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Method for manufacturing micro-fine spherical titanium powder

A powder and spherical technology, applied in the field of fine spherical titanium powder manufacturing, can solve the problems of high production efficiency, high cost, high oxygen content, etc., and achieve the effect of low cost, less production process and low oxygen content

Active Publication Date: 2013-12-11
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a manufacturing method of fine spherical titanium powder, which solves the problems of high cost and high oxygen content in the preparation of fine spherical titanium powder with particle size less than 45um in the prior art, high production efficiency, and is suitable for industrial production

Method used

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  • Method for manufacturing micro-fine spherical titanium powder
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Examples

Experimental program
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Effect test

Embodiment 1

[0037]Using sponge titanium as raw material, mix sponge titanium with hydrogen, keep the positive pressure of hydrogen at 0.05MPa, keep warm at 650°C, and crush the hydrogenated sponge titanium with a jet mill. The speed of the jet mill is controlled at 1000r / min, and the particle size is obtained by crushing. Titanium hydride powder less than 45um; titanium hydride powder with an average particle size of 17um is selected, and radio frequency plasma is used for dehydrogenation and spheroidization; the output power of radio frequency plasma is 60kw; both shielding gas and working gas use argon, shielding gas The flow rate is selected at 0.7m 3 / h, the working gas flow rate is selected at 0.4m 3 / h, and then use argon as the carrier gas to transport the titanium hydride powder to the center of the plasma torch, the powder feeding rate is selected at 30g / min, the titanium hydride powder is heated and melted into a spherical shape by the plasma torch during the falling process, an...

Embodiment 2

[0040] Using sponge titanium as raw material, mix sponge titanium with hydrogen, keep the positive pressure of hydrogen at 0.1MPa, keep warm at 730°C, and crush the hydrogenated sponge titanium with a jet mill. The speed of the jet mill is controlled at 1300r / min, and the particle size is obtained by crushing. Titanium hydride powder less than 45um; titanium hydride powder with an average particle size of 45um is selected, and radio frequency plasma is used for dehydrogenation and spheroidization; the output power of radio frequency plasma is 85kw; both protective gas and working gas use argon, protective gas The flow rate is selected at 1.5m 3 / h, the working gas flow rate is selected at 1.0m 3 / h, and then use argon as the carrier gas to transport the titanium hydride powder to the center of the plasma torch, the powder feeding rate is selected at 300g / min, the titanium hydride powder is heated and melted into a spherical shape by the plasma torch during the falling process,...

Embodiment 3

[0043] Using sponge titanium as the raw material, mix the sponge titanium with hydrogen, keep the positive pressure of hydrogen at 0.08MPa, keep it warm at 7300°C, and crush the hydrogenated sponge titanium with a jet mill. The speed of the jet mill is controlled at 1150r / min, and the particle size is obtained by crushing. Titanium hydride powder less than 45um; titanium hydride powder with an average particle size of 36um is selected, and radio frequency plasma is used for dehydrogenation and spheroidization; the output power of radio frequency plasma is 70kw; both protective gas and working gas use argon, protective gas The flow rate is selected at 1.0m 3 / h, the working gas flow rate is selected at 10.7m 3 / h, and then use argon as the carrier gas to transport the titanium hydride powder to the center of the plasma torch, the powder feeding rate is selected at 100g / min, the titanium hydride powder is heated and melted into a spherical shape by the plasma torch during the fa...

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Abstract

The invention discloses a method for manufacturing micro-fine spherical titanium powder, which includes the steps: using sponge titanium as raw materials, mixing the sponge titanium with hydrogen, holding the positive pressure of the hydrogen at 0.05-0.1MPa, preserving heat at the temperature of 650-730 DEG C, and cooling after ensuring the sponge titanium and the hydrogen to sufficiently react; crushing the hydrogenated sponge titanium with an air-stream mill, controlling the revolving speed of the air-stream mill within 1000r / min-1300r / min, and obtaining titanium hydride powder with a grain size smaller than 45 micrometers by means of crushing; and dehydrogenizing and balling the titanium hydride powder by using radio frequency plasma. The method for manufacturing the micro-fine spherical titanium powder has the advantages that the grain size of the powder and grain size distribution can be effectively controlled, and the powder is low in oxygen content, few in production procedure, low in cost, high in balling rate, fine in sphericility and suitable for industrialized popularization.

Description

technical field [0001] The invention belongs to the technical field of powder preparation technology, and relates to a method for manufacturing fine spherical titanium powder. Background technique [0002] Titanium and titanium alloys are high-quality structural materials with low density, high specific strength, good heat resistance and corrosion resistance. They are widely used in the fields of automobile, chemical industry, metallurgy, environmental protection, aviation, aerospace and weapons. Powder metallurgy is one of the important means to produce titanium and titanium alloy bulk products and parts, which has the characteristics of fine structure, controllable composition and structure. However, in the titanium powder metallurgy industry, it is very critical to prepare titanium powder with uniform composition, uniform density, few defects, high strength and high sphericity. At the same time, due to the high activity and easy pollution of titanium metal, the difficult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04
Inventor 吴引江段庆文梁永仁杨团委尤超郭晓梅
Owner WESTERN BAODE TECH CO LTD
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