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The New Trend of Tungsten Carbide Materials |
| Author : Date : 2011-10-23 11:01:07 |
The New Trend of Tungsten Carbide Materials
Since 1923 when German Schroter invented the tungsten carbide with powder metallurgy technology, the tungsten carbide materials have been used more and more widely in metal cutting, rock mining, intergrated circuit process, drawing dies etc fields with its high hardness, high-temperature and corrosion resistance etc a series of excellent performance.
The consumption of tungsten carbide cutting tools have risen with the speed of 3% each year. Since 1990s, the mechanical-manufacturing technology as the forerunner of advanced technology has developed with unprecedented speed and range under promotion of fierce market competition. As high productivity and quality are the two goals of development of advanced manufacturing technology, so, higher and higher requirements put forwarded for the industrial teeth that tungsten carbide materials.
The WC is fragile material ,and generally taken Fe,Co, and NI as binder phase .In tungsten carbide products ,WC hard phase afford high hardness and wear-resistance but Co binder provide with necessary toughness and tension. Thereby, there is a contradiction existing between hardness and toughness, which is also the major factor bewildering the tungsten carbide materials’ development. However, the emerging of nanometer materials gave a new way for solving this problem in 1980s,if the grain size is decreased by an order of magnitude, there will be a leap in toughness. Consequently, it is available to produce high-hardness and high-toughness tungsten carbide products with nanometer WC-Co raw materials. |
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