5 Must-Have Features in a abrasive grinding wheel manufacturers

Brand name of a cubic form of boron nitride (cBN)

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Borazon is a brand name of a cubic form of boron nitride (cBN). Its color ranges from black to brown and gold, depending on the chemical bond. It is one of the hardest known materials, along with various forms of diamond and other kinds of boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than  °C ( °F) at 7 GPa (1 million lbf/in2).

Borazon was first produced in by Robert H. Wentorf, Jr., a physical chemist working for the General Electric.[1] In , General Electric adopted the name Borazon as its trademark for the material. The trademark is now owned by Diamond Innovations, doing business as Hyperion Materials & Technologies, Inc., and Borazon is manufactured only by Hyperion Materials & Technologies.[2]

Uses and production

Borazon has a number of uses [clarification needed], such as: cutting tools, dies, punches, shears, knives, saw blades, bearing rings, needles, rollers, spacers, balls, pump and compressor parts, engine and drive train components (e.g. camshafts, crankshafts, gears, valve stems, drive shafts, CV joints, piston pins, fuel injectors, turbochargers, and aerospace and land-based gas turbine parts such as vanes, blades, nozzles, and seals), surgical knives, blades, scissors, honing, superfinishing, cylinder liners, connecting rods, grinding of steel and paper mill rolls, and gears.

Prior to the production of Borazon, diamond was the preferred abrasive used for grinding very hard superalloys but it could not be used effectively on steels because carbon tends to dissolve in iron at high temperatures. Aluminium oxide was the conventional abrasive used on hardened steel tools.[3]

Borazon replaced aluminium oxide for grinding hardened steels owing to its superior abrasive properties, comparable to that of diamond.[3] Borazon is used in industrial applications to shape tools, as it can withstand temperatures greater than  °C ( °F), much higher than that of a pure diamond at 871 °C ( °F).[4] Other uses include jewellery designing, glass cutting and laceration of diamonds.

CBN-coated grinding wheels, referred to as Borazon wheels, are routinely used in the machining of hard ferrous metals, cast irons, and nickel-base and cobalt-base superalloys. They can grind more material, to a higher degree of accuracy, than any other abrasive. The limiting factor in the life of such tools is typically determined not by wear on the cutting surface but by its break-down and separation from the metal core resulting from failure of the bonding layer.[3]

Cultural references

A Borazon drill is used in the TV miniseries and film Quatermass and the Pit. In this story an alien spacecraft is unearthed in London and the drill is used in an attempt to open a sealed bulkhead. The shell of the object is so hard that even the Borazon drill makes no impression, and when the attempt is made, vibrations cause severe distress in people around the object.

In Ivan Yefremov's novel Andromeda: A Space-Age Tale (written &#;, published Jan ) boron nitride named borazon is routinely used in sublight engine parts and spaceship surface coating.

In Randall Garrett's's short story "Thin Edge" (Analog, Dec )[5] a fictional borazon-tungsten cable of extraordinary tensile strength is a central plot element. The cable is developed by asteroid miners for a tow-rope for hauling asteroids. The protagonist cuts through cell bars and booby-traps his room using a single strand of the wire, similar to a monomolecular wire.

See also

References

Welcome to forturetools,I&#;m Brian.Today we are going to talk about&#;Five characteristics of a grinding wheel you have to know&#;

In order to select the best grinding wheels,you have to know their characteristics.

There are five characteristics of a grinding wheel: material, grain size, wheel grade, grain spacing, and bond type. They are indicated by codes on the wheel&#;s label.

1, Material and shortcode
Aluminum oxide (A)
Silicon carbide (S)
Diamond (D, MD, SD)
Cubic boron nitride (CBN)

Grinding wheels with diamond or CBN grains are called superabrasives. Grinding wheels with aluminum oxide (corundum), silicon carbide, or ceramic grains are called conventional abrasives.

2, grain size

From coarse grit to fine grit,the smaller the number is,the rougher;the larger,the finer.

3, Wheel grade
From A to Z, A is the softest grade and Z is the hardest grade.
determines how tightly the bond holds the abrasive. A to H for softer structure, I to P for moderately hard structure and Q to Z for hard structure. Grade affects almost all considerations of grinding, such as wheel speed, coolant flow, maximum and minimum feed rates, and grinding depth.

Hardness testing can use testing equipment,if you want to compare two grinding wheels hardness,you can use one grind another one,the ones which abrasive grains was separated from the wheel,it is the softer ones.

4,Grain spacing
Spacing or structure, from 1 (densest) to 16 (least dense).

5,Wheel bond
Wheel bond are the material used for holding the abrasives; affects finish, coolant, and minimum/maximum wheel speed.
Vitrified(short code V),Resinoid(short code B),Rubber(short code R),Metal(short code M),Plated(short code P)

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