A kind of plasma preparation method of titanium-based alloy spherical powder

A titanium-based alloy, spherical powder technology, applied in the field of plasma preparation, can solve the problem of not being able to meet the requirements of high-end customers, and achieve the effect of fine grain, less impurities and high sphericity

Inactive Publication Date: 2017-08-15
LONGYAN ZIJIN INNOVATION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the statistics of China Powder Metallurgy Service Network, the amount of spherical powder used is 700-800t; due to the limitation of technical conditions, domestically produced titanium alloy powder is mostly low-end products, which cannot meet the requirements of high-end customers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment 1 provides a plasma preparation method of titanium-based alloy spherical powder, comprising the following steps:

[0033] (1) Sponge titanium is selected as the basic material, and 10% Ni and 10% Cu alloying elements are added to form a ternary alloy;

[0034] (2) Using the vacuum arc melting method, the ternary titanium-based alloy is formed by heating and melting the arc gun. The input current of the arc gun is 20A, and the alloy ingot is turned over 3 times to obtain a completely melted and uniformly mixed alloy;

[0035] (3) The molten ternary titanium-based alloy is sprayed into the copper core with a hollow cylinder by spray casting, and -0.3Pa argon is filled to generate air pressure, mainly by rapid cooling to form a certain amorphous state. Ternary titanium-based alloy;

[0036] (4) Anneal the ternary titanium-based alloy with amorphous presence at a temperature of 300°C for 0.5h to homogenize its composition, control the desired structure, ref...

Embodiment 2

[0042] This embodiment 2 provides a plasma preparation method of titanium-based alloy spherical powder, comprising the following steps:

[0043] (1) Sponge titanium is selected as the basic material, and 25% Ni and 25% Cu alloying elements are added to form a ternary alloy;

[0044] (2) Using the vacuum arc melting method, the ternary titanium-based alloy is formed by heating and melting the arc gun. The input current of the arc gun is 25A, and the alloy ingot is turned over 3 times to ensure complete melting and uniform mixing of the alloy;

[0045] (3) The molten ternary titanium-based alloy is sprayed into the copper core with a hollow cylinder by spray casting, filled with -0.5Pa argon to generate air pressure, and the main method is rapid cooling to form a certain amorphous state. Ternary titanium-based alloy;

[0046] (4) Perform annealing treatment on the ternary titanium-based alloy with amorphous existence at a temperature of 500°C for 5 hours to homogenize its compo...

Embodiment 3

[0052] This embodiment 3 provides a plasma preparation method of titanium-based alloy spherical powder, comprising the following steps:

[0053] (1) Sponge titanium is selected as the basic material, and 20% Ni, 20% Cu, 10% Zr elements are added to form a quaternary alloy;

[0054] (2) Vacuum arc melting method is used to heat and melt the quaternary titanium-based alloy through the arc gun. The input current of the arc gun is 30A, and the alloy ingot is turned over 4 times to ensure the complete melting and uniform mixing of the alloy;

[0055] (3) The molten ternary or quaternary titanium-based alloy is sprayed into a hollow cylindrical copper kun by spray casting, and filled with argon gas of -0.6Pa to generate air pressure. The method is mainly rapid cooling to form a certain Quaternary titanium-based alloys with crystals;

[0056](4) Perform annealing treatment on the quaternary titanium-based alloy with amorphous presence at a temperature of 700°C for 80 minutes to homo...

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Abstract

The invention relates to a plasma preparation method of titanium-based alloy spherical powder, which comprises the following steps: (1) using titanium sponge as a material, adding Ni, Cu, and Zr alloy elements to form a ternary or quaternary alloy; (2) passing an electric arc The gun is heated and melted to form a ternary or quaternary titanium-based mixed alloy; (3) Spray the mixed alloy into a hollow copper kun with a cylinder; (4) Annealing treatment; (5) Crushing the cylindrical alloy; (6) Establish a plasma torch with high energy density and high heating intensity; (7) Feed the raw material into the high temperature zone of the core of the plasma torch, and the titanium-based alloy powder raw material absorbs heat and melts rapidly; (8) Rapidly cools and solidifies to form a spherical The titanium-based alloy powder particles are collected by a powder collection device. The invention expands the application range of raw materials, and the formed spherical powder has fine grains, uniform structure, good plasticity, high strength and hardness, and can be used for thermal spraying and 3D printing.

Description

technical field [0001] The invention relates to a plasma preparation method of titanium-based alloy spherical powder, belonging to the technical field of metal powder preparation. Background technique [0002] Traditional alloying has improved the performance of existing titanium alloys (specific strength, specific stiffness, fatigue resistance, wear resistance, heat resistance, corrosion resistance) to a certain limit, thus limiting the application range of titanium alloys. With the development of contemporary high technology and the continuous expansion of the application field of titanium-based alloys, the performance requirements for titanium-based alloys are not limited to a single high-performance index, but require them to have excellent comprehensive performance under complex service conditions. It is expected that it can have a series of excellent properties such as high specific modulus, high specific strength, creep resistance, dimensional stability and wear resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00B22F9/14
CPCC22C14/00B22F9/14B22F2998/10B22F1/065C22C1/11C22F1/183B22F9/04
Inventor 陈海霞刘志光刘少存吴鹏
Owner LONGYAN ZIJIN INNOVATION RES INST
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