Title:
MINING HARD ALLOY FORMULA, MINING HARD ALLOY AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/083249
Kind Code:
A1
Abstract:
Provided is a mining hard alloy formula. The mining hard alloy formula comprises the following components in parts by weight: 87-94 parts of tungsten carbide, 5-12 parts of a cobalt-iron alloy, and 0.1-0.25 parts of chromium carbide. Compared with the prior art, in the present invention, the mining hard alloy has tungsten carbide as a framework, and a cobalt-iron alloy as a binder, such that a binder phase can be uniformly dispersed in the hard alloy, which eliminates the advantages in the alloy and improves the overall hardness, wear resistance and toughness of the hard alloy; moreover, chromium carbide is added as a grain inhibitor and has a good wettability with the binder, such that the dissolving precipitation and abnormal growth of the tungsten carbide during the sintering process are inhibited, the integrity of tungsten carbide grains is ensured, the strength of the bonding phase is enhanced, and the hardness and wear resistance of the alloy are further improved, while the overall strength and toughness of the alloy are not reduced.
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Inventors:
YANG RIPING (CN)
YANG JUN (CN)
YANG XIANGLONG (CN)
YANG JUN (CN)
YANG XIANGLONG (CN)
Application Number:
PCT/CN2021/112415
Publication Date:
April 28, 2022
Filing Date:
August 13, 2021
Export Citation:
Assignee:
CHANGSHA HEIJINGANG IND CO LTD (CN)
International Classes:
C22C29/08; C22C1/05; C22C1/10; E21B10/46
Foreign References:
| CN112359258A | 2021-02-12 | |||
| CN105695836A | 2016-06-22 | |||
| CN109881071A | 2019-06-14 | |||
| JP2020132971A | 2020-08-31 | |||
| JPS5227005A | 1977-03-01 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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