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A kind of cemented carbide that strengthens Co-Ni base binding phase by Si and preparation method thereof

A cemented carbide and binder phase technology, applied in the field of cemented carbide, can solve the problems of easy agglomeration and limited strengthening effect, and achieve the effect of improving the bending strength at room temperature and high temperature, realizing industrialization, and simple and controllable process.

Active Publication Date: 2021-11-30
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And when the binder phase content is low, silicon carbide is only strengthened as hard phase particles, and does not form a solid solution or third phase precipitation strengthening with the binder phase matrix, and the strengthening effect is limited; and in the alloy prepared by this method Silicon carbide is prone to agglomeration in the microstructure

Method used

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  • A kind of cemented carbide that strengthens Co-Ni base binding phase by Si and preparation method thereof
  • A kind of cemented carbide that strengthens Co-Ni base binding phase by Si and preparation method thereof
  • A kind of cemented carbide that strengthens Co-Ni base binding phase by Si and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Pre-wet grinding 0.6wt% of the total weight of silicon carbide powder with a particle size of 0.6 μm for 6 hours, then adding 10wt% cobalt powder, 10wt% nickel powder and the remainder of tungsten carbide powder and then wet grinding for 18 hours, After the wet grinding mixture is spray-dried and pressed into shape; after the compact is sintered in a low-pressure liquid phase at 1450 ° C, a pressure of 0.6 MPa, and a holding time of 1 h, the Si-enhanced Co-Ni binder phase of the present invention can be obtained. quality alloy.

[0023] Characterize the microstructure of the cemented carbide prepared in this embodiment, its structure is as follows figure 1 As shown, the ordered phase is the strengthening phase, and the phase structure is A3B (where A represents Co and / Ni elements, and B represents Si elements).

Embodiment 2~9

[0033] The preparation process of Examples 2-9 is basically the same as that of Examples, and its specific proportioning and process parameters are as shown in Table 1.

[0034] Table 1 The preparation parameters of the cemented carbide regeneration process of Example 1-Example 9 and some comparative examples

[0035]

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Abstract

The invention discloses a new type of cemented carbide with a binder phase and a preparation method thereof. According to the mass percentage, 10-15wt% of cobalt, 10-15wt% of nickel, 0.6-2.5wt% of silicon carbide and the balance of The composition of tungsten carbide. The present invention adopts Si to strengthen the Co-Ni bonding phase to strengthen the cemented carbide, and the ordered strengthening phase is dispersed and distributed in the bonding phase. Under comparable conditions, compared with the existing Co-Ni binder phase cemented carbide, the Co-Ni-Si reinforced cemented carbide of the present invention can achieve a 20% increase in the flexural strength at room temperature and high temperature Moreover, the process of the invention is simple and controllable, which is beneficial to realize industrialization.

Description

technical field [0001] The invention belongs to the technical field of cemented carbide, and in particular relates to a cemented carbide with a new binder phase and a preparation method thereof, in particular to a cemented carbide with WC as the hard phase and Co-Ni-Si as the binder prepared by powder metallurgy technology. Reinforced cemented carbide and its preparation method. Background technique [0002] WC-based cemented carbide is widely used as cutting tools, mining tools and wear-resistant parts due to its high strength, high hardness, high wear resistance and high red hardness. It is well known that the wear resistance of traditional WC-Co cemented carbide mainly depends on the alloy hardness. The hardness and toughness of traditional WC-Co cemented carbide are contradictory, that is, to increase the hardness of the alloy often needs to sacrifice a certain toughness as a price. Studies have shown that under the condition of equivalent alloy hardness and fracture t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10B22F9/04B22F3/10
CPCB22F3/10B22F9/04B22F2009/043C22C1/051C22C1/1084C22C29/08
Inventor 龙坚战汪巍伍文辉
Owner ZHUZHOU HARD ALLOY GRP CO LTD