Alloy tool steels are higher in hardenability, hardenability, wear resistance and toughness than carbon tool steels, and can be roughly divided into three types of cutting tools, dies and measuring tools according to their uses. Among them, steel with a high carbon content (carbon mass fraction greater than 0,008%) is mostly used in the manufacture of cutting tools, measuring tools and cold work dies. The hardness of this type of steel after quenching is above HRC60 and has sufficient wear resistance; steel with a medium carbon content ( (Carbon mass fraction 0.35%~0.70%) is mostly used to make hot work molds. The hardness of this type of steel after quenching is slightly lower, which is HRC50~55, but the alloy steel with good toughness is introduced
Alloy tool steel
Steel in which alloying elements such as Si, Mn, Ni, Cr, W, Mo, and V are added to carbon tool steel.
Adding Cr and Mn can improve the hardenability of tool steel. According to requirements, other elements can be selectively added or added at the same time (the total amount of addition is generally not more than 5%), that is to form a series of alloy tool steel. it is good.
Classification by use
Alloy tool steels are higher in hardenability, hardenability, wear resistance and toughness than carbon tool steels, and can be roughly divided into three types of cutting tools, dies and measuring tools according to their uses. Among them, steel with a high carbon content (carbon mass fraction greater than 0,008%) is mostly used in the manufacture of cutting tools, measuring tools and cold work dies. The hardness of this type of steel after quenching is above HRC60 and has sufficient wear resistance; steel with a medium carbon content ( (Carbon mass fraction 0.35%~0.70%) is mostly used to make hot work molds. The hardness of this type of steel after quenching is slightly lower, HRC50~55, but the toughness is good.