Aluminum-based silicon carbide is a particle-reinforced metal-based composite material composed of silicon carbide (SiC) and granular aluminum. With excellent high hardness, high toughness, high plasticity, high modulus and other advantages, it is used in aviation and aerospace. , Electronic chips, high-speed rail, satellites and other fields are widely used.
As a modern new type of composite material, aluminum-based silicon carbide composite material has many advantages, but it also has obvious shortcomings, namely, difficult machining, fast tool wear, high production cost, and low efficiency. The main reason for the difficulty in machining is that the hardness of the silicon carbide reinforced particles in the aluminum-based silicon carbide composite material is very high, which is second only to diamond. At the same time, the surface of the aluminum-based silicon carbide composite material is rough, and the distribution of silicon carbide hard points is uneven. The tool wears quickly, and at the same time, it will produce greater vibration during cutting, which affects the machining accuracy. Therefore, the choice of tool and machine tool in processing are particularly important.
Common processing methods of aluminum-based silicon carbide composite materials include milling, drilling, etc., to process curved surfaces, holes, and grooves. In order to better control costs, rough machining can be processed with cemented carbide tools, and PCD tools can be used for finishing. For milling and drilling, the hardness of cemented carbide tools is lower than that of aluminum-based silicon carbide, and the durability is low, but it can be cut with a large margin. PCD tools have high hardness, but the cutting margin is small, suitable for finishing, and guarantees aluminum-based silicon carbide Requirements for dimensional accuracy and surface roughness of composite parts. The PCD tool produced by OPT Tool Company is a synthetic polycrystalline diamond tool that can be made into PCD turning tools, blades, milling cutters, reamers, drills, etc. For aluminum-based silicon carbide composite materials, commonly used tools include PCD milling cutters and PCD drill bits. Common materials are CDW010, CDW025, and CDW302. Different materials are selected for efficient processing according to the composition of aluminum-based silicon carbide.
