What are the three types of commonly used cemented carbides?
As the mass fraction of cobalt increases, the hardness and wear resistance decrease, and the flexural strength and toughness increase.M class (equivalent to our YW class), cemented carbide is based on WC, TiC, Co, and then added TaC (or NbC). After the addition of TaC (or NbC), the comprehensive properties of cemented carbide were improved. This kind of cemented carbide can process both cast iron and non-ferrous metals, and also can process steel materials. It can also process difficult materials such as high temperature alloy and stainless steel. Commonly used brands are YW1 and YW2.
Common brands are YT5 (mass fraction of TiC is 5%), YT15 (mass fraction of TiC is 15%), with the mass fraction of TiC increased, the mass fraction of cobalt decreased, hardness and wear resistance increased, bending strength decreased. This kind of hard alloy is not suitable for processing stainless steel and titanium alloy.K class (equivalent to China's YG class), cemented carbide composed of WC and Co, also known as tungsten cobalt carbide. These alloys are mainly used to process cast iron, nonferrous metals and their alloys. The common grades are TG6 (cobalt mass fraction 6%) and YG8 (cobalt mass fraction 8%).
ISO divides cemented carbide into 3 classes: P, K and M.P class (equivalent to China's YT class) carbide by WC, TiC, and Co composition, also known as tungsten titanium cobalt carbide. This kind of alloy is mainly used for processing steel materials.
