A laser deposition additive manufacturing method

A technology of additive manufacturing and laser deposition, which is applied in the field of additive manufacturing, can solve the problems of incomplete fusion of titanium alloy metal powder and deposition holes, etc., and achieve the effects of reducing interface binding energy, uniform and dense structure, and improving melting effect

Active Publication Date: 2021-12-03
TSC LASER TECH DEV BEIJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the defects of incomplete fusion of titanium alloy metal powder and deposition holes in the laser deposition additive manufacturing process of titanium alloy components in the prior art, a laser deposition additive manufacturing method is provided

Method used

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  • A laser deposition additive manufacturing method
  • A laser deposition additive manufacturing method
  • A laser deposition additive manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The laser deposition additive manufacturing method in this embodiment is as follows:

[0052] S1, preparing metal powder for laser deposition additive manufacturing;

[0053] S2, select the substrate according to the deposited metal powder, and use a coaxial powder feeding deposition method under a protective atmosphere to perform laser scanning layer-by-layer deposition on the substrate, and the overlapping method of the laser scanning is negative overlapping. Wherein, the negative lap joint adopts the following method: the step size of the laser scanning is 2.25 times of the width of the melting channel. It should be noted that the method for realizing the negative lap may also be that the step size of the laser scanning is other multiples of the width of the melt path, as long as the negative lap can be realized.

[0054] In this embodiment, TSC-S4510 equipment is selected as the laser scanning equipment. Of course, other laser additive manufacturing equipment that ...

Embodiment 2

[0060] The laser deposition additive manufacturing method in this embodiment is as follows:

[0061] S1, preparing metal powder for laser deposition additive manufacturing, the metal powder, in parts by mass, has the following components: 100 parts of titanium alloy metal powder (Ti65), active powder (iron phosphorus powder, B, Sr and Bi) 0.3 parts. The mass ratio of phosphorus iron powder, B, Sr and Bi in the active powder is 3:1:1:1. The metal powder was dried in a vacuum oven for 3 hours at a drying temperature of 80 °C.

[0062] S2, in the TSC-S4510 equipment, under the argon protective atmosphere, on the pure titanium plate, adopt the coaxial powder feeding deposition method, and use the laser to perform laser scanning layer-by-layer deposition on the pure titanium plate. The lapping method of the laser scanning is negative lapping, and the negative lapping adopts the following method: the step size of the laser scanning is 1.25 times of the width of the melting channel...

Embodiment 3

[0066] The laser deposition additive manufacturing method in this embodiment is as follows:

[0067] S1. Prepare metal powder for laser deposition additive manufacturing. The metal powder has the following components in parts by mass: 100 parts of titanium alloy metal powder (TC18). The metal powder was dried in a vacuum oven for 1 hour at a drying temperature of 300 °C.

[0068] S2, in the TSC-S4510 equipment, under the argon protective atmosphere, on the pure titanium plate, adopt the coaxial powder feeding deposition method, and use the laser to perform laser scanning layer-by-layer deposition on the pure titanium plate. The lapping method of the laser scanning is negative lapping, and the following method is adopted for the negative lapping: the step size of the laser scanning is 1.2 times of the width of the melting channel, and the lapping rate of the laser scanning is 40%. The laser scanning method is to scan the serpentine path first, and then perform reverse serpenti...

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Abstract

The invention relates to the technical field of additive manufacturing, and discloses a laser deposition additive manufacturing method, which adopts a scanning mode of negative lapping, serpentine scanning first and then reverse serpentine scanning, and the lapping rate is controlled within 30%-40%. , The metal powder for laser deposition additive manufacturing contains active powder, which can eliminate holes, cracks and other defects during the laser deposition process of titanium alloys. The internal structure of the manufactured titanium alloy components is uniform and dense, and the appearance is smooth.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a laser deposition additive manufacturing method. Background technique [0002] Laser Melt Deposition (LMD)) uses a high-power and high-brightness laser as the heat source, and the powder is fed synchronously. The powder to be melted is directly sent into the molten pool generated by the high-energy beam laser, and the machine tool Or the robot guides the high-energy beam laser to walk layer by layer according to the trajectory, and the layers are piled up to finally form three-dimensional metal parts. Laser deposition additive manufacturing can precisely control energy input, spot diameter (melt channel width), forming method, scanning path and layer thickness, and realize the forming and manufacturing of metal parts with arbitrary complex shapes. For thin-walled aerospace components with complex shapes that require lightweight, high efficiency, and high reliability, tradi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F10/366B22F10/28B22F1/00B33Y10/00B33Y70/00
CPCB22F1/0007B33Y10/00B33Y70/00B22F10/00B22F10/28B22F10/36B22F10/32Y02P10/25
Inventor 郭明海
Owner TSC LASER TECH DEV BEIJING CO LTD
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