The strength and hardness of cubic boron nitride (CBN) abrasives depend only on diamonds, but their thermal stability and chemical inertness to prevent reaction with iron elements are much better than diamonds, and wear resistance is good. For materials that are difficult to grind with ordinary abrasive wheels, such as high-hard cast iron, high-speed steel, nickel-based alloys and high-temperature alloys, grinding with CBN grinding wheels can achieve the desired results.