2012年11月30日星期五

Chemical Analysis of Tungsten Carbide Ball


Making spectrographic chemical analysis of Tungsten Carbide can be difficult and uncertain, so the accepted procedure is to use a magnetic permascopic evaluation. If anyone tells you that they can analyze tungsten carbide to an exact figure, ask them for the error budget on their process. If they know the uncertainty, it will be in percentage points.

The same exactness of chemistry and physical properties in tungsten carbide that are experienced with alloy metals cannot be expected, as T.C. is made from a physical mixture of a pure metal powder and a powdered ceramic. There will naturally be more variability in performance.

The stiffness or Young's modulus of elasticity given for Tungsten Carbide has been measured in tension, but balls are almost always used in compression. In our experience, the Young's modulus of elasticity of cemented tungsten carbide is actually 10% higher in compression than it is in tension.


2012年11月29日星期四

The performance of tungsten carbide ball

Tungsten Carbide Balls good performance at temperatures up to 800 degree Fahrenheit ( 427 centigrade ) make it a good choice in high temperature applications.

Tungsten Carbide Balls has good corrosive resistance in many environments.

The material has a very low rate of thermal expansion, at 2 microinches per inch per degree Fahrenheit (4.9 X 10-4 per degree C). Steel is 6.4 and aluminum is 12 microinches per inch per degree Fahrenheit.

One of the very important features of this material is that it is electrically conductive, with a resistivity of two micro ohms per centimeter. This conductivity sets it apart from other hard stiff materials, such as ceramics and sapphire, because it allows it to be machined into complex forms by the Electrical Discharge Machining (EDM) process. Cemented Tungsten Carbide can be ground and lapped using diamond grit. The material is slightly magnetic. Small diameter balls can be picked up with a magnet. Cemented Tungsten Carbide is very heavy, with a density of .54 pounds per cubic inch or 15 grams per cubic centimeter.

Cemented Tungsten Carbide is neither a metal nor is it a ceramic. It is a cermetal although this isn't a widely used term. This is a combination of a large percentage of Tungsten Carbide ceramic particles bonded together by a small percentage of a metallic binder, to form a solid mass.

2012年11月28日星期三

Physical Property of Tungsten Carbide Ball

Cemented Tungsten Carbide is an incredible material. It was originally developed for use as a cutting tool, in machine tools applications, where it still finds wide use today.
It is extremely hard at 91 HRA which is equivalent to 1500 Vickers 30. This material is very wear resistant, with some abrasion tests showing it at 30 times hard steel. It has good long-term dimensional stability, which makes a good material for gage applications.
Cemented Tungsten Carbide is extremely stiff, with a Young's modulus of elasticity of 98,000,000 pounds per square inch, compared with steel at 30,000,000 PSI. This high stiffness makes cemented tungsten carbide balls a good choice for ball-sizing and they provide premier results as components of kinematic couplings.

2012年11月27日星期二

The Characteristic of Tungsten Carbide Nozzle

Tungsten carbide nozzle is made from hot pressing with straight bore and venturi bore type. Due to its hardness, low density and excellent wear and anti-corrosion, Tungsten carbide nozzle has been widely used in sandblasting and shot peening equipment, offering a long life with optimum air and abrasive use.

2012年11月26日星期一

What is Tungsten Carbide Nozzle?

Tungsten carbide nozzle is a device designed to control the direction or characteristics of a flow (especially to increase velocity) as it exits (or enters) an enclosed chamber or pipe via an orifice. For nozzles, tungsten Carbide nozzle is the most rugged and durable and provides the best value.

2012年11月23日星期五

Tungsten carbide bar

Tungsten carbide bar is widely known as one kind of carbide cutting tools, it’s available for different grinding geometric parameters and suitable for both cutting materials and nonmetal materials, also it can be applied to conventional, semi-automatic lathe, automatic lathe and planning machine to work grooves and operate cutting, etc.

2012年11月22日星期四

Tungsten Carbide Mechanical Rings

Tungsten Carbide Seal Rings are used as Mechanical Seal faces in pumps, Compressors and Agitators. These are used in Oil Refineries, Petrochemical plants, Fertilizer Plants, and Drugs/Pharmaceutical Industries. Mechanical seal rings are developed to withstand high temperature, high pressure & highly corrosive chemical attack. We manufacture Rings in various shapes like Plain Ring, DA type, T-shape, L-shape and in shapes as per customers requirement. Tungsten Carbide Rings are generally made with Cobalt as binder material. Nickel bonded Rings also can be supplied.