In industrial production, the use of various materials to be processed, molding, which requires the use of a variety of different tools. Used to manufacture cutting tools, molds and gauges of steel collectively known as tool steel.
As a result of a variety of tools used in different occasions, their performance requirements are different. Tool steel according to the use of different can be divided into cutting edge steel, mold steel and gauge steel; according to the chemical composition can be divided into carbon tool steel and alloy tool steel.
Used for cutting tool steel, its working part is mainly in the cutting edge, known as cutting edge steel. Cutting tool steel in the cutting process by bending, shear, impact, vibration, friction and other high stress, in the working part will produce heat, so that the edge of the temperature rise, may rise to 500 ~ 600 ℃ or even higher, at the same time, the edge of the wear also occurs. Therefore, the requirements of cutting edge steel with high hardness and wear resistance, a certain degree of toughness and plasticity, some cutting edge steel is also required to have a certain degree of thermal hardness.
