Preparation method of spherical titanium and nickel shape memory alloy for 3D (three-dimensional) printing

A memory alloy and 3D printing technology, applied in the field of 3D printing, can solve the problems of uneven distribution of elements and low powder sphericity, and achieve the effect of low non-metallic inclusion content, high powder sphericity, and ensuring consistency and uniformity.

Active Publication Date: 2017-06-13
中航迈特增材科技(北京)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing spherical titanium-nickel shape memory alloy powder for 3D printing, which solves the problems of low powder sphericity and uneven distribution of elements

Method used

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  • Preparation method of spherical titanium and nickel shape memory alloy for 3D (three-dimensional) printing
  • Preparation method of spherical titanium and nickel shape memory alloy for 3D (three-dimensional) printing
  • Preparation method of spherical titanium and nickel shape memory alloy for 3D (three-dimensional) printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Process the titanium-nickel alloy into an electrode rod with a diameter of 50mm and a length of 600mm and install it on the feeding device, vacuumize the entire atomization device and fill it with argon protective gas; the electrode rod rotates at a speed of 140r / min and 80mm / min The falling speed of the rod enters the lower conical coil, and the tip of the bar is gradually melted by induction heating in the conical coil to form a melt flow. Under the action of gravity, the melt flow directly flows into the atomizer below the conical coil, and the high-pressure argon The gas enters the annular slit atomizer through the gas pipeline, and interacts with the metal liquid flow under the gas outlet. The liquid flow is broken into small droplets by the action of high-pressure gas, and the atomizing gas pressure is 3.5MPa. During the flight in the atomization chamber, the liquid droplets are spheroidized and solidified into metal powder by their own surface tension.

[0026] T...

Embodiment 2

[0028] The titanium-nickel master alloy with a diameter of 30mm and a length of 1000mm is used as the electrode rod. The electrode rod enters the lower conical coil at a rotation speed of 200rpm and a descending speed of 150mm / min. The tip of the rod is gradually melted by induction heating in the conical coil. The melt flow is formed, and under the action of gravity, the melt flow directly flows into the atomizer below the conical coil, and the high-pressure argon gas enters the atomizer through the gas pipeline, interacts with the metal liquid flow under the gas outlet, and passes through the high-pressure The gas action breaks the liquid flow into small droplets, and the atomization pressure is 3MPa. During the flight in the atomization chamber, the liquid droplets are spheroidized and solidified into metal powder by their own surface tension.

[0029] The particle shape of titanium-nickel powder prepared by electrode-induced gas atomization is spherical or nearly spherical...

Embodiment 3

[0031] The titanium-nickel master alloy with a diameter of 70mm and a length of 400mm is used as the electrode rod. The electrode rod enters the lower conical coil at a rotation speed of 50r / min and a descending speed of 40mm / min. The tip of the rod is heated by induction in the conical coil. Gradually melt to form a melt flow, and under the action of gravity, the melt flow directly flows into the atomizer below the conical coil, and the high-pressure argon enters the atomizer through the gas pipeline, and interacts with the metal flow under the gas outlet, The liquid flow is broken into small droplets by the action of high-pressure gas, and the atomization pressure is 4.5MPa. During the flight in the atomization chamber, the liquid droplets are spheroidized and solidified into metal powder by their own surface tension.

[0032] The particle shape of titanium-nickel powder prepared by electrode-induced gas atomization is spherical or nearly spherical, and there is basically no...

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Abstract

The invention discloses a preparation method of spherical titanium and nickel shape memory alloy for 3D (three-dimensional) printing, and belongs to the technical field of 3D printing. The method includes the steps: taking titanium and nickel alloy bars as induction electrodes under the vacuum states or the protection states of inert gas, and rotating downwards electrode bars to enter conical coils; gradually melting top ends of the bars in the conical coils under the action of induction heating in the moving process to form molten drop or molten fluid flow, enabling the molten drop or the molten fluid flow to directly flow into an atomizer below the conical coils under the action of gravity; crushing the molten drop or the molten fluid flow into small droplets under the action of high-pressure gas, and balling and coagulating the small droplets into metal powder through surface tension of the small droplets in the flight process of the small droplets. The preparation method has the advantages that power is high in sphericity degree, components are uniform and nonmetal inclusion is low in content.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, in particular to a method for preparing spherical titanium-nickel shape memory alloy powder for 3D printing. Background technique [0002] Titanium-nickel shape memory alloy has become a new type of functional material that has attracted much attention due to its specific shape memory effect, superelasticity, high damping, high corrosion resistance, and excellent biocompatibility. However, the high melting point, high activity and poor machinability of titanium-nickel alloys seriously restrict the performance improvement and application of the alloy. [0003] 3D printing, as a computer-aided precision manufacturing technology, realizes near-net shape from metal powder raw materials to complex structures through computational simulation and continuous stacking. The emergence of this technology has opened up a new way for the preparation of titanium-nickel memory alloy structural parts with co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00
CPCB22F9/082B22F2009/0836B22F1/065
Inventor 张鹏高鑫高正江张飞马腾张建李建群
Owner 中航迈特增材科技(北京)有限公司
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