A Method of Improving the Utilization Rate of Laser Deposition Powder

A technology of laser deposition and utilization rate, which is applied in the direction of improving energy efficiency, process efficiency, coating, etc., can solve the problems of poor effective utilization rate of powder and low deposition efficiency, so as to improve utilization rate, increase deposition efficiency, improve The effect of effective utilization

Active Publication Date: 2021-03-30
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of poor effective utilization rate of powder and low deposition efficiency in the existing metal (based) powder laser deposition technology, the present invention provides a method for improving the utilization rate of laser deposition powder

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  • A Method of Improving the Utilization Rate of Laser Deposition Powder

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Embodiment 1

[0028] A method for improving the utilization rate of laser deposition powder, comprising the steps of:

[0029] (1) The mixed metal powders of Fe, Ni, and Co powders with mass percentages of 70%, 18%, and 12% are used, and the particle size of the metal powders is 325 mesh; 30Cr13 stainless steel plates are used as the base material, wherein the stainless steel plates The chemical composition is C: 0.30%, Cr: 13.0%, Ni: 0.50%, Si: 0.80%, Mn: 0.70%, P: 0.03%, S: 0.02%, and the rest is Fe. The steel plate is used in the annealed state, The size is 40mm×40mm;

[0030] (2) Weigh 200g of Fe, Ni and Co powders according to the proportion, mix them in a powder mixer for 8 hours, put them in a vacuum drying oven, dry them at 90°C for half an hour, and put them into a scraper type powder feeder; Polish the surface of the stainless steel substrate, wipe it clean with alcohol and dry it naturally;

[0031] (3) Set the laser cladding process parameters, the laser power is 1800W, the sc...

Embodiment 2

[0034] A method for improving the utilization rate of laser deposition powder, comprising the steps of:

[0035] (1) The mixed metal powders of Fe, Ni, and Co powders with mass percentages of 70%, 18%, and 12% are used, and the particle size of the metal powders is 325 mesh; 30Cr13 stainless steel plates are used as the base material, wherein the stainless steel plates The chemical composition is C: 0.26%, Cr: 12.0%, Ni: 0.30%, Si: 0.5%, Mn: 0.50%, P: 0.02%, S: 0.01%, and the rest is Fe. The steel plate is in the annealed state, The size is 40mm×40mm;

[0036] (2) Weigh 200g of Fe, Ni and Co powders according to the proportion, mix them in a powder mixer for 8 hours, put them in a vacuum drying oven, dry them at 90°C for half an hour, and put them into a scraper type powder feeder; Polish the surface of the stainless steel substrate, wipe it clean with alcohol and dry it naturally;

[0037] (3) Set the laser cladding process parameters, the laser power is 1800W, the scanning...

Embodiment 3

[0040] A method for improving the utilization rate of laser deposition powder, comprising the steps of:

[0041] (1) The mixed metal powders of Fe, Ni, and Co powders with mass percentages of 70%, 18%, and 12% are used, and the particle size of the metal powders is 325 mesh; 30Cr13 stainless steel plates are used as the base material, wherein the stainless steel plates The chemical composition is C: 0.35%, Cr: 14.0%, Ni: 0.60%, Si: 1.00%, Mn: 1.00%, P: 0.04%, S: 0.03%, and the rest is Fe. The use state of the steel plate is the annealed state, The size is 40mm×40mm;

[0042] (2) Weigh 200g of Fe, Ni and Co powders according to the proportion, mix them in a powder mixer for 8 hours, put them in a vacuum drying oven, dry them at 90°C for half an hour, and put them into a scraper type powder feeder; Polish the surface of the stainless steel substrate, wipe it clean with alcohol and dry it naturally;

[0043] (3) Set the laser cladding process parameters, the laser power is 3000...

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Abstract

The invention relates to the technical field of laser additive manufacturing, and specifically discloses a method for improving the utilization rate of laser deposition powder. The method includes: pre-preparing a cladding layer with metal powder on one end of the surface of the substrate; performing magnetization treatment on the substrate and the cladding layer to form a leakage magnetic field; and performing the next pass of laser cladding under the action of the leakage magnetic field. The metal powder is ferromagnetic material or contains ferromagnetic material, and the base material is ferromagnetic material. The method provided by the invention uses the height difference between the cladding layer and the surface of the area to be deposited to magnetize the ferromagnetic substrate and the cladding layer to form a leakage magnetic field, which has a good attraction effect on the ferromagnetic metal powder, making the nozzle The sent powder can be more accurately converged on the laser scanning path, improving the effective utilization rate and deposition efficiency of the powder.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, in particular to a method for improving the utilization rate of laser deposition powder. Background technique [0002] Metal (based) powder laser deposition technology is a laser additive manufacturing technology that designs a laser scanning trajectory through a pre-established model, and then prepares a cladding layer or part on a certain substrate. This technology offers high design flexibility and a variety of forming materials. Coatings or parts with different properties such as high strength, corrosion resistance and wear resistance can be prepared according to different working conditions. Metal (based) powder laser deposition technology can not only be used for rapid manufacturing of metal (based) parts, but also for three-dimensional repair of parts, especially large and medium-sized metal parts, so as to realize its remanufacturing and greatly reduce the production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F10/28C22C38/08C22C38/10C22C38/02C22C38/04C22C38/40B33Y10/00B33Y70/00
CPCC23C24/10B33Y10/00B33Y70/00B22F10/00B22F10/32B22F10/25B22F10/36B22F10/50Y02P10/25
Inventor 曹雅彬
Owner SHIJIAZHUANG TIEDAO UNIV
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