PREPARATION METHOD AND SYSTEM FOR TITANIUM OR TITANIUM ALLOY POWDER HAVING HIGH DEGREE OF SPHERICITY AND LOW OXYGEN INCREMENT - SHANGI INSTITUTE FOR ADVANCED MAT NANJING CO LTD

Title:

PREPARATION METHOD AND SYSTEM FOR TITANIUM OR TITANIUM ALLOY POWDER HAVING HIGH DEGREE OF SPHERICITY AND LOW OXYGEN INCREMENT

Document Type and Number:

WIPO Patent Application WO/2024/000919

Kind Code:

A1

Abstract:

The present invention provides a preparation method and system for titanium or titanium alloy powder having a high degree of sphericity and a low oxygen increment. A high-cleanliness titanium alloy wire material and bar material are used as raw materials; a high-energy plasma heat source heats the wire material under the protection of an inert atmosphere; molten metal droplets drop to an end surface of the high-speed rotating bar material and are thrown out by centrifugal force, and sequentially undergo stages such as a spheroidization stage, a solidification stage, and a cooling stage along a flying track, so that defects such as satellite powder, special-shaped powder, and hollow powder caused by rapid cooling of particles and interference of secondary gas flow are effectively avoided without impact of high-speed jet flow. The whole process of powder preparation and screening post-treatment is performed under the protection of an inert atmosphere, and the powder oxygen increment is effectively limited, thereby facilitating obtaining of the titanium or titanium alloy powder having a high degree of sphericity and a low oxygen increment.

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Inventors:

WANG JIAN (CN)
ZHAO BOSHEN (CN)
REN ZHIHAO (CN)
LI YONGHUA (CN)
ZHANG SHENGBIN (CN)
CHEN XIAOLONG (CN)

Application Number:

PCT/CN2022/124577

Publication Date:

January 04, 2024

Filing Date:

October 11, 2022

Export Citation:

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Assignee:

SHANGI INSTITUTE FOR ADVANCED MAT NANJING CO LTD (CN)

International Classes:

B22F9/14

Foreign References:

CN114226740A	2022-03-25
CN106378460A	2017-02-08
CN105618775A	2016-06-01
JPS6280205A	1987-04-13
CN109676148A	2019-04-26

Attorney, Agent or Firm:

NANJING XING GAO INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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