Low-tungsten-carbide-adjacency hard alloy and preparing method thereof

A cemented carbide and tungsten carbide adjacent technology, which is applied in the field of low tungsten carbide adjacent cemented carbide and its preparation, can solve the problems of reduced toughness of cemented carbide and increased WC/WC adjacent degree, etc.
CN111286662AActive Publication Date: 2020-06-16SHAANXI SCI TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI SCI TECH UNIV
Publication Date
2020-06-16

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Abstract

The invention provides a low-tungsten-carbide-adjacency hard alloy and a preparing method thereof, and belongs to the technical field of tungsten alloy preparation. The preparing method includes the following steps of sequentially performing balling treatment and screening treatment on tungsten carbide powder to obtain screened powder, spray-coating the surface of the screened powder with a cobaltfilm to obtain cobalt film and tungsten carbide composite powder, mixing the cobalt film and tungsten carbide composite powder with tantalum carbide powder, performing interface diffusion heat treatment under the stirring condition to obtain precursor powder, and performing selected laser sintering on the precursor powder to obtain the low-tungsten-carbide-adjacency hard alloy. The hard alloy prepared through the method has the low tungsten carbide adjacency, the excellent mechanical properties, the tungsten carbide adjacency of lower than or equal to 4.3%, the microhardness of higher than orequal to 14.5 GPa, the bending strength of higher than or equal to 2550 MPa and the breaking tenacity of higher than or equal to 11.3 MPa.m[1 / 2].
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Description

technical field

[0001] The invention relates to the technical field of tungsten alloy preparation, in particular to a cemented carbide with low tungsten carbide contiguity and a preparation method thereof. Background technique

[0002] Co element is an important binder phase of YG cemented carbide, which is used to increase the toughness of cemented carbide. The uniform distribution of Co at the WC / WC interface is the key to improving the toughness of cemented carbide. If the distribution of Co is uneven, it is easy to increase the adjacency of WC / WC, which in turn leads to a decrease in the toughness of cemented carbide. Therefore, how to reduce the adjacency of tungsten carbide to reduce the brittleness of cemented carbide, improve its toughness, and make it have good mechanical properties is a technical problem that needs to be solved urgently. Contents of the invention

[0003] The object of the present invention is to provide a cemented carbide with low tungsten carb...

Claims

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