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Anticorrosion CuAlFeNi laser cladding coating layer material and preparation method thereof

A coating material and laser cladding technology, applied in the direction of coating, metal material coating process, etc., can solve the problems of high consumption and high cost of copper alloys, and achieve the effect of excellent corrosion resistance

Active Publication Date: 2015-02-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when aluminum bronze alloy is used as some wear-resistant parts and corrosion-resistant parts, the economic loss caused by wear and corrosion failure is quite serious.
For copper alloy devices used in industry, in order to ensure that they have good properties such as friction reduction and corrosion resistance, the conventional process adopts the integral forming method to process copper alloy parts. The consumption of copper alloy is large and the cost is high, and the failure of parts often occurs in surface

Method used

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  • Anticorrosion CuAlFeNi laser cladding coating layer material and preparation method thereof
  • Anticorrosion CuAlFeNi laser cladding coating layer material and preparation method thereof
  • Anticorrosion CuAlFeNi laser cladding coating layer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Including the following steps:

[0018] (1) The components of the copper alloy powder are: 88wt% Cu, 8wt% Al, 1.5t% Fe, 1.5wt% Ni, 0.5wt% Cr and 0.5wt% Ti according to mass percentage. The raw materials are weighed and prepared according to the mass percentage of the above components, the alloy material is melted and atomized to obtain copper alloy powder, and the powder of 10-100 μm is obtained after sieving.

[0019] (2) The base material is 304 stainless steel with a size of 150×120×3mm, and the wavelength is 10.6μmCO 2 Laser, install and debug the laser cladding device, the angle between the powder feeding head and the laser beam is 60°, the shielding gas nozzle is 10mm away from the workpiece, the argon gas flow rate is 15L / min, transfer to the control program, start the circulating cooling water and laser equipment. The laser power is 2500W, the positive defocus is 20mm, the scanning speed is 600mm / min, the overlapping rate is 60%, and the powder speed is 40g / mi...

Embodiment 2

[0022] It is the same as Example 1 except the following steps.

[0023] (1) The components of the copper alloy powder are respectively by mass percentage: 84wt% Cu, 9wt% Al, 1.9wt% Fe, 4.5wt% Ni, 0.3wt% Cr and 0.3wt% Ti, and the particle size is 10- The single-element powder of 100 μm was mixed in a ball mill for 3 hours according to the above alloy ratio, and a uniform powder was obtained after mixing; the powder was dried in a drying oven for 4 hours at a drying temperature of 120°C.

[0024] (2) The base material is cylindrical 45# steel with a diameter of 20mm, installed on the turntable of the machine tool, and cladding is performed on the surface by a semiconductor laser with a wavelength of 800nm-1100nm. The laser power is 2000W, the defocus of the light spot is 30mm, the angle between the powder feeding head and the laser beam is 40°, the linear speed of the workpiece is 3000mm / min, the angular speed of the turntable is 1719° / min, the overlap rate is 30%, and the X-axi...

Embodiment 3

[0027] It is the same as Example 1 except for the following steps.

[0028] (1) The components of the copper alloy powder are: 77wt% Cu, 11wt% Al, 2.8wt% Fe, 9.0wt% Ni, 0.1wt% Cr and 0.1wt% Ti in terms of mass percentage. .

[0029] (2) The base material is 316L stainless steel with a size of 700×250×20mm, a fiber laser with a wavelength of 1070nm, a laser power of 1500W, a positive defocus of the light spot of 25mm, an angle of 50° between the powder feeding head and the laser beam, and a scanning speed of 200mm / min, the overlap rate is 50%, the gas flow rate of argon shielding gas is 12L / min, and the powder feeding speed is 17g / min.

[0030] The copper alloy cladding coating obtained in Example 3 has good performance, and the electrochemical test is carried out under the condition of 3.5% NaCl neutral electrolyte, and the corrosion current of the cladding coating is 5.72×10 -7 A·mm -2 , the self-corrosion potential is -0.296V (SCE), and its corrosion resistance is good.

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Abstract

The invention discloses an anticorrosion CuAlFeNi laser cladding coating layer material and a preparation method thereof, and belongs to the surface coating layer field. A copper alloy spherical powder which can improve the surface corrosion resisting property is prepared, and comprises the following components by the weight percentage: 75-88 wt% of Cu, 8-11 wt% of Al, 0.1-3 wt% of Fe, 0.1-0.5 wt% of Cr, 0.1-0.5 wt% of Ti, and 1.5-9 wt% of Ni. A CuAlFeNi cladding coating layer is prepared by adopting a continuous laser hot source with the wavelength of 800 nm-10.6 [mu]m, the laser power is 1500-2500 W, the scanning speed is 180-600 mm / min, the out-of-focus is 20-30 mm, the lap-joint rate is 30-60%, the argon gas protection flow rate is 10-15 L / min in a cladding process, and the powder feeding rate is 15-40 g / min. With adopting of the technology, the cladding coating layer with a certain thickness is obtained, the metallurgy quality is good, the structure distribution is uniform, and the corrosion resistance is excellent.

Description

Technical field: [0001] The invention relates to the field of preparing copper alloy materials, in particular to a seawater corrosion-resistant material system of copper alloys and a method for laser cladding coatings on metal surfaces. Background technique: [0002] Copper alloy has good thermal and electrical conductivity and corrosion resistance, low friction coefficient and high strength, and is widely used in machinery, chemical industry and automobile industries. Aluminum-copper alloy has good resistance to seawater corrosion and marine organism adhesion, and can be used to manufacture corrosion-resistant parts, such as propellers, valves, and pipes, and has been widely used in marine engineering. However, when aluminum bronze alloy is used as some wear-resistant parts and corrosion-resistant parts, the economic loss caused by wear and corrosion failure is quite serious. For copper alloy devices used in industry, in order to ensure that they have good properties such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C9/01C22C9/06
CPCC22C9/01C22C9/06C23C24/106
Inventor 杨胶溪文强李子阳肖志勇
Owner BEIJING UNIV OF TECH