Why CBN wheel, not diamond wheel, for grinding ferrous materials

Why CBN wheel, not diamond wheel, for grinding ferrous materials?Diamond is the hardest material in the world, and with the advantages of high wear resistance, high hardness, high modulus of elasticity, low friction coefficient, high thermal conductivity, low coefficient of thermal expansion etc, it has been widely used to produce grinding tools for grinding all kinds of hard-to-grind materials, such as tungsten carbide, glass, ceramic, etc.

But some metals, such as Fe, Cr, Ti, Ni, etc, can’t be machined by diamond, because these metal elements will cause a series of chemical reactions, such as oxidation or graphitization reaction with diamond, the diamond grains will wear off quickly during the grinding process of above mentioned materials. CBN(Cubic Boron Nitride), as the second hardest material after diamond and with similar properties to diamond, is used for machining non-diamond-machinable metals.

CBN wheel

 Diamond wheel got loaded up very soon after few steel parts

CBN is the best suitable abrasive for grinding ferrous materials. You will hardly generate a high temperature, because CBN has an extremely good conductivity for temperature, so the heat generated is dispersed quickly.

The common materials needs to be ground by CBN wheels

* Hardened steel

* High speed steel

* Stainless steel

* High alloyed steels with at least 55 HRC

* Stellite