Carbon tool steel is a high-carbon steel that does not contain alloy elements. The carbon content is in the range of 0.65%-1.35%. Its production cost is low, the source of raw materials is easy to obtain, and its cutting processability is good. After heat treatment, it can obtain high hardness and It has high wear resistance, so it is a widely used steel type for manufacturing various cutting tools, molds, and measuring tools. However, this type of steel has poor red hardness, that is, when the working temperature is greater than 250°C, the hardness and wear resistance of the steel will drop sharply and it will lose its working ability. In addition, carbon tool steel is not easy to harden if it is made into larger parts, and is prone to deformation and cracks.
