Different types of cutting picks have different functions. TBM picks are mainly used in tunnel and roadway excavation; Coal Cutting Picks can cut relatively hard rocks and coal seams; picks for rotary drilling rigs are mainly used for deep mining，they can improve mining efficiency and work efficiency.The Cutting Picks have a high wear rate and may develop cold cracks during operation.
The reasons for cold cracks in cutting picks are as follows:
1. High carbon content in picks. During the manufacturing process of picks, alloy elements all increase the relative hardening ability.
2. Poor welding process. Hydrogen exists in the weld seam during welding and does not diffuse in time, causing hydrogen to accumulate in the metal and generating large stress, which leads to cold cracks.
3. The thickness of the pick weldment does not meet the standard, and the weldment has a large rigidity, increasing the welding bonding force.
4. The pick is not uniformly heated and cooled during the welding process, which makes it prone to cold cracks.
Brazing heat treatment is one of the key technologies in pick manufacturing. Currently, brazing and heat treatment of picks are integrated. In fact, it is heated in a vacuum furnace, so the brazed pick can be directly quenched without air cooling, and brazing and heat treatment can be completed in one step. After brazing treatment, the hard alloy and the pick body steel are firmly combined, effectively enhancing the impact resistance of the pick.
Weir is a cutting picks manufacturer dedicated to continuous product innovation and improving customer satisfaction. We always maintain a spirit of craftsmanship and continuously optimize the material and manufacturing process of picks. While ensuring the quality of picks, we also improve their cost performance to reduce the user's usage cost.
The above is some content about the manufacturing process of picks. We hope it is helpful to you. If you have any questions or better suggestions about picks, please contact us. Our experts will be available to serve you at any time.
1. High carbon content in picks. During the manufacturing process of picks, alloy elements all increase the relative hardening ability.
2. Poor welding process. Hydrogen exists in the weld seam during welding and does not diffuse in time, causing hydrogen to accumulate in the metal and generating large stress, which leads to cold cracks.
3. The thickness of the pick weldment does not meet the standard, and the weldment has a large rigidity, increasing the welding bonding force.
4. The pick is not uniformly heated and cooled during the welding process, which makes it prone to cold cracks.
Brazing heat treatment is one of the key technologies in pick manufacturing. Currently, brazing and heat treatment of picks are integrated. In fact, it is heated in a vacuum furnace, so the brazed pick can be directly quenched without air cooling, and brazing and heat treatment can be completed in one step. After brazing treatment, the hard alloy and the pick body steel are firmly combined, effectively enhancing the impact resistance of the pick.
Weir is a cutting picks manufacturer dedicated to continuous product innovation and improving customer satisfaction. We always maintain a spirit of craftsmanship and continuously optimize the material and manufacturing process of picks. While ensuring the quality of picks, we also improve their cost performance to reduce the user's usage cost.
The above is some content about the manufacturing process of picks. We hope it is helpful to you. If you have any questions or better suggestions about picks, please contact us. Our experts will be available to serve you at any time.