Method for preparing defect-free abrasion-resistant coating with assistance of synchronous ultrasonic shot blasting

An ultrasonic shot peening and anti-corrosion technology, which is applied in coating and metal material coating processes, etc., can solve the problems of uneven strengthening effect of cladding layer, full coverage of refractory cladding layer, and unsatisfactory synchronous auxiliary strengthening effect. , to reduce defects such as cracks and pores, enhance compactness and interfacial bonding strength, and improve fatigue resistance and service life.

Pending Publication Date: 2021-12-10
华能汕头海门发电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods play a beneficial role in improving the structure and performance of laser cladding coatings, they all rely on the contact between the ultrasonic vibration head and the surface of the cladding layer (the contact method is almost point contact), and it is difficult to realize the improvement of the cladding layer due to the small contact area. The cladding layer is fully covered, and it is easy to cause uneven strengthening in the cladding layer, so the synchronous auxiliary strengthening effect is not ideal

Method used

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  • Method for preparing defect-free abrasion-resistant coating with assistance of synchronous ultrasonic shot blasting
  • Method for preparing defect-free abrasion-resistant coating with assistance of synchronous ultrasonic shot blasting
  • Method for preparing defect-free abrasion-resistant coating with assistance of synchronous ultrasonic shot blasting

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Effect test

Embodiment 1

[0049] Such as Figure 1-2 As shown, a method for synchronous ultrasonic shot peening of the present invention to assist in the preparation of a defect-free and wear-resistant coating is specifically implemented according to the following steps:

[0050] First, the 45# steel substrate shaft is used as the processing shaft sample 9 to prepare a laser cladding wear-resistant coating on its surface, and the 45# steel substrate shaft sample is installed on the integrated processing platform 4 for surface cleaning and derusting Processing, using sandpaper or grinding wheel to remove rust and stains on the surface of the machining shaft sample 9;

[0051] The Stellite6 alloy powder with a particle size range of 40-150 μm is used as cladding powder and baked in a vacuum drying oven to avoid powder oxidation. The baking temperature is 120°C and the baking time is 30 minutes, and then the powder is poured into the synchronous powder feeder 2 middle;

[0052] Adjust and set the power ...

Embodiment 2

[0060] The present invention is a method for synchronous ultrasonic shot peening to assist in the preparation of a defect-free and wear-resistant coating, which is specifically implemented according to the following steps:

[0061] First, the 16Mn shaft sample is used as the processing shaft sample 9 to prepare a laser cladding wear-resistant coating on its surface, and the 16Mn shaft sample is installed on the integrated processing platform 4 for surface cleaning and derusting treatment, using sandpaper or grinding wheel Remove the rust and stains on the surface of the machining shaft sample 9;

[0062] Put 316L with a particle size range of 100-170 μm as cladding powder and bake in a vacuum drying oven to avoid powder oxidation. The baking temperature is 150°C and the baking time is 30 minutes, and then the powder is poured into the synchronous powder feeder 2 ;

[0063] Adjust and set the power of laser 1 to 1-3KW, the distance from cladding head 3 to the sample surface is...

Embodiment 3

[0070] The present invention is a method for synchronous ultrasonic shot peening to assist in the preparation of a defect-free and wear-resistant coating, which is specifically implemented according to the following steps:

[0071] First, the 45# steel substrate shaft is used as the processing shaft sample 9 to prepare a laser cladding wear-resistant coating on its surface, and the 45# steel substrate shaft sample is installed on the integrated processing platform 4 for surface cleaning and derusting Processing, using sandpaper or grinding wheel to remove rust and stains on the surface of the machining shaft sample 9;

[0072] Put the Ni60 alloy powder with a particle size of 10-60 μm as cladding powder in a vacuum drying oven to avoid powder oxidation. The baking temperature is 150°C and the baking time is 40 minutes, and then the powder is poured into the synchronous powder feeder 2 middle;

[0073] Adjust and set the power of laser 1 to 4KW, the distance from cladding head...

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Abstract

The invention discloses a method for preparing a defect-free abrasion-resistant coating with the assistance of synchronous ultrasonic shot blasting. The method specifically comprises the following steps that a to-be-machined shaft sample is fixed to an integrated machining platform, and surface cleaning and rust removal treatment are conducted; powder to be used for cladding is baked and dehumidified and is loaded into a synchronous powder feeder; high-speed laser cladding parameters and the translation rate of a cladding head are set; a moving controller in the synchronous ultrasonic shot blasting system is adjusted and moved, so that a shot blasting cavity is just located under the cladding head and located on the same horizontal plane with the cladding head, and the synchronous ultrasonic shot blasting system and the cladding head are identical in translation rate and move in the same direction; and the high-speed laser cladding system and the ultrasonic shot blasting auxiliary system are started at the same time until the cladding process is finished, and the defect-free abrasion-resistant coating is obtained. The method for preparing the defect-free abrasion-resistant coating with the assistance of synchronous ultrasonic shot blasting has the beneficial effects that the interior and the interface of the prepared high-speed laser cladding abrasion-resistant coating have no obvious macro-micro defects, crystal grains of the coating are obviously refined, the hardness of the coating is improved, the abrasion resistance of the coating is obviously improved, and the service life of the coating is obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of anti-corrosion coatings on material surfaces, and in particular relates to a method for synchronous ultrasonic shot peening to assist in preparing defect-free and anti-corrosion coatings. Background technique [0002] Laser cladding technology is a surface modification technology, which uses a high-energy laser beam as a heat source to melt the cladding material and the surface of the metal substrate at the same time, and forms a coating with a low dilution rate and a metallurgical bonding interface after rapid solidification, thereby significantly improving Physical properties such as surface wear resistance, corrosion resistance and oxidation resistance of the matrix material. [0003] Using laser cladding technology, according to the actual service conditions of the workpiece material, the required high wear-resistant, corrosion-resistant or oxidation-resistant coating materials can be p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C21D7/06C22F1/00
CPCC23C24/103C21D7/06C22F1/00
Inventor 张泽雄陈飞文杨桂勉张家宽吴震海郑创伟王鹏陈余唐健
Owner 华能汕头海门发电有限责任公司
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