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What is Cemented Carbide and It's Features and Applications

August 10,2022

Cemented carbide is mainly composed of powder of one or several insoluble carbides (tungsten carbide, titanium phosphide, etc.), and metal powder (cobalt, nickel, etc.) is added as a binder. prepared alloy. It is mainly used in the manufacture of high-speed cutting tools and cutting tools for hard and ductile materials, and as a cold work die. Measuring tools and highly wear-resistant parts that are not impacted and vibrated.   

Features of cemented carbide

High hardness, wear resistance and red hardness
Cemented Carbide is an extremely hard metal.
It is harder than iron or stainless steel, and is second only to diamond.
It is twice as heavy as iron, and about the same weight as gold.

The hardness of cemented carbide at room temperature can reach 66-93HRA, which is equivalent to 69-81HRC. It can maintain high hardness at 900-1000 ℃, and has excellent wear resistance. with high speed
Compared with tool steel, the cutting speed can be 4-7 times higher, the service life is 5-80 years longer, and it can cut hard materials with a hardness of up to 50HRC.


The hardness is next to diamond and same weight as gold.


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(2) High strength and elastic modulus
The compressive strength of cemented carbide is as high as 6000MPa, and the elastic modulus is (4-7)=105MPa, which is higher than that of high-speed steel. But its flexural strength is low, generally 1000-300CMPa.
(3) Good corrosion resistance and oxidation resistance
Generally, it has good resistance to atmospheric, acid, alkali and other corrosion, and is not easy to be oxidized.

Commonly used carbide
Commonly used cemented carbides are divided into three categories according to their composition and performance characteristics: tungsten-cobalt, tungsten-titanium-cobalt, and tungsten-titanium-tantalum (niobium). The most widely used in production are tungsten-cobalt and tungsten-titanium-cobalt cemented carbides.

(1)Tungsten-Cobalt Cemented Carbide 
The main components are tungsten carbide (WC) and cobalt.  The material used to bind the powder is cobalt. and the grade is represented by the code YG ("hard", "cobalt" two words Chinese Pinyin prefix), followed by the percentage of cobalt content. For example, YG6 represents a tungsten-cobalt-based cemented carbide with a cobalt content of 6% and a tungsten carbide content of 94%.
It is not a natural metal, but rather a man-made metal.


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(2) Tungsten-titanium-cobalt carbide
(3) Tungsten-titanium button (niobium) hard alloy  

Applications
1. Inserts for metal cutting
2. Insert coatings
3. Inserts for mining tools
4. Rolls for hot-roll and cold-roll applications
5. Other industrial applications
6. Engineered components
Wear parts---Zonco’s business Scope      
Tools and tool blanks
Some key areas where cemented carbide components are used: 

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