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Why are coal pick teeth easily damaged?
Release time:
2023-06-12
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Source:
The use of roadheader in the coal mining industry is more, with the aid of roadheader greatly improve the efficiency of coal mining. However, the coal pick on the boring machine bit, as an important component of the whole equipment, is a relatively easy to wear parts. So where is the reason why this type of pick is easily damaged? Poor impact resistance is one reason why coal picks are easily damaged. For example, the alloy on the pick will have graphite impurities, uneven distribution of grains, or cracks in the material. These can greatly increase the chances of a chipping pick. There is brazing residual stress is relatively large. For example, the thermal expansion coefficient between the alloy cutter head and the tooth body will be very different. Another is) the cracking of the head of the pick body and the partial wear make the alloy head unprotected. Also in this case, the impact resistance of the coal pick will be reduced. The second reason is that the wear resistance of the pick is relatively poor. The alloys of some cutting teeth have a high cobalt content. This leads to low density and low hardness. This also makes the alloy cutter head of the coal cutter very poor in wear resistance. Such as the quality of raw materials products, and improper operation of the heat treatment process and other reasons, will make the pick appear poor wear resistance. For the coal pick is easy to damage, there is also a situation that the alloy head is easy to fall off. And this is one of the main forms of coal cutting tooth failure. For example, some poor quality picks are mainly the poor quality of the weld and the non-standard processing size of the pick body. As a result, the weld gap is too large or too small, resulting in a "squeeze" or "lack of welding" of the alloy head. Therefore, if you want to make the coal pick durable and easy to use, you still have to choose some reliable manufacturers to ensure the reliability of the product.
The use of roadheader in the coal mining industry is more, with the aid of roadheader greatly improve the efficiency of coal mining. However, the coal pick on the boring machine bit, as an important component of the whole equipment, is a relatively easy to wear parts. So where is the reason why this type of pick is easily damaged?
Poor impact resistance is one reason why coal picks are easily damaged. For example, the alloy on the pick will have graphite impurities, uneven distribution of grains, or cracks in the material. These can greatly increase the chances of a chipping pick. There is brazing residual stress is relatively large. For example, the thermal expansion coefficient between the alloy cutter head and the tooth body will be very different. Another is) the cracking of the head of the pick body and the partial wear make the alloy head unprotected. Also in this case, the impact resistance of the coal pick will be reduced.
The second reason is that the wear resistance of the pick is relatively poor. The alloys of some cutting teeth have a high cobalt content. This leads to low density and low hardness. This also makes the alloy cutter head of the coal cutter very poor in wear resistance. Such as the quality of raw materials products, and improper operation of the heat treatment process and other reasons, will make the pick appear poor wear resistance.
For the coal pick is easy to damage, there is also a situation that the alloy head is easy to fall off. And this is one of the main forms of coal cutting tooth failure. For example, some poor quality picks are mainly the poor quality of the weld and the non-standard processing size of the pick body. As a result, the weld gap is too large or too small, resulting in a "squeeze" or "lack of welding" of the alloy head.
Therefore, if you want to make the coal pick durable and easy to use, you still have to choose some reliable manufacturers to ensure the reliability of the product.
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