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A method for preparing ultra-high hardness cladding layer by synchronous ultrasonic vibration assisted laser technology

A technology of ultrasonic vibration and auxiliary laser, which is applied in coating, metal material coating process, etc., can solve problems such as complex process, achieve good working environment, high hardness, and save process time.

Inactive Publication Date: 2017-02-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during multi-layer and multi-pass cladding, laser cladding and ultrasonic impact appear alternately, and the process is more complicated

Method used

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  • A method for preparing ultra-high hardness cladding layer by synchronous ultrasonic vibration assisted laser technology
  • A method for preparing ultra-high hardness cladding layer by synchronous ultrasonic vibration assisted laser technology
  • A method for preparing ultra-high hardness cladding layer by synchronous ultrasonic vibration assisted laser technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing an ultra-high hardness cladding layer by synchronous ultrasonic vibration-assisted laser technology, the specific process steps are as follows:

[0042] (1) Taking 45# steel as the treatment object, first use sandpaper to remove rust on the surface of 45# steel, and then wipe the surface of high chromium cast steel with acetone to remove oil stains;

[0043] (2) Will contain 50wt% WC and 5wt% CaF 2 The Ni-based powder of the powder is kept at 200°C for 1h, and then the cladding powder is pre-placed on the surface of 45# steel with a thickness of 1mm;

[0044] (3) Fix 45# steel to the end of the ultrasonic vibration device with bolts;

[0045] (4) Laser cladding treatment is carried out by continuous lapping, and the specific process parameters are: 5kW cross-flow CO 2 Laser processing system, the spot size is 10mm×1mm, the power is 3500W, and the scanning speed is 200mm / min, and the overlap is 2.0mm, and the 45# steel surface is continuously sca...

Embodiment 2

[0052] A method for preparing an ultra-high hardness cladding layer by synchronous ultrasonic vibration-assisted laser technology, the specific process steps are as follows:

[0053] (1) Taking 45# steel as the treatment object, first use sandpaper to remove rust on the surface of 45# steel, and then wipe the surface of high chromium cast steel with acetone to remove oil stains;

[0054] (2) Will contain 60wt% WC and 5wt% CaF 2 The Ni-based powder of the powder is kept at 300°C for 1h, and then the cladding powder is pre-placed on the surface of 45# steel with a thickness of 1mm;

[0055] (3) Fix 45# steel to the end of the ultrasonic vibration device with bolts;

[0056] (4) Laser cladding treatment is carried out by continuous lapping, and the specific process parameters are: 5kW cross-flow CO 2 Laser processing system, the spot size is 10mm×1mm, the power is 3600W, and the scanning speed is 250mm / min, and the overlap is 2.0mm, and the 45# steel surface is continuously sca...

Embodiment 3

[0064] A method for preparing an ultra-high hardness cladding layer by synchronous ultrasonic vibration-assisted laser technology, the specific process steps are as follows:

[0065] (1) Taking 45# steel as the treatment object, first use sandpaper to remove rust on the surface of 45# steel, and then wipe the surface of high chromium cast steel with acetone to remove oil stains;

[0066] (2) Will contain 60wt% WC and 5wt% CaF 2 The Ni-based powder was kept at 250°C for 1 hour, and then the cladding powder was pre-placed on the surface of 45# steel with a thickness of 1mm;

[0067] (3) Fix 45# steel to the end of the ultrasonic vibration device with bolts;

[0068] (4) Laser cladding treatment is carried out by continuous lapping, and the specific process parameters are: 5kW cross-flow CO 2 Laser processing system, the spot size is 10mm×1mm, the power is 3550W, and the scanning speed is 200mm / min, and the overlap is 1.8mm, and the 45# steel surface is continuously scanned; be...

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Abstract

The invention provides a method for preparing ultra-high hardness cladding layer by synchronous ultrasonic vibration assisted laser technology. The specific scheme is to introduce ultrasonic vibration synchronously in the process of cladding Ni-based cermet coating, and this method can improve the flow of liquid metal In the process of solidification, the growing dendrite network can be broken and dispersed to various parts of the melt to form evenly distributed small crystal nuclei to prevent segregation of cermets, thereby It ensures that the cladding layer does not crack while obtaining ultra-high hardness; the equipment is simple, it is convenient for calibration and installation, the energy consumption is small, and the working environment is good. The obtained coating cermet has uniform particle distribution, high hardness and good wear resistance.

Description

[0001] Technical field: [0002] The invention belongs to the field of surface engineering, and specifically relates to a method for preparing an ultra-high hardness cladding layer by synchronous ultrasonic vibration-assisted laser technology, which is suitable for surface strengthening treatment of workpieces with high requirements on hardness and wear resistance. [0003] Background technique: [0004] As an emerging technology in the field of surface engineering technology, laser cladding refers to placing selected coating materials on the surface of the substrate to be clad in different ways, and heating it with a high-energy laser beam to form a thin layer with the surface of the substrate. It melts at the same time and forms a surface coating with extremely low dilution and metallurgical combination with the base material after rapid solidification, thereby significantly improving the wear resistance, corrosion resistance, heat resistance and oxidation resistance of the ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/05C22C32/00C22C30/00
CPCC22C19/058C22C29/08C22C30/00C22C32/0047C23C24/103
Inventor 李美艳王勇韩彬郭兰阳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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