Tungsten and molybdenum, having high melting point, are used in many industrial fields because of their excellent high-temperature resistance. They are used for electric bulbs filament, discharge-lamp electrodes, electronic bulb components, welding electrodes, heating elements, etc.

 

Nippon Tungsten produces tungsten powder for raw materials and wires and rods made from tungsten and molybdenum in various shapes according to each application.

 

 

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What do you imagine when someone asks what cemented carbides is?

You may say, "What is it? I don't know exactly. It sounds very hard. Is it harder han diamond?" What kinds of hard material do you know in our environment? You may think of glass, sapphire, stone, iron and diamond. What is the order of hardness among them? In your elementary or junior high school days, you might try to rub two stones each other and study that one got hurt is the softer. The hardness determined by that method is Moh's hardness. Table 1 shows an example of the hardness. The table also shows other indexes for hardness. 

 

In the table, cemented carbide is classified as degree 9, showing that it is harder than almost all minerals such as sapphire. Among natural minerals, diamond is only harder than cemented carbide, and those in artificial minerals harder than cemented carbide are very few like silicon carbide and boron carbide. Therefore, cemented carbide is not the hardest material. Why is it called "ultra hard" alloy ? That is because it is the hardest in metals.

 

 

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Email: sales@chinatungsten.com
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All the metals we can see have shapes. They are a body and parts of a car, parts of a pencil case, and a screw. They all have the shapes according to applications. 

 

In giving a shape to a metal, the metal must be cut or shaved. The saw or knife used in such a work is the cemented carbide. Therefore, cemented carbide must be the hardest in metals. In addition, the secret of the hardness is that cemented carbide contains hard substance and tough metals that bond the substance. The hard subsistence is tungsten carbide (WC), carbide of tungsten. Diamond made of carbon is as hard as diamond is, and the composite of tungsten and carbon is the second hardest. Tough metals are cobalt (Co) and nickel (Ni) which are the families of iron. These two metals make a hard and strong alloy in combination with each other. The structure of cemented carbide is shown in Fig. 1 below.

 

 

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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The cemented carbide roller has been used in various areas of metal plastic processing. From non-ferrous metals to steel, cold-rolled foil from hot-rolled wire, pipe, steel, etc. used cemented carbide roller. China is capable of producing dozens of varieties from φ8 ~ φ300mm specifications cemented carbide roller. With wire finishing high-speed (maximum speed up to 130 m / s), the people are exporting methods to improve the strength and hardness of the cemented carbide roller. Which is added a small amount, TaC, NbC and Ni, Cr, Mo, and other elements in the cemented carbide roller; and by hot isostatic pressing, vacuum sintering a low pressure hot isostatic pressing, heat treatment and other means to take better quality roll system.

 

Chinatungsten Online can provide various sizes and grades of cemented carbide products,deep processing and mold design and production , non-standard products can also be customized according to customer requirements. Welcome to consult and purchase sales@chinatungsten.com .

 

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