Method for preparing active metal powder for additive manufacturing

A technology for additive manufacturing and powder preparation, which is applied in the preparation process and application field of active metal powder for additive manufacturing, can solve the problems of inclusion, difficult control, material pollution, etc., and achieve the effects of pollution prevention, flexible production and good fluidity

Active Publication Date: 2016-08-24
浙江亚通新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum smelting inert gas atomization technology is a better way to prepare high-quality metal and alloy powders, but traditional gas atomization equipment uses crucibles to hold molten materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] The active metal TC4 is made into a round rod with a diameter of 40mm and a length of 800mm. The head of the rod is processed into a conical shape with a taper angle of 70 degrees. Then it is vertically fixed on the fixture in the atomization chamber. The chamber door is closed, and the melting chamber and The atomization chamber is pre-evacuated, and the vacuum degree reaches 1×10 -4 ~1×10 -2 Pa, then fill with high-purity argon or helium inert gas to avoid material oxidation, keep the chamber pressure at 1atm; use the motor to lower the bar material into the high-frequency induction coil, adjust the bar material speed 80rpm, the induction power of the coil 75kW, make the TC4 bar alloy melt and flow down naturally, at the same time, set the bar feed rate to 3mm / s, open the atomizing nozzle valve, the inert gas pressure is 3.5Mpa, and atomize the alloy liquid flowing down by gravity into fine particles, and Cool to form powder; use a vibrating screen to ...

Example Embodiment

[0021] Example 2

[0022] The active metal AlSi10Mg is made into a round rod with a diameter of 75mm and a length of 600-800mm. The rod head is processed into a conical shape with a taper angle of 35 degrees. Then it is vertically fixed on the fixture in the atomization chamber, and the chamber door is closed. The chamber and the atomizing chamber are pre-evacuated, and the vacuum degree reaches 1×10 -4 ~1×10 -2 Pa, then fill with high-purity argon or helium inert gas to avoid material oxidation, keep the chamber pressure at 1.02atm; use the motor to lower the bar material into the high-frequency induction coil, adjust the bar material speed 40rpm, the induction of the coil The power is 27kW to melt the AlSi10Mg bar alloy and flow down naturally. At the same time, set the bar feed rate to 0.1mm / s, open the atomizing nozzle valve, and the inert gas pressure is 3.5Mpa to atomize the alloy liquid flowing down by gravity into fine particles , And cool to form powder; use a vibrating ...

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Abstract

The invention discloses a method for preparing active metal powder for additive manufacturing, and relates to a non-crucible inert gas atomizing powder preparation technique. The method comprises the following steps of vacuuming a smelting room and an atomizing room; filling argon or helium to protect, and smelting an active alloy bar in the smelting room by a high-frequency induction coil to form a continuous alloy liquid flow; using a high-pressure atomizing spray nozzle to atomize the inert gas by the alloy liquid flow to form powder, performing cyclone separating on the powder, and collecting. The method for preparing the active metal powder for additive manufacturing has the advantages that the technology is advanced, the production is flexible, the contact between the powder and any material is avoided, and the secondary pollution is avoided; the degree of sphericity is good, the content of oxygen is low, the fluidity is good, and the like; the method can meet the use requirements of additive manufacturing technology.

Description

technical field [0001] The invention relates to the field of metal materials, and is particularly suitable for the preparation process and application of active metal powders for additive manufacturing. Background technique [0002] 3D printing (the academic name is additive manufacturing) is a technology that uses CAD data to accumulate material layer by layer to manufacture solid parts. Through a bottom-up material additive manufacturing, it can complete the manufacture of objects of almost any geometric shape. Additive manufacturing can form complex-shaped parts such as free-form surfaces, hollow structures, and porous structures that cannot be formed by traditional manufacturing techniques. It has the advantages of short forming cycle, high manufacturing efficiency, and material saving. An important complement to technology, is now receiving more and more attention. [0003] Metal additive manufacturing is known as the jewel in the crown of the 3D printing industry. It ...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F3/105B33Y70/00
CPCB22F9/082B33Y70/00B22F10/00B22F1/065B22F10/34B22F10/28Y02P10/25
Inventor 刘平顾小龙张腾辉龙郑易崔良丁洪波
Owner 浙江亚通新材料股份有限公司
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