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Method for cladding alloy on surface of metallic matrix

A metal substrate and cladding alloy technology, which is applied in the field of cladding alloys on the surface of metal substrates, can solve the problems of low oxidation resistance of cobalt-based alloys, poor cladding, slagging performance, and reduced machinability, etc., to meet high temperature resistance Ease of wear, ease of operation, and life-enhancing effects

Inactive Publication Date: 2011-07-06
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Deficiencies of cobalt-based alloys: (1) The oxidation resistance of cobalt-based alloys is usually much lower than that of nickel-based alloys
(4) The more carbon content, the greater the macroscopic hardness and the improved anti-abrasive wear performance, but the impact resistance, weldability and machining performance will all decrease
Because it does not contain B and the content of Si is relatively low, so its melting point is high, and its cladding and slagging performance is poor. The protection of the molten pool during the cladding process is obviously not as good as that of self-fluxing powder.

Method used

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  • Method for cladding alloy on surface of metallic matrix

Examples

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Comparison scheme
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Embodiment 1-10

[0030] A method for cladding an alloy on the surface of a metal substrate, using different metal substrates, and cladding different alloys on the metal substrate, the composition of the metal substrate is shown in Table 1, and the composition of the alloy is shown in Table 2. In this embodiment, 45 steel is used as the metal matrix, and Stellite6 is used as the cladding alloy.

[0031] Table 1

[0032]

[0033] Table 2

[0034] Material

[0035] Using GS-2000 type cross-flow CO 2 Laser cladding is carried out on complete sets of laser processing equipment with a maximum output power of 2.0kW. The laser processing machine tool is equipped with a numerical control system and a synchronous powder feeder, which is used for synchronous powder feeding single-channel and multi-channel lap cladding Stellite6 alloy (grain size is 45-160μm). During the cladding process, argon gas is blown to protect the molten pool to prevent oxidation. The process parameters of laser cla...

Embodiment 11-22

[0040] A method for cladding an alloy on the surface of a metal substrate, using a nickel-based alloy as the metal substrate, and HMSP2528 and HMSP2537 powders as the cladding alloy, with a particle size of 53-153 μm. Using TJ-HL-T500 cross-flow CO 2 The complete set of laser processing machine tool is used for laser cladding, the maximum output power is 5kw, and the synchronous powder feeder is used to send the powder directly to the molten pool through the funnel and conveyor for cladding. The powder is preheated for 2 hours, and the preheating temperature is 150 °C. Example 11-Example 16 uses HMSP2528 synchronous powder feeding laser cladding, and the process parameters are shown in Table 4. Example 17-Example 22 uses HMSP2537 synchronous powder feeding laser cladding, and the process parameters are shown in Table 5. Argon gas is used to protect the molten pool during laser cladding.

[0041] Table 4 Process parameters of nickel-based alloy surface cladding HMSP2528 powder...

Embodiment 23-29

[0047] A method for cladding an alloy on the surface of a metal substrate, using a nickel-based alloy as the metal substrate, a CoCrNiAlY alloy as the cladding alloy, and a grain size of 32-185 μm. Using TJ-HL-T500 cross-flow CO 2 The complete set of laser processing machine tool is used for laser cladding, the maximum output power is 5kw, and the synchronous powder feeder is used to send the powder directly to the molten pool through the funnel and conveyor for cladding. The powder is preheated for 2 hours, and the preheating temperature is 150 °C. The process parameters of synchronous powder feeding laser cladding are shown in Table 6. Argon gas is used to protect the molten pool during laser cladding.

[0048] Table 6 Process parameters of laser cladding CoCrNiAlY alloy powder

[0049] Sample No.

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Abstract

The invention relates to a method for cladding an alloy on the surface of a metallic matrix. The method comprises the following step of: cladding a single path or multiple paths of alloy on the surface of the metallic matrix by adopting the laser cladding method under the protection of inert gases. Compared with the prior art, the invention has simple process and is convenient for operation; and the metal obtained from preparation is provided with a cladding layer with excellent performance, can meet special performance requirements of resisting high-temperature wire and high-temperature corrosion, can be used for producing a nozzle for a coal water slurry gasifier, and greatly prolongs the service life of the nozzle for the coal water slurry gasifier.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment materials, in particular to a method for cladding an alloy on the surface of a metal substrate. Background technique [0002] Laser cladding refers to placing the selected coating material on the surface of the cladding substrate in different ways of adding materials, irradiating it with laser to melt it and the thin layer of the substrate surface at the same time, and forming a very low dilution after rapid solidification, which is similar to The substrate is formed into a metallurgically bonded surface coating, which significantly improves the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the substrate surface, so as to achieve the purpose of surface modification or repair, which not only meets the specific properties of the material surface Requirements, but also save a lot of precious elements. Compared with surfacing...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 杨尚磊于治水林庆琳孙明杰
Owner SHANGHAI UNIV OF ENG SCI
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