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Mining hard alloy

A cemented carbide and mining technology, applied in the field of cemented carbide, can solve the problems of low work efficiency, many varieties of cemented carbide drill bits, and cannot effectively solve the problems of toughness and wear resistance of cemented carbide, so as to improve work efficiency, The effect of improving rock drilling efficiency and service life

Inactive Publication Date: 2012-05-16
山东凿岩钎具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage is that it cannot effectively solve the contradiction between the toughness and wear resistance of cemented carbide
If a drill bit with high cobalt content is used, it is suitable for drilling rocks with a hardness coefficient of 12 or more. When the rock coefficient decreases with the drilling footage, it is not suitable for it, and only cemented carbide with low cobalt content can be replaced. Drills, low work efficiency, many varieties of hard alloy drills required

Method used

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  • Mining hard alloy
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1. Such as figure 1 , 2 As shown, the whole cemented carbide adopts two layers, and the content of cobalt in the raw material of the inner layer 1 is higher than that of the outer layer 3 . For example, the content of cobalt in the raw material of the inner layer 1 is 9-11%, and that of the outer layer 3 is 5-8%.

Embodiment 2

[0012] Example 2. Such as figure 1 , 2 As shown, the whole cemented carbide adopts two layers, and the content of cobalt in the raw material of the inner layer 1 is lower than that of the outer layer 3 . For example, the content of cobalt in the raw material of the inner layer 1 is 5-8%, and that of the outer layer 3 is 9-11%.

Embodiment 3

[0013] Example 3. On the basis of Example 1 or 2, the particle size of the raw material of the inner layer 1 is smaller than or smaller than that of the outer layer 3 . For example, the particle size of the inner layer 1 is 0.8-1.5um, and the particle size of the outer layer 3 is 1.6-3um; or the particle size of the inner layer 1 is 1.6-3um, and the particle size of the outer layer 3 is 0.8-1.5um.

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Abstract

The invention relates to a mining hard alloy, in particular to a hard alloy specially applied to a rock drilling tool. The hard alloy is mainly prepared from tungsten carbide and cobalt carbide by sintering, and the hard alloy is characterized in that the whole hard alloy is divided into more than two layers from inside to outside, cobalt contents and particle sizes of the layers are different. Thus the hard alloy has the optimal abrasion resistance and toughness, rock drilling efficiency and service life are effectively improved. Meanwhile, key position effect of cobalt is fully exerted, and useful effect of the hard alloy is played, thus the effect of cobalt saving is achieved.

Description

technical field [0001] The invention belongs to the field of cemented carbide, in particular to a cemented carbide specially used for drilling rock tools. Background technique [0002] The main raw materials of cemented carbide for mining are tungsten carbide and cobalt, which are mixed with a binder, pressed into shape, and sintered. It is one of the main components of the rock drill bit. In the application, the cemented carbide has to withstand large and high-frequency impact energy, and requires high wear resistance to ensure the anti-wear requirements in the operation; at the same time, it requires considerable toughness to prevent early embrittlement. The processing flow of cemented carbide currently used is: mixing (tungsten carbide and cobalt)--ball milling-adhesive (binder)-forming-removing glue-sintering-finished product, the particle size and raw material of cemented carbide manufactured by this process The content is uniform, and the general particle size is 1.2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/04
Inventor 李明锁周文金
Owner 山东凿岩钎具有限公司
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