The pick is the most important part in coal mining, and its manufacturing process is very strict. Pick is easy to wear in the working of shearer, so pick must go through heat treatment process in the production process, so what is the role of heat treatment process? Why do picks need heat treatment?
The heat treatment process is mainly composed of two processes: quenching and tempering, or normalizing and tempering. Generally, the heat treatment process of steel materials is normalizing and tempering. What are normalizing and tempering?
Normalizing is also known as normalization. The processing temperature is between 727 ℃ ~ 912 ℃. After a period of heat preservation, the material is taken out and treated after water spraying or cooling in the air. The purpose of this is to homogenize the composition of the material and increase the hardness of the steel material. Tempering is the next step after normalizing. The steel is placed in the medium for cooling and then treated. Tempering is to eliminate the internal stress in the steel and enhance the toughness of the steel.
The steel used to make the pick must be subject to heat treatment, otherwise the pick will not have too strong hardness, or even be unable to complete the mining work. In the process of heat treatment, the steel used for pick is strictly selected. It has not only strong hardness, but also good toughness and wear resistance. The use of Shandong Eide high efficiency pick in coal mining not only improves the working efficiency, but also does not waste effective resources. It is the preferred part of coal mining.
On 2018-08-08 11:45:46
