The operation condition of tungsten carbide mining button beading layer is relatively complicated. During the cutting of coal and rock, the mining button not only needs to bear cyclic pressure, tangential stress and the effect of impulsive load but also have to stand the long-time abrasive wear, the temperature rise caused by impacting force and the corrosion caused by corrosive medium.

The tungsten carbide mining button is composed of mining button handle, button head and alloy head. The hardness of bit is 40-45HRC. The pounding tenacity is not less than 49J/cm2. There are many types of mining buttons. The general structure is to insert a alloy head into a steel body with low-alloy structure that has been quenched and tempered.

The wear resistant beading layer of mining button is a circle strip with a certain width(20~30mm) and a certain thickness(2~3mm) which is formed by adopting the way of the beading along the button circle. This circle strip prevents button head from directly contacting with the coal and rock in order to avoid the wear of base metals. Meanwhile, the extension of button head lifetime guarantees the normal operations of button bit which avoids the invalidation of button caused by the premature detachment of bit.

There is a glossary about mining button bit listed as below:

Mining Button: a mechanical part which is applied to mining machinery

Flat Mining Button: a button of which head is flat.

Pick-shaped Ming Button: a button of which head is tapered. 

Button Body: the solid part of button except the cemented carbide head

Button Head: the part which stretches out from button holder

Button Handle: the part in which mining button can be inserted into the holder. There are rectangular handle and cylindrical handle.

Mining Button Length: the vertical distance from the cutting head to the end of button handle.

Button Head Length: the vertical distance of the button head which stretches out from the holder top.

During the working, mining button which is one of the mining machinery parts with highest replacement amount has to bear high compressive stress, shear stress and impact load.