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A vacuum induction melting gas atomization preparation method of titanium and titanium alloy spherical powder

A technology of vacuum induction melting and spherical powder, applied in the field of powder metallurgy, can solve the problems of increasing carbon content of finished powder and affecting the comprehensive performance of powder, and achieve the effect of reducing powder carbonization rate, reducing interstitial element content and good sphericity

Active Publication Date: 2017-03-08
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a common problem in the process of gas atomization using a graphite guide tube, that is, when the molten metal flows through the inside of the guide tube at high temperature, it is easy to react with graphite and carbonize, which will eventually lead to the carbon content of the finished powder. A large increase (carbon content> 0.02wt.%), which will seriously affect the overall performance of the powder, the impact is particularly obvious for titanium and titanium alloy powder
However, in the existing research on aerosolization technology, no report has proposed effective measures or means to control the content of interstitial elements (such as carbon content) in aerosolized powders.

Method used

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  • A vacuum induction melting gas atomization preparation method of titanium and titanium alloy spherical powder
  • A vacuum induction melting gas atomization preparation method of titanium and titanium alloy spherical powder

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Effect test

Embodiment 1

[0031] The product to be prepared in this embodiment is TC4 titanium alloy spherical powder. combine figure 1 and figure 2 In this embodiment, the vacuum induction melting gas atomization preparation method of TC4 titanium alloy spherical powder comprises the following steps:

[0032] Step 1. Mix the first ceramic powder and absolute ethanol uniformly at a mass ratio of 1:0.05 to obtain an anti-carbonization coating, then apply the anti-carbonization coating evenly on the upper part of the inner wall of the graphite draft tube 5, and dry naturally to obtain Anti-carbonization coating 6; the first ceramic powder is Y 2 o 3 pink;

[0033] Step 2: Use the diversion inner core 7 to protect the part of the inner wall of the graphite diversion tube 5 that is not coated with the anti-carbonization coating 6, and the specific process is as follows:

[0034] Step 201, designing and making a mold according to the shape and size of the part not coated with the anti-carbonization co...

Embodiment 2

[0040] The product to be prepared in this embodiment is Ti600 titanium alloy spherical powder. combine figure 1 and figure 2 In this embodiment, the vacuum induction melting gas atomization preparation method of Ti600 titanium alloy spherical powder comprises the following steps:

[0041] Step 1. Mix the first ceramic powder and absolute ethanol uniformly in a mass ratio of 1:0.04 to obtain an anti-carbonization coating, and then uniformly coat the anti-carbonization coating on the upper part of the inner wall of the graphite draft tube 5, and obtain an anti-carbonization coating after drying. Carbonized coating 6; the first ceramic powder is Y 2 o 3 pink;

[0042] Step 2: Use the diversion inner core 7 to protect the part of the inner wall of the graphite diversion tube 5 that is not coated with the anti-carbonization coating 6, and the specific process is as follows:

[0043] Step 201, designing and making a mold according to the shape and size of the part not coated w...

Embodiment 3

[0049] The product to be prepared in this embodiment is pure titanium spherical powder. combine figure 1 and figure 2 The vacuum induction melting gas atomization preparation method of the pure titanium spherical powder in this embodiment comprises the following steps:

[0050] combine figure 1 and figure 2 In this embodiment, the vacuum induction melting gas atomization preparation method of titanium and titanium alloy spherical powder comprises the following steps:

[0051] Step 1. Mix the first ceramic powder and absolute ethanol uniformly in a mass ratio of 1:0.06 to obtain an anti-carbonization coating, then apply the anti-carbonization coating evenly on the upper part of the inner wall of the graphite draft tube 5, and obtain an anti-carbonization coating after drying. Carbonized coating 6; the first ceramic powder is ZrO 2 pink;

[0052] Step 2: Use the diversion inner core 7 to protect the part of the inner wall of the graphite diversion tube 5 that is not coat...

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Abstract

The invention provides a preparation method of titanium and titanium alloy spherical powder by vacuum induction melting gas atomization. The preparation method comprises the following steps: I, uniformly mixing first ceramic powder with absolute ethyl alcohol at a certain mass ratio so as to obtain an anti-carbonization coating, then uniformly coating the upper part of the inner wall of a graphite guide pipe with the anti-carbonization coating, and drying to obtain an anti-carbonization coating layer; II, protecting the part, not coated with the anti-carbonization coating layer, in the inner wall of the graphite guide pipe by adopting a guide inner core; III, loading the graphite guide pipe into a melting chamber, adding titanium or titanium alloy raw materials into a water cooled copper crucible for vacuum induction melting gas atomization treatment, so as to obtain the titanium or titanium alloy spherical powder. According to the preparation method of titanium and titanium alloy spherical powder by vacuum induction melting gas atomization, provided by the invention, the operational process is simple, the production efficiency is high, continuous gas atomization is achieved, the prepared titanium and titanium alloy spherical powder is reduced in risk of being polluted, the recarburizing rate of the powder is effectively decreased by at least 50%, and the requirement of industrial production for high-quality spherical titanium and titanium alloy powder is met.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a vacuum induction melting gas atomization preparation method of titanium and titanium alloy spherical powder. Background technique [0002] Spherical titanium and titanium alloy powders are important basic raw materials for high-performance powder metallurgy titanium and titanium alloy near-net shape manufacturing and processing because of their good fluidity, less pore inclusions, and low impurity content. Aeronautical engine parts, supercharged TiAl turbines for automobiles, titanium alloy products for medical implants, etc., new rapid prototyping equipment and process technologies (laser rapid manufacturing, electron beam selective melting technology) represented by 3D printing technology The demand for titanium and titanium alloy powder has grown exponentially. [0003] Spherical titanium and titanium alloy powders prepared by vacuum induction melting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
Inventor 陈刚谈萍赵少阳王建贺卫卫刘晓青贾亮
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH