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Carbide is a composite material including of particles mainly with tungsten carbide as hard material and a metallic binder . For this reason , with carbide it is possible to achieve hardness and toughness combinations which can’t obtained with other materials .
Both tungsten carbide and cobalt powders come from carefully selected suppliers, and each batch is carefully tested in the laboratory.
Due to its high melting point tungsten carbide (WC)can only be produced through sintering when needed for technically sophisticated applications . For this purpose , the powder consisting of the tungsten carbide ,the cobalt binder and sometimes additional alloys is mixed , milled and spray-dried .
By applying pressure the carbide powder is converted into a blank .
Each production is weighed and controlled by the operator at certain intervals to ensure high precision of the carbide.
The sintering process converts the blank into a homogeneous piece of carbide with a high degree of hardness .When sintering hard metal (usually at a temperature of approx.1400 c ) , this process is called liquid phase sintering . In this case ,the binder (e.g. cobalt ) melts and wets the WC hard material particles .After sintering , the density of the carbide is almost , or even precisely, the same as the theoretical density . Any residual porosity which occurs after the sintering procedure may be removed through an ensuring HIP process .
After sintering, grinding is performed to make the surface of the product smoother and more beautiful, so that the accuracy of the product meets the requirements.
After the production is completed, it will be sent to the quality management department and laboratory for inspection to ensure the quality of the product.
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