Channel powder removal method for high-energy-beam 3D printing cooling board and product

A heat dissipation cold plate and 3D printing technology, applied in the field of additive manufacturing, can solve the problems of post-processing and incomplete removal of the inner surface of the flow channel, and achieve the effect of reducing the surface roughness of the flow channel, easy to promote, and rapid corrosion removal.

Inactive Publication Date: 2020-08-18
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method and product for removing powder from the flow channel of a high-energy beam 3D printed heat dissipation cold plate, the purpose of which is to efficiently and thoroughly remove the residual unmelted powder in the flow channel, and at the same time lift the flow channel powder. Surface quality, solving a series of problems faced by the existing powder removal technology, such as incomplete removal and post-processing of the inner surface of the flow channel.

Method used

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  • Channel powder removal method for high-energy-beam 3D printing cooling board and product

Examples

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Embodiment 1

[0040] A method for removing residual powder in a flow path of an SLM formed aluminum alloy AlSi10Mg heat dissipation cold plate, comprising the following steps:

[0041](1) Preliminarily remove most of the filling powder inside the flow channel through the traditional physical method of "high pressure gas / liquid flushing + mechanical vibration"; apply anti-corrosion paint on the outer surface of the heat dissipation cold plate, and the composition of the paint is the same as that of AlSi10Mg alloy Commonly used anti-chemical corrosion coatings are the same, such as J64-31 black neoprene peelable paint, and the coating thickness is 0.1mm;

[0042] (2) The heat dissipation cold plate coated with anti-corrosion paint on the outer surface is subjected to "ultrasonic cleaning / chemical milling" composite powder cleaning treatment, wherein the chemical corrosion solution is a mixed alkali solution (the composition ratio is NaOH130g / L, Na2S 15g / L, TEA (triethanolamine) 40g / L, Al 3+ ...

Embodiment 2

[0045] A method for removing residual powder in the flow channel of the SLM formed copper alloy H90 heat dissipation cold plate, comprising the following steps:

[0046] (1) Through the traditional physical method of "vacuum blowing + mechanical vibration + high-pressure gas / liquid flushing", most of the filling powder inside the flow channel is preliminarily removed; the outer surface of the heat dissipation cold plate is coated with anti-corrosion paint, and the composition of the paint is It is the same as the commonly used anti-chemical corrosion coating for H90 alloy, such as organosilicon sol-gel, and the coating thickness is 0.2mm;

[0047] (2) The heat dissipation cold plate coated with anti-corrosion paint on the outer surface is subjected to "ultrasonic cleaning / chemical milling" composite powder cleaning treatment, in which the volume fraction of the chemical corrosion solution is 15% HNO 3 +20%HCL+65%H 2 The mixed acid solution of O, the temperature of the chemica...

Embodiment 3

[0050] A method for removing residual powder in the runner of an EBSM formed aluminum-lithium alloy 2099 heat dissipation cold plate, comprising the following steps:

[0051] (1) Through the traditional physical method of "vacuum blowing + mechanical knocking", most of the filling powder inside the flow channel is preliminarily removed; the outer surface of the heat dissipation cold plate is coated with anti-corrosion paint, and the paint composition is the same as that of 2099 alloy. The anti-chemical corrosion coating is the same, such as HX-500 chemical milling protective glue, the coating thickness is 0.3mm;

[0052] (2) The heat dissipation cold plate coated with anti-corrosion paint on the outer surface is subjected to "ultrasonic cleaning / chemical milling" composite powder cleaning treatment, wherein the chemical corrosion solution is a mixed alkali solution (the composition ratio is NaOH 145g / L, NaOH 2 S 16g / L, TEA 45g / L, Al 3+ 18g / L), the temperature of the chemical ...

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Abstract

The invention belongs to the technical field of additive manufacturing, and particularly discloses a channel powder removal method for a high-energy-beam 3D printing cooling board and a product. The method includes the following steps of firstly, removing part of residual powder in channels of the high-energy-beam 3D printing cooling board, and coating the outer surface of the cooling board with anti-corrosion paint; secondly, washing the cooling board through an ultrasonic washing/chemical milling combined process so as to thoroughly remove the rest of powder in the channels, and meanwhile performing polishing treatment on the surfaces of the channels; and thirdly, removing residual chemical corrosive liquid in the channels of the cooling board and the anti-corrosion paint coated on the outer surface of the cooling board, and performing drying to obtain the required cooling board. By means of the method, residual non-molten powder in the channels of the cooling board can be efficiently and thoroughly removed, meanwhile the quality of the inner surfaces of the channels is improved, and the problems that removing is not thorough and the inner surfaces of the channels still need to be subjected to after-treatment by means of an existing powder removing technology are solved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and more specifically relates to a method and product for removing powder from a flow path of a high-energy beam 3D printed heat dissipation cold plate. Background technique [0002] The heat dissipation cold plate is the core metal component of various high-efficiency and high-power electronic systems in the fields of aviation, aerospace, national defense, and communications. It has the functions of heat dissipation and structural load-bearing, and is an important guarantee for the long-term stable operation of electronic systems. With the rapid development of aviation, aerospace and other fields, all kinds of electronic systems have higher and higher requirements on the cooling efficiency, carrying capacity and light weight of the cold plate. And the requirements for surface roughness are also increasing. When using traditional low-temperature brazing and other processes for for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y40/00B08B3/12C23F1/04
CPCB33Y40/00B08B3/12C23F1/04B22F10/00B22F10/68B22F10/28B22F10/73B22F10/70Y02P10/25
Inventor 魏恺文刘梦娜曾晓雁李祥友杨雄
Owner HUAZHONG UNIV OF SCI & TECH
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