Cubic boron nitride wheels

The greatest use of cubic boron nitride is as an abrasive under the name Bora2on, in the form of small crystals, 1—500 p.m in si2e. Usually these crystals are incorporated in abrasive wheels and used to grind hard ferrous and nickel-based alloys, ranging from high speed steel tools and chilled cast-iron to gas turbine parts. The extreme hardness of the crystals and their resistance to attack by air and hot metal make the wheels very durable, and close tolerances can be maintained on the workpieces. 

Cubed compound, in PVC siding manufacture, 25 685 Cube lattice, 8 114t Cubic boron nitride, 1 8 4 654 grinding wheels, 1 21 hardness in various scales, l 3t physical properties of, 4 653t Cubic close-packed (CCP) structure, of spinel ferrites, 11 60 Cubic ferrites, 11 55-57 Cubic geometry, for metal coordination numbers, 7 574, 575t. See also Cubic structure Cubic symmetry Cubic silsesquioxanes (CSS), 13 539 Cubic structure, of ferroelectric crystals, 11 94-95, 96 Cubic symmetry, 8 114t Cubitron sol-gel abrasives, 1 7 Cucurbituril inclusion compounds,... 

Superabrasive wheels include diamond wheels and cubic boron nitride (CBN wheels. 

Tools made from polycrystalline p-BN (and y-BN) [63, 64] can be machined by laser irradiation [65]. Dressing of hard boron nitride tools can be done with sintered alumina-metal (Fe, Cu) sticks [66], and burnishing cubic boron nitride sinters can be done against a smooth complementary p-BN surface [76]. On the other hand, AI2O3 grinding wheels can be dressed by P-BN sintered tools [68]. 

Metal bonded wheels are made nearly exclusively with diamond for very severe applications where high mechanical strength is required. Electroplated cubic boron nitride products are also finding applications, especially of very difficult to grind and very hard steels. 

Extensive ranging of abrasive wheel geometries, abrasive materials (aluminum oxide, emery, corundum, diamond. Cubic Boron Nitride (CBN)), grain size, hardness grading and bond types (resin, vitrified glass, rubber, metal) are available. 

Internal circular grinding is a production technique that is often used to manufacture roller bearings, see Fig. 8.33. The production costs for such components are mainly determined by the required grinding operations, whereby internal circular grinding is the greatest cost factor. This is one of the reasons why in recent years, users have applied grinding wheels with cubic crystalline boron nitride (CBN) embedded in ceramic material, especially for internal circular grinding. 

---