-4 mm thick; and the brazing filler metal alloy outer layer is 0.1-2 mm thick. In the mixture middle layer, the weight percentage of the hard alloy particles is 80-99%. The layered composite brazing coating material has the brazing flux, is excellent in formability, and realizes quantitative and automatic adding of the brazing flux; the brazing filler metal alloy and the hard alloy are consistent in proportion to effectively guarantee the brazing coating quality; the rolled layered composite brazing coating material can be wound as a disc or a shaft; and the automatic production can be realized in the brazing coating process. Compared with a traditional suspension pulp-shaped brazing coating material or a piece-shaped brazing coating material, the layered composite brazing coating material is simple in preparation process, is convenient for storage and transportation, and can realize automatic production in the brazing coating process.

Description

technical field [0001] The invention relates to a brazing coating material, in particular to a layered composite brazing coating material, and also relates to a preparation method of the brazing coating material. Background technique [0002] In the field of machinery, the local surface of some workpieces is often required to have high wear resistance and corrosion resistance. If the whole workpiece is made of wear-resistant alloys or corrosion-resistant materials, not only the cost is high, but also the overall mechanical properties and other aspects often cannot meet the requirements. A reasonable solution is usually to use surface treatment technology, that is, to coat a layer of wear-resistant or corrosion-resistant metal or alloy on the working surface of the workpiece. As far as the wear-resistant layer is concerned, the commonly used methods are physical vapor deposition (PVD), chemical vapor deposition (CVD), thermal spraying, surfacing and brazing. Physical vapor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K35/40B32B1/08B32B9/04B32B15/01B32B15/16B32B33/00B32B37/24
CPCB23K35/24B23K35/40B32B1/08B32B9/041B32B15/01B32B15/16B32B33/00B32B37/24B32B2037/243B32B2250/03B32B2255/06B32B2255/205B32B2264/102
Inventor 钟素娟龙伟民董博文沈元勋李秀朋王平郭艳红于新泉赵辰丰纠永涛
Owner CHINA INNOVATION ACADEMY OF INTELLIGENT EQUIP CO LTD
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