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Preparation method of titanium alloy TA7 titanium alloy powder

A powder preparation and titanium alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of restricting the application of TA7 alloy, insufficient vacuum degree, poor control effect of powder oxygen content, etc., and achieve the elimination of coarse and uneven tissue Organization, good sphericity, ensure the effect of correctness and uniformity

Inactive Publication Date: 2018-04-03
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional powder preparation methods mainly include gas atomization method, etc. Due to problems such as the purity of the production atmosphere and insufficient vacuum, the powder is easily compatible with oxygen during the forming process, resulting in poor control of the oxygen content of the TA7 titanium alloy powder. Limit the application of TA7 alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing ultra-low oxygen TA7 titanium alloy powder, comprising the following steps:

[0020] Step 1, smelting of TA7 master alloy rod; the alloy composition is carried out according to GB / T3620-2016;

[0021] Step 2, machining the TA7 alloy master alloy billet, the diameter of the processed electrode rod is 90mm, the length is 1000mm, and the straightness deviation of the electrode rod is controlled at 0.1mm / m;

[0022] Step 3, place the TA7 alloy electrode rod in a closed reaction chamber containing helium and rotate it at high speed, and use a plasma gun to heat the end of the electrode rod to melt it;

[0023] Step 4, the molten metal of the electrode rod in step 3 is atomized and flies out under the action of centrifugal force to form fine liquid droplets, which are rapidly cooled in He gas to form spherical particles, which fall into the collection container at the bottom of the atomization chamber to obtain TA7 alloy spherical powder;

[0024] The...

Embodiment 2

[0027] A method for preparing ultra-low oxygen TA7 titanium alloy powder, comprising the following steps:

[0028] Step 1, smelting of TA7 master alloy rod; the alloy composition is carried out according to GB / T3620-2016;

[0029] Step 2: Machining the TA7 alloy master alloy billet, the diameter of the electrode rod after processing is 45mm, the length is 550mm, and the straightness deviation of the electrode rod is controlled at 0.05mm / m;

[0030] Step 3, place the TA7 alloy electrode rod in a closed reaction chamber containing an inert gas containing argon and rotate it at high speed, and use a plasma gun to heat the end of the electrode rod to melt it;

[0031] Step 4, the molten metal of the electrode rod in step 3 is atomized and flies out under the action of centrifugal force to form fine droplets. The droplets are rapidly cooled in He+Ar gas to form spherical particles and fall into the collection container at the bottom of the atomization chamber. Obtain TA7 alloy sph...

Embodiment 3

[0035] A method for preparing ultra-low oxygen TA7 titanium alloy powder, comprising the following steps:

[0036] Step 1, smelting of TA7 master alloy rod; the alloy composition is carried out according to GB / T3620-2016;

[0037] Step 2, machining the TA7 alloy master alloy billet, the diameter of the electrode rod after processing is 10mm, the length is 100mm, and the deviation of the straightness of the electrode rod is controlled at 0.01mm / m;

[0038] Step 3, place the TA7 alloy electrode rod in a closed reaction chamber with inert gas argon and rotate it at high speed, and use a plasma gun to heat the end of the electrode rod to melt it;

[0039] Step 4, the molten metal of the electrode rod in step 3 is atomized and flies out under the action of centrifugal force to form fine droplets, which are quickly cooled in Ar gas to form spherical particles, which fall into the collection container at the bottom of the atomization chamber to obtain TA7 Alloy spherical powder;

...

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Abstract

The invention discloses a preparation method of titanium alloy TA7 titanium alloy powder. The preparation method comprises the steps that step 1, smelting of a TA7 master alloy bar is carried out; step 2, the diameter of an electrode bar processed through the TA7 alloy bar is 10 mm to 90 mm, and the length of the electrode bar is 100 mm to 1000 mm; step 3, the electrode bar is placed in a reactionchamber with an inert gas and is rotated at a high speed, the end part of the electrode bar is heated through a plasma gun with the power of 100 kW to 300 kW, and the end part of the electrode bar ismolten; and step 4, after atomization, a molten metal flies out under the action of centrifugal force, fine liquid drops are formed, the liquid drops form spherical particles after being quickly cooled in a protective gas, the spherical particles fall into a collector at the bottom of an atomization chamber, and the TA7 alloy spherical powder is obtained. The TA7 alloy spherical powder prepared through the method has the characteristic that the oxygen enrichment amount is extremely low.

Description

technical field [0001] The invention belongs to the technical field of alloy spherical powder preparation and designs a method for preparing ultra-low oxygen TA7 titanium alloy powder. Background technique [0002] As structural metals, titanium and titanium alloys have a series of outstanding advantages such as high specific strength, good corrosion resistance, high temperature resistance, etc., and can be processed by various methods of pressure forming, welding and machining. With the development of titanium alloy research and production, it is widely used in aerospace and other fields, such as key parts such as turbine engines and aircraft frames. [0003] Referred to as TA7 alloy, it has the characteristics of good toughness, high strength, and small notch sensitivity at low temperatures. As an engineering material that can be used under low temperature (liquid hydrogen) conditions, it has been widely used in the aerospace field and has become a low-temperature vessel f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/14
CPCB22F9/14B22F1/065
Inventor 闫飞韩志宇陈小林王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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