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Title:
METHOD FOR PREPARING COBALT-COATED NANOMETER WC CRYSTAL COMPOSITE POWDER AND ULTRA-FINE GRAIN CEMENTED CARBIDE
Document Type and Number:
WIPO Patent Application WO/2015/161732
Kind Code:
A1
Abstract:
A method for preparing cobalt-coated nanometer WC crystal composite powder comprises the following steps: (1) mixing raw materials with water to obtain a tungsten-cobalt composite saline solution, wherein the raw materials comprise the following components (by weight percentage), 40%-60% of violet tungsten oxide, 30%-52% of water-soluble cobalt salt, 4%-10% of carbon source, 1%-4% of PEG and 0.05%-3% of dispersant agent; (2) drying the tungsten-cobalt composite saline solution obtained in the step (1) to obtain cobalt-coated precursor powder; (3) reducing and carbonizing the cobalt-coated precursor powder obtained in the step (2) in reducing atmosphere to obtain the cobalt-coated nanometer WC crystal composite powder. The cobalt-coated nanometer WC crystal composite powder prepared by the method has stable performance, homogeneous component and fine WC grain size, and the components of the powder can be easily controlled.

Inventors:
TAN XINGLONG (CN)
DENG JUNWANG (CN)
WANG YANYAN (CN)
LI LI (CN)
Application Number:
PCT/CN2015/075305
Publication Date:
October 29, 2015
Filing Date:
March 27, 2015
Export Citation:
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Assignee:
ADVANCED CORP FOR MATERIALS & EQUIPMENTS (CN)
International Classes:
B22F9/24; B22F1/00; C22C1/05; C22C29/08
Domestic Patent References:
WO2009001929A12008-12-31
WO1998024576A11998-06-11
Foreign References:
CN103909274A2014-07-09
CN103056381A2013-04-24
CN102310199A2012-01-11
CN101811195A2010-08-25
CN102198514A2011-09-28
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
北京路浩知识产权代理有限公司 (CN)
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