Laser melting deposition ceramic particle enhanced metal-base composite coating based on tubular powder core wire and machining method

A laser melting deposition, metal matrix composite technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of insufficient metallurgical reaction, pore cracks, etc. good effect

Inactive Publication Date: 2020-04-07
TIANJIN UNIV
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Problems solved by technology

However, during laser processing, the cooling rate of the molten pool is very fast. Under the condition of rapid cooling, the metallurgical reaction between the powder systems with complex components is insufficient, and defects such as pores and cracks will occur instead. Therefore, this method has not been used in the industrial field. widely used in

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  • Laser melting deposition ceramic particle enhanced metal-base composite coating based on tubular powder core wire and machining method
  • Laser melting deposition ceramic particle enhanced metal-base composite coating based on tubular powder core wire and machining method
  • Laser melting deposition ceramic particle enhanced metal-base composite coating based on tubular powder core wire and machining method

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Embodiment Construction

[0038] The technical scheme of the present invention concerning laser melting deposition of particle-reinforced metal-based composite coatings based on tubular powder core wires will be further described below in conjunction with specific examples.

[0039] The example of the present invention adopts Fe-WC type tubular powder core wire material, which means that the outer layer metal of the wire material is Fe-based, and the filling ceramic powder adopts WC. The crystal structure of WC is hexagonal, which has the characteristics of high melting point, high hardness, high elastic modulus and high compressive strength, and it is a carbide with high hardness at high temperature, which has good oxidation resistance and corrosion resistance. . Moreover, WC ceramic particles and iron have very good wettability. In the coating, the matrix can cover WC particles to support and protect them. Its cross-section is as follows: figure 2 As shown, the wire diameter is 1.6mm, and the outer...

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Abstract

The invention discloses a laser melting deposition ceramic particle enhanced metal-base composite coating based on a tubular powder core wire and a machining method. A tubular metal layer serves as ametal base body, a filler serves as a ceramic particle enhancing phase, the advantages of the powder sending type and the advantages of the wire sending type are combined, and under the action of lasers, not only can the stable and smooth globular transfer process in the ceramic particle even distribution process be formed, but also the cladding efficiency, material utilization rate and automationdegree are high; and the continuous stable injection transition process can be realized through the wire. In addition, since the lasers are used as a heat source, heat input is precise and controllable, and the compact no-defect composite coating with low dilution rate and evenly distributed enhancing particles can be prepared.

Description

technical field [0001] The invention belongs to the technology of laser melting deposition, and more specifically relates to the use of a tubular powder core wire material for ceramic particle-reinforced metal-based composite coating and its processing method. Background technique [0002] With the development of my country's economy and the improvement of science and technology, the quantity and quality of production equipment in the field of industrial manufacturing are also increasing. During the actual service of the equipment, the performance of its parts determines the production efficiency. During the working process of mechanical equipment, it is inevitable to be in contact with the external environment, such as high temperature, high pressure or friction, which will produce certain effects on the outer surface of metal parts, such as metal failure, including wear, corrosion, fatigue and fracture And so on are often started by the metal surface. For example, wear f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 杨立军赵圣斌孙涛许赛黄一鸣
Owner TIANJIN UNIV
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