How to Produce Tungsten Carbide

We all know that carbide alloys are made from tungsten carbide, but do you know the secret of how to produce it? This passage might tell you the answer. The production of the cemented carbide is to mix carbide powder and bond powder in a certain proportion, pressurize into various shapes, and then semi-sintered. The sintering temperature is 1300-1500°C.

When manufacturing cemented carbide, the selected raw material powder has a particle size between 1 and 2 microns, and the purity is very high. The raw materials powders are mixed according to the specified composition ratio, it can reach different grades according to the different proportions of WC and bond powder. Then the medium is added to the wet ball mill to wet-grind them for making them fully mixed and crushed. After drying and sieving, the forming agent is added, and the mixture is dried and sieved. Next, when the mixture is granulated and pressed, and heated close to the melting point of the binder metal (1300-1500°C), the hardened phase and the binder metal will form a eutectic alloy. After cooling, a solid whole is formed. The hardness of cemented carbide depends on the WC content and grain size, that is, the more proportion of WC and the finer the grains, the greater the hardness. The toughness of the carbide tool is determined by the bond metal. The higher the content of the bond metal, the greater the bending strength.

Do you think after cooling the product is fully done? 

The answer is no! After that, it will be sent for a lot of tests. Tungsten carbide products can reflect the difference in mechanical properties in chemical components, tissue structures, and the heat-treatment process. Therefore, the hardness test is widely used in the inspection of carbide properties, which can supervise the correctness of the heat treatment process and the research of new materials. The hardness detection of tungsten carbide mainly uses a Rockwell hardness tester to test HRA hardness values. The test has a strong shape and dimensional adaptability of the test piece with high efficiency.

If you are interested in tungsten carbide products and want more information and details, you can CONTACT US by phone or mail at the left, or SEND US MAIL at the bottom of the page.