Preparation method of spherical TiTa alloy powder

A technology of alloy powder and alloy powder, which is applied in the field of preparation of spherical TiTa alloy powder, can solve the problems of increased production cost, low powder purity, and susceptibility to pollution, and achieve the effects of saving raw materials, reducing the number of smelting times, and reducing the risk of pollution

Active Publication Date: 2017-05-31
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the Ti-Ta binary complete solid-solution alloy with high melting point difference and high density difference, this technology involves multiple (5-6) repeated smelting of the bar, and a peeling treatment is required for each smelting , the waste of raw materials is huge, the loss rate of raw materials reaches 40%, and the production cost increases by 1.5 times
Moreover, the raw materials are easily polluted in the intermediate process of repeated smelting, which causes the problems of low purity and high oxygen content in the produced powder
In addition, volatilization of titanium and stratification between elements are very easy to occur during smelting, which easily leads to composition segregation, and the uniformity of alloy ingot smelting directly affects the tissue composition and particle size distribution of plasma rotating electrode atomization powder

Method used

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  • Preparation method of spherical TiTa alloy powder
  • Preparation method of spherical TiTa alloy powder
  • Preparation method of spherical TiTa alloy powder

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The method for preparing spherical Ti-65Ta alloy powder in this embodiment comprises the following steps:

[0029] Step 1, place Ti powder and Ta powder in a mixer and mix to obtain mixed powder; the speed of the mixer is 90r / min, and the mixing time of the mixer is 15h, and the mixer The weight ratio of the steel ball to the mixed powder is 3:1; the mixer is a V-shaped mixer; the mass percentage of Ta in the mixed powder is 65%, and the amount of Ti in the mixed powder The mass percentage is 35%.

[0030] Step 2. Put the mixed powder described in step 1 into a compacting mold, and press it into a billet by cold isostatic pressing, and the pressing pressure of the cold isostatic pressing is 190 MPa;

[0031] Step 3. Place the pressed green compact in step 2 in a vacuum sintering furnace at a vacuum degree of not less than 3.2×10 - 2 Pre-sintering treatment is carried out under the condition of Pa, the temperature of the pre-sintering treatment is 1570°C, and the time...

Embodiment 2

[0038] The method for preparing spherical Ti-40Ta alloy powder in this embodiment comprises the following steps:

[0039]Step 1. Put Ti powder and Ta powder in a mixer and mix to obtain mixed powder; the speed of the mixer is 80r / min, and the mixing time of the mixer is 12h, and the mixer The weight ratio of the steel ball to the mixed powder is 2:1; the mixer is a V-shaped mixer; the mass percentage of Ta in the mixed powder is 40%, and the amount of Ti in the mixed powder The mass percentage is 60%.

[0040] Step 2, put the mixed powder described in step 1 into a compacting mold, and press it into a billet with cold isostatic pressing, and the pressing pressure of the cold isostatic pressing is 160MPa;

[0041] Step 3. Place the compact compacted in step 2 in a vacuum sintering furnace at a vacuum degree of not less than 3.0×10 - 2 Pre-sintering treatment is carried out under the condition of Pa, the temperature of the pre-sintering treatment is 1500°C, and the time of th...

Embodiment 3

[0048] The method for preparing spherical Ti-80Ta alloy powder in this embodiment comprises the following steps:

[0049] Step 1. Put Ti powder and Ta powder in a mixer and mix to obtain mixed powder; the speed of the mixer is 120r / min, and the mixing time of the mixer is 18h, and the mixer The weight ratio of the middle steel ball to the mixed powder is 4:1; the mixer is a V-shaped mixer; the mass percentage of Ta in the mixed powder is 80%, and the amount of Ti in the mixed powder The mass percentage is 20%.

[0050] Step 2, the mixed powder described in step 1 is packed into a pressing mold, and pressed into a billet by cold isostatic pressing, and the pressing pressure of the cold isostatic pressing is 200MPa;

[0051] Step 3. Place the compact compacted in step 2 in a vacuum sintering furnace at a vacuum degree of not less than 2.0×10 - 2 Pre-sintering treatment is carried out under the condition of Pa, the temperature of the pre-sintering treatment is 1600°C, and the ...

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Abstract

The invention discloses a preparation method of spherical TiTa alloy powder. The preparation method comprises the following steps: 1, mixing Ti powder and Ta powder in a material mixing machine to obtain mixed powder; 2, pressing the mixed powder to prepare a blank; 3, pre-sintering the pressed blank; 4, putting the pressed blank into a vacuum consumable electrode electric arc furnace for smelting to obtain a sheared billet; 5, carrying out forging peeling, perforation and tapping, and machining an alloy rod finished product for atomization powdering of a plasma rotary electrode; and 6, preparing the spherical TiTa alloy powder from the alloy rod finished product in the step 5 through a plasma rotary electrode atomization process. The preparation method is simple in operation process and high in production efficiency; the pollution risk to the prepared TiTa alloy powder is reduced, and the oxygen content is less than or equal to 0.1 percent by weight; the raw materials are saved by at least 30 percent or above; the manufacturing cost of the spherical TiTa alloy powder can be effectively reduced by 50 percent; and therefore, low-cost and large-scale production of the high-quality spherical TiTa alloy powder can be met.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy preparation, and in particular relates to a preparation method of spherical TiTa alloy powder. Background technique [0002] Compared with traditional biomedical alloys such as TC4 and NiTi, TiTa alloy has become the most ideal biomedical implant material because of its better biocompatibility, excellent corrosion resistance, and low elastic modulus. One and the demand is growing rapidly. At the same time, with the rapid development of 3D printing technology (laser rapid manufacturing, electron beam selective melting technology), high-performance spherical titanium-tantalum alloy powders with good fluidity, less pore inclusions, and low impurity content will become 3D printed biomedical implants. It is expected to be more widely used as an important basic raw material. [0003] Plasma rotating electrode atomization powder making technology is one of the main methods for preparing spher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14C22C14/00C22C27/02
CPCC22C14/00C22C27/02B22F9/14B22F1/065
Inventor 陈刚赵少阳李增峰汤慧萍殷京瓯葛渊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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