7000 series aluminum alloy 7075 mainly contains zinc. It also belongs to the aviation series. It is an aluminum-magnesium-zinc-copper alloy, a heat-treatable alloy, and a supernatural alloy. It has good wear resistance and weldability, but poor corrosion resistance.

Currently relying on imports, China’s consumer technology needs to be improved. The 7075 is used to make aircraft structures and the future. He required techniques for processing high-strength, corrosion-resistant, high-stress structural parts, as well as aluminum alloys made from molds.

It can corrode hard alloys. Although aluminum alloys with more than 12% silicon content are commonly known as high-silicon aluminum alloys and diamond tools are recommended, this is not necessarily the case. As the silicon content increases, the destructive power of the tool increases gradually.

Therefore, some manufacturers recommend diamond tools for silicon content in excess of 8%. Aluminum alloys with silicon content between 8% and 12% are transition zones, which can be used by both common carbide and diamond tools.

Aluminum alloy 7075

But the use of hard alloy should be PVD(physical coating) method, this method does not contain aluminum elements, and the film thickness is small.

Because of the PVD method, the film thickness is small, the knife may stick on the sharp edge (otherwise in order to prevent the film from abnormal growth in the edge, the edge needs to stop passivation enough, cutting aluminum alloy is not sharp enough). However, the aluminum content of the film data may cause the blade film to fit with the workpiece data, breaking the separation between the film and the tool base.

At present, the superhard coating is mainly composed of aluminum, nitrogen, and titanium compounds. With the peeling of the coating, a small amount of carbide matrix will be peeled off.