Die steel 738 is a commonly used die steel material with excellent mechanical properties and wear resistance, which is widely used in the mold manufacturing industry. The following will be introduced in detail from the aspects of material composition, mechanical properties, heat treatment process and application fields.
First, the composition of the material.
Die steel 738 is mainly composed of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), molybdenum (Mo), cobalt (Co) and other elements. Among them, carbon is the main element to improve the hardness and strength of steel, silicon and manganese can improve the strength and toughness of steel, phosphorus and sulfur are impurity elements in steel, which have a certain impact on the performance of steel, chromium, molybdenum and cobalt are alloying elements, which can improve the wear resistance and corrosion resistance of steel.
2. Mechanical properties.
Die steel 738 has high hardness, strength and toughness, and its mechanical properties mainly include tensile strength, yield strength, elongation and impact toughness. Generally speaking, the tensile strength of die steel 738 is between 1200-1500MPa, the yield strength is between 1000-1300MPa, the elongation is between 10-15%, and the impact toughness is between 20-30Jcm. These mechanical properties make die steel 738 able to withstand large loads and impact loads, and has good wear resistance and corrosion resistance.
3. Heat treatment process.
The heat treatment process of die steel 738 mainly includes annealing, normalizing and quenching steps. The annealing process can eliminate the stress inside the steel and improve the toughness and machinability of the steelThe normalizing process can improve the hardness and strength of the steel, making it suitable for some demanding mold manufacturingThe quenching process allows the steel to cool quickly, resulting in high hardness and wear resistance. The choice of heat treatment process needs to be determined according to the specific mold manufacturing requirements and the environment in which it will be used.
Fourth, the field of application.
Die steel 738 is widely used in the mold manufacturing industry, especially in the fields of plastic molds, die-casting molds and stamping molds. Because die steel 738 has high hardness and wear resistance, it can withstand large impact load and friction, so it is suitable for manufacturing some molds with high requirements, such as auto parts molds, home appliance molds, electronic product molds, etc. In addition, die steel 738 can also be used to manufacture some demanding cutting tools and cold work tools.
To sum up, die steel 738 is a die steel material with excellent mechanical properties and wear resistance, which is widely used in the mold manufacturing industry. Its material composition includes carbon, silicon, manganese, phosphorus, sulfur, chromium, molybdenum, cobalt and other elements, and has high hardness, strength and toughness. The heat treatment process includes steps such as annealing, normalizing, and quenching, which can improve the properties of the steel. The application fields mainly include plastic molds, die-casting molds and stamping molds.