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A modification method of metal powder interface for 3D printing

A technology of metal powder and 3D printing, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of complex process, easy cracking and low cost

Active Publication Date: 2021-05-18
哈特三维(中山)金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The 3D printing metal powder materials currently widely used have problems such as stress defects and easy cracking, which make the performance of the metal components poor. Generally, the process of controlling 3D laser forming for such problems is extremely complicated and difficult. control, the present invention proposes a method for modifying the metal powder interface for 3D printing, thereby effectively improving the performance of the metal powder material, and the process is simple and the cost is low

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) The metal is made into rods and finished into plasma gun electrode rods that can rotate at high speed. The plasma rotating electrode powder making unit is used to start the power supply. After vacuuming the furnace body, argon gas is introduced, and the electrode rods are rotated at high speed, and The plasma gun is used to strike the argon gas twice, the argon gas is ionized, and an extreme arc temperature of up to 3600°C is established between the cathode and the anode, the anode rod head melts, and droplets are ejected under the action of centrifugal force, and the droplets pass through the argon. The forced convection of the airflow is instantly cooled and solidified into powder, which is collected by falling under the action of gravity to obtain nano-scale metal powder; the metal is titanium alloy; the plasma gun is a transferred arc plasma gun with a power of 80kW, a current of 2000A, and a voltage of 70V ; The rotation speed of the metal electrode rod is 19000...

Embodiment 2

[0045] (1) The metal is made into rods and finished into plasma gun electrode rods that can rotate at high speed. The plasma rotating electrode powder making unit is used to start the power supply. After vacuuming the furnace body, argon gas is introduced, and the electrode rods are rotated at high speed, and The plasma gun is used to strike the argon gas twice, the argon gas is ionized, and an extreme arc temperature of up to 3600°C is established between the cathode and the anode, the anode rod head melts, and droplets are ejected under the action of centrifugal force, and the droplets pass through the argon. The forced convection of the airflow is instantly cooled and solidified into powder, which is collected by falling under the action of gravity to obtain nano-scale metal powder; the metal is copper-aluminum alloy; the plasma gun is a transferred arc plasma gun with a power of 60kW, a current of 2200A, and a voltage of 50V; the rotation speed of the metal electrode rod is...

Embodiment 3

[0051] (1) The metal is made into rods and finished into plasma gun electrode rods that can rotate at high speed. The plasma rotating electrode powder making unit is used to start the power supply. After vacuuming the furnace body, argon gas is introduced, and the electrode rods are rotated at high speed, and The plasma gun is used to strike the argon gas twice, the argon gas is ionized, and an extreme arc temperature of up to 3600°C is established between the cathode and the anode, the anode rod head melts, and droplets are ejected under the action of centrifugal force, and the droplets pass through the argon. The forced convection of the airflow cools instantly and solidifies into powder, which is collected by falling under the action of gravity to obtain nano-scale metal powder; the metal is magnesium-aluminum alloy; the plasma gun is a transferred arc plasma gun with a power of 80kW, a current of 1900A, and a voltage of 50V; the rotation speed of the metal electrode rod is ...

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Abstract

The invention provides a method for modifying the metal powder interface for 3D printing. The metal is made into a rotating electrode rod, the argon gas is ionized by a transferred arc plasma gun, the metal is melted at the extreme temperature of the arc, the liquid droplets are ejected under the action of centrifugal force and cooled into powder, and then mixed with the titanium source in a weak acid solution Pre-fixation, further reaction in dilute nitric acid solution to generate nano-titanium dioxide-coated metal powder, and finally millisecond laser welding can realize the interface modification of the metal powder. This method disperses firmly fixed titanium dioxide nanocrystals on the surface of the metal powder, which not only ensures the modification effect, but more importantly, overcomes the phenomenon of easy cracking and uneven stress of 3D printed metal products, improves the accuracy and strength of 3D printing, and The whole preparation method has simple technological process, is convenient to control, has low cost and can be popularized on a large scale.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to the interface modification of metal powders, in particular to a method for modifying the interface of metal powders for 3D printing. Background technique [0002] Since the information age, the emergence of new technologies represented by network technology and digital technology is profoundly changing all aspects of human society. As a strategic emerging industry, 3D printing technology is rapidly changing traditional production methods and lifestyles. All countries in the world attach great importance to and actively promote this technology. Many experts believe that the new manufacturing technology represented by 3D printing technology characterized by digitalization, networking, personalization and customization will promote the third industrial revolution. With the development of science and technology and the needs of popularization and application, the direct manufacture of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14B22F1/02
CPCB22F9/14B22F1/16
Inventor 陈庆曾军堂
Owner 哈特三维(中山)金属材料有限公司