Invalidation Mode of Tungsten Carbide Mining Button

The tungsten carbide mining button is composed of mining button handle, button head and alloy cutter head. The mining button handle and its cutter head are collectively referred to knife body. Its hardness is 40-45HRC. The pounding tenacity is not less than 49J/cm2.

There are many types of mining button. The general structure is to insert a carbide cutter head into a steel body with low-alloy structure that has been quenched and tempered.

There are two modes of traditional normal mining button:

1. With the abrasion of the tungsten carbide button head, it will be so blunt that it is difficult to cut the rock effectively. When the number of buttons on the roller reaches a certain amount, the tunneling speed will be significantly slower. At this time, it is necessary to stop the machine for examination and replace the button.

2. Owing to the low durability of steel basal body, the working basal body gets a lot of wear before mining button is worn. When it is severely worn, the support for the mining button head is lost so that the alloy is completely detached without being completely used. The mining button ceases to be effective. In order to deal with the failure modes, people improve the wear resistance of the button by various methods which includes using the tungsten carbide with fine performance and high wear resistance and the alloy with high hardness and fine mechanical property as a substrate. 

The mining button has low wear resistance. Therefore, we should do the prevention well. Selecting a fine knife body is very important. The property will directly affect the performance of shearer, the power consumption, the stability, and the lifetime of other relevant parts. 

The mining button is the main part of mining machinery and tunnel machinery which plays an important role in the cutting of the coal bed and rock formation, coal mining and tunneling. At present, mining buttons are commonly used in coal mines. They are quickly worn out with high power consumption in complex environments. The performance of tungsten carbide mining button is far from the requirements of high-yield and high efficiency.

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