How to choose a coated milling cutter for processing titanium alloy?

What kind of coated milling cutter should you choose to process titanium alloy? As we all know, titanium alloy is a difficult material to process. The difficulty of processing titanium alloy does not lie in how hard the material is, but in that the material is very easy to process during processing. Burning the knife, in many cases, aggravates the wear and tear on the knife, and we will find that the tip of the knife is completely broken. So what is the reason for this?
Titanium alloy takes TC4 as an example. The hardness is 375 and the tensile strength is 1262. It is highly sticky. A large amount of cutting heat is generated during titanium alloy processing, which is not well eliminated. Titanium alloy chips are relatively sticky, causing the chips to stick. A large amount of cutting heat accumulates at the knife edge, making the knife edge particularly susceptible to burns;
 Secondly, the thermal conductivity of titanium alloy is low, so when we choose titanium alloy processing milling cutter, we must not only choose the appropriate material and tool structure, but more importantly, choose the appropriate coating. Then we recommend the coating of this milling cutter. Its color is light yellow, and its elements are mainly zirconium-containing coating elements. This type of coating has a low friction coefficient and good high temperature resistance. In particular, it can remove debris from the tool groove at a relatively fast speed. It moves away and takes away a lot of heat. As long as the heat is reduced, the service life of the tool will be greatly extended during the processing of titanium alloy. According to our tests, the service life of this type of coated milling cutter is better than Traditional coatings need to be improved by more than 50%, sometimes doubled.
Titanium alloy is a typical difficult-to-machine material. Due to its high viscosity, it is easy to stick to the tool, and its thermal conductivity is low. Therefore, during the cutting process, titanium alloy is particularly prone to chipping of the milling cutter, and even the entire blade part will be burned, completely Loss of cutting power.


          Please look at the material properties of titanium alloy. Due to its high tensile strength, it is difficult for the chips to fall off the body during the cutting process of titanium alloy. At the same time, titanium alloy also easily adheres to the rake surface of the tool, causing adhesive wear of the tool. TC4, whose material composition is Ti-6Al-4V, (belongs to α+β) type titanium alloy, is one of the difficult-to-machine materials, and its processability is only 20% to 40% of 45 steel. Therefore, the selection of titanium alloy cutting tools and titanium alloy cutting parameters is particularly important.

Titanium alloy special milling cutter, tested in the field of orthopedic medical machining, 3mm milling cutter, layer milling to process holes with a diameter of 4.2mm, titanium alloy steel plate thickness 4mm, flushed with coolant, service life is 2-3 times that of the same type of milling cutter .


         At the same time, some stainless steels also need to be processed with special milling cutters for titanium alloys, such as PH solid solution hardened stainless steel. It can be seen from the hardness and tensile strength values that 17-4 or 15-5 stainless steel is very close to titanium alloys. Customer tests Also on the surface, Kenli titanium alloy special milling cutter has excellent cutting effect on PH stainless steel. For example, forged 1Cr18Ni9Ti.

       Focusing on the production of difficult-to-machine milling cutters, including stainless steel milling cutters, 316L, 17-4PH stainless steel, etc., as well as titanium alloy TC4, etc. In particular, the company has its own coating furnace and has developed a special coating for titanium alloys with a low friction coefficient. With good lubrication performance and high temperature resistance, it is the best choice for titanium alloy milling cutter coating.