For cutting tool materials for metal

For cutting tool materials for metal, generally there are hardness, toughness, strength, hot hardness, thermal conductivity and other indicators, including hardness and toughness are a very important indicator. Of course, is the ideal tool material hardness, toughness flap disc  of both. This is our tool sector targets, but there are already cutting the material properties as shown below.
For the machining of hard materials, the original use is generally fine particles toughness cemented carbide, cubic boron nitride or stiffness better. Now, some providers have developed the tool is particularly suitable for machining hard materials with a TiAlN coating fine abrasive roll  particles of carbide, such TiAlN coating 3000HV, purple.
Cubic boron nitride (referred to as CBN) is for the most hardened ferrous metal hard tool materials. Because although it is slightly lower than the hardness of the diamond, but the composition of diamond material is carbon, and ferrous metals (iron-carbon alloy) will occur in  velcro disc the processing of chemical wear and can not be used for machining ferrous metals.
Cubic boron nitride hard material processing has the following requirements: CBN content of <60%; micro-particle structure; high edge strength; low thermal conductivity
Such CBN can be used for processing 50-65HRC hard material