Carbide drill bit selection and application of the so-called carbide is tungsten carbide powder as matrix, cobalt powder as a binder by pressing, sintering. Generally contain 94% tungsten carbide, 6% cobalt. Because of its high hardness, very wearable, there is certainly strength, drill bit for metal suitable for high-speed cutting. However, poor tolerance, very brittle, cemented carbide in order to improve the function of some diamond grinding cup wheels of the carbide substrate selected chemical vapor accumulation Typical hard titanium carbide layer of 5 to 7 microns (TIC) or titanium nitride (TIN), to having a higher hardness. Some ion implantation technology, titanium, nitrogen, and carbon injection depth of the matrix must not only increase the hardness and strength but also in the drill head regrinding inject these ingredients can move into. There's a way to generate the physical layer of diamond film on top of the drill bits, drill bits greatly improved hardness and wear resistance. Bits of information selection
Based on the information processing characteristics, needs drill head has the following characteristics: Hardness drill head must be greater than the hardness of the workpiece; drill bits bear because when the workpiece big change and axial forces, and therefore must have the strength to meet and patience; drill bit for metal processing data patience because it is good Diamond Cutting Blades when you want to meet the needs of a sharp cutting edge, and thus abrasion tool data must have the ability to meet, so as to reduce work hardening; Because the chemical properties of the workpiece to be high, and thus the demand tool Information and titanium affinity worse, to avoid the formation of sticky knife stroke scattered, broken drill appearance.
Currently, the tool for doing an extremely wide range of data types, including tool steel, carbide, hard materials.
At first, try to use an ordinary high-speed drill rod coating head test, ordinary low-speed drill rod head price, was elected with a coating technology that can significantly reduce the friction coefficient of the tool and the workpiece, increase tool life expectancy. However, because of higher machine speed, the use of solder joint strength is not enough, drill bit for metal forming process broken drill bit, the role is not ideal.
Carbide is a tool developed for the latest information, most of the information applies to rough finish, including steel, cast iron, special materials and plastics. To this end, decided to use solid carbide drill bits
