Title:
SI-CONTAINING HIGH-STRENGTH LOW-MODULUS MEDICAL TITANIUM ALLOY, ADDITIVE MANUFACTURING METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/139334
Kind Code:
A1
Abstract:
Disclosed are a Si-containing high-strength low-modulus medical titanium alloy, an additive manufacturing method therefor and a use thereof. The preparation method comprises alloy component designing, powder making, model building and substrate preheating, and additive manufacturing forming, wherein the Si-containing high-strength low-modulus medical titanium alloy is designed to comprise the following components: 60-70 at.% of Ti, 16-24 at.% of Nb, 4-14 at.% of Zr, 1-8 at.% of Ta, and 0.1-5 at.% of Si. The principles behind the present invention lie in designing a high-strength low-modulus biologically compatible medical β-type titanium alloy on the basis of the d-electron theory, reducing a thermal expansion difference between silicide and the β-Ti phase by means of preheating, and also ensuring, during the process of additive manufacturing, a sufficient cooling degree that facilitates transition of the alloy from divorced eutectic to desolvation reaction. The present invention solves the general problems of deteriorated mechanical performances due to continuous distribution of a Si-containing phase along a grain boundary and proneness to cracking due to a difference in thermal expansion coefficient of different phases.
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Inventors:
LI YUANYUAN (CN)
YANG CHAO (CN)
LUO XUAN (CN)
LI DONGDONG (CN)
QIN YANGUO (CN)
LI NING (CN)
YANG CHAO (CN)
LUO XUAN (CN)
LI DONGDONG (CN)
QIN YANGUO (CN)
LI NING (CN)
Application Number:
PCT/CN2020/124598
Publication Date:
July 15, 2021
Filing Date:
October 29, 2020
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
UNIV HUAZHONG SCIENCE TECH (CN)
UNIV JILIN (CN)
UNIV HUAZHONG SCIENCE TECH (CN)
UNIV JILIN (CN)
International Classes:
C22C14/00; A61L27/02; A61L27/06; A61L27/50; A61L27/54; B22F1/00; B22F3/105; B22F9/08; B22F9/14; B33Y10/00; B33Y70/00; C22C1/04
Domestic Patent References:
| WO2017048199A1 | 2017-03-23 |
Foreign References:
| CN109926582A | 2019-06-25 | |||
| CN107034383A | 2017-08-11 | |||
| CN101899592A | 2010-12-01 | |||
| CN109332698A | 2019-02-15 | |||
| CN111118339A | 2020-05-08 |
Other References:
LI, YUHUA: "Composition Design, Formation Mechanism and Microstructure and Property of Biomedical Ultrafine Grained Titanium Alloys with High Performance", CHINA DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, ENGINEERING SCIENCE & TECHNOLOGY I) (MONTHLY), 15 February 2017 (2017-02-15), pages 1 - 189, XP055827181
Attorney, Agent or Firm:
GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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