Title:
HIGH-PERFORMANCE TUNGSTEN ALLOY BAR AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/174607
Kind Code:
A1
Abstract:
A high-performance tungsten alloy bar and a preparation method therefor. The bar comprises the following components in percentage by mass: 90-95% of tungsten, 3.5-7% of nickel, 1.5-3% of iron and the balance of inevitable impurities. The preparation method for the bar comprises: respectively weighing tungsten powder, nickel powder and iron powder according to the component proportions of the bar, and mixing same to obtain a composite powder; and then adding a binding agent into the composite powder for a mixing treatment, and sequentially carrying out an extrusion forming treatment, a degumming treatment, a sintering treatment, a heat treatment after sintering and a precision forging deformation treatment to obtain a tungsten alloy bar, wherein the total deformation amount of the precision forging deformation treatment is 20-60%. The preparation method is easy in terms of operation and can achieve low-temperature forging; and the prepared tungsten alloy bar has uniform performances, a room-temperature tensile strength of greater than or equal to 1350 MPa, a yield strength of greater than or equal to 1250 MPa, and an elongation after fracture of greater than or equal to 12%.
Inventors:
WU CHAOSHENG (CN)
SU WENGUO (CN)
LIU JUNHAI (CN)
QI YINGGUO (CN)
WANG LING (CN)
SU WENGUO (CN)
LIU JUNHAI (CN)
QI YINGGUO (CN)
WANG LING (CN)
Application Number:
PCT/CN2021/125233
Publication Date:
August 25, 2022
Filing Date:
October 21, 2021
Export Citation:
Assignee:
ADVANCED TECH & MATERIALS CO LTD (CN)
ATTL BEIJING ADVANCED MAT CO LTD (CN)
ATTL ADVANCED MAT CO LTD (CN)
ATTL BEIJING ADVANCED MAT CO LTD (CN)
ATTL ADVANCED MAT CO LTD (CN)
International Classes:
C22C27/04; B21C37/04; B21J5/00; B22F3/10; B22F3/20; B22F5/00
Foreign References:
| CN108315624A | 2018-07-24 | |||
| CN112570710A | 2021-03-30 | |||
| CN102787249A | 2012-11-21 | |||
| CN103866147A | 2014-06-18 | |||
| CN106148745A | 2016-11-23 | |||
| US3979234A | 1976-09-07 | |||
| US20140308536A1 | 2014-10-16 | |||
| CN109306420A | 2019-02-05 |
Other References:
SHI HONG-GANG, QI ZHI-WANG, SHANG FU-JUN, TIAN KAI-WEN: "Microstructure,mechanical property and recrystallization behavior of swage strengthened tungsten alloy", ORDNANCE MATERIAL SCIENCE AND ENGINEERING, vol. 29, no. 01, 31 January 2006 (2006-01-31), pages 29 - 32, XP055960694, ISSN: 1004-244X
Attorney, Agent or Firm:
BEIJING WUZHOUYANGHE & PARTNERS (CN)
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