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Novel binding phase hard alloy 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 effects of improving compatibility, increasing solid solution and obvious strengthening effect.

Active Publication Date: 2021-04-06
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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  • Novel binding phase hard alloy and preparation method thereof
  • Novel binding phase hard alloy and preparation method thereof
  • Novel binding phase hard alloy and preparation method thereof

Examples

Experimental program
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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 the low-pressure liquid phase at 1450°C, the pressure is 0.6MPa, and the holding time is 1h, 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 A 3 B (wherein A represents Co and / Ni element, B represents Si element).

Embodiment 2～9

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

[0034] The preparation parameter of the cemented carbide regeneration process of table 1 embodiment 1-embodiment 9 and part comparative examples

[0035]

[0036]

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Abstract

The invention discloses a novel binding phase hard alloy and a preparation method thereof. The novel binding phase hard alloy is composed of the following components of, in percentage by mass, 10 wt%-15 wt% of cobalt, 10 wt%-15 wt% of nickel, 0.6 wt%-2.5 wt% of silicon carbide and the balance of tungsten carbide. According to the novel binding phase hard alloy, the Si-reinforced Co-Ni binding phase is adopted to reinforce the hard alloy, the ordered reinforcing phase of the hard alloy is dispersed and distributed into the binding phase, under equivalent conditions, compared with an existing Co-Ni binding phase hard alloy, the reinforced hard alloy with Co-Ni-Si as the binding phase has the advantages that the room-temperature and high-temperature bending strength can be improved by 20% or above, and moreover, the process is simple and controllable, and industrialization is facilitated.

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 hardness of the alloy. However, the hardness and toughness of traditional WC-Co cemented carbide are contradictory, that is, to increase the hardness of the alloy often requires sacrificing a certain toughness as a price. Studies have shown that under the condition of equivalent alloy hardn...

Claims

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Application Information

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Patent Type & Authority Applications(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
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