How To Choose The Grade Of Cemented Carbide For Mining Tools

The correct choice of cemented carbide mining tool grades is one of the most important factors to ensure the effective use of cemented carbide.

When choosing cemented carbide grades, the toughness of the alloy should be emphasized for extremely hard Threading Inserts rocks and heavy-duty rock drills with large impact energy, and alloy grades with higher cobalt content should be selected; for hard, brittle, and corrosive rocks, emphasis should be placed For the wear resistance of the alloy, select alloy grades with slightly lower cobalt content; for medium-hard and below-medium-hard rocks, use alloy grades with lower cobalt content and higher hardness; for coal mining under heavy loads Cemented carbide for machine picks is mainly used to reduce the content of cobalt and increase the grain size, thereby greatly improving the bending strength and impact toughness of the alloy; for cylindrical teeth, cross, and three-blade drill bits, use hardened with lower cobalt content. Quality alloy. At the same time, the following points should be noted:

1. The physical and mechanical properties of the rock formation, such as hardness, friction, etc. and its shape characteristics. The generally adopted principle is: the APMT Insert harder the rock to be cut, the better the toughness of the selected alloy sheet, but not too soft. Note that the wear resistance should not be too low, because too soft will increase the consumption of the alloy and reduce the drilling efficiency. For rock formations with many cracks, regardless of the hardness and the type of rock drill used, the cross-shaped bit should be used .

2. Model of rock drill, such as light, heavy, etc.;

3. Rock crushing method (cutting, shearing, crushing, crushing, etc.);

4. Equipment capacity (wind pressure level)