Mold steel is a special type of steel that is used to make molds. It has the advantages of high strength, high hardness, high wear resistance and high corrosion resistance, and is widely used in automobiles, electronics, home appliances, aerospace and other industrial fields. Among them, Q345 is a common die steel material, and the characteristics, uses and processing technology of Q345 die steel will be introduced in detail below.
Q345 die steel is a kind of low-alloy high-strength structural steel, and its chemical composition mainly includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S) and other elements. Among them, the carbon content is lower, usually at 012%~0.between 20% and the silicon content is 020%~0.Between 55%, the manganese content is 120%~1.60%, phosphorus and sulfur content is lower. The design of this chemical composition makes Q345 die steel have good weldability, plasticity and machinability.
The main characteristics of Q345 die steel are as follows:
High strength: The yield strength of Q345 die steel is 345MPa, and the tensile strength is 470-630MPa, which is more than double that of ordinary carbon structural steel. This high strength makes the mold have better resistance to deformation and load-bearing capacity.
2.High hardness: The hardness of Q345 die steel is usually between 150-250HB and has high wear resistance. This hardness allows the mold to withstand large impact and friction, prolonging the service life of the mold.
3.Good corrosion resistance: Q345 die steel has good corrosion resistance and can resist the erosion of atmosphere, water and some chemical media. This corrosion resistance allows the mold to be used for a long time in harsh working environments.
4.Good machinability: Q345 die steel has good plasticity and machinability, and can be formed and processed by heat treatment, cold working and machining. This machinability allows the mold to meet the needs of different shapes and sizes.
Q345 die steel has a wide range of applications, mainly used to manufacture various molds, such as plastic molds, die-casting molds, stamping molds, forging molds, etc. It can be used to manufacture auto parts, home appliance housings, electronics, aerospace parts, etc. Because Q345 die steel has high strength, high hardness and high wear resistance, it can withstand large impact and friction, so it has been widely used in the mold manufacturing industry.
The processing technology of Q345 die steel mainly includes two aspects: heat treatment and machining. Heat treatment is the method of heating and cooling to change the microstructure and properties of steel to improve its hardness and strength. Common heat treatment methods include quenching, tempering, normalizing, etc. Machining is the processing of steel by cutting, milling, drilling, etc., to obtain the desired shape and size. In the machining process, it is necessary to pay attention to the selection of appropriate cutting tools and machining parameters to ensure the quality and efficiency of machining.
In a word, Q345 die steel is a common die steel material with the advantages of high strength, high hardness, high wear resistance and high corrosion resistance. It is widely used in automobiles, electronics, home appliances, aerospace and other industrial fields to manufacture various molds. During the machining process, heat treatment and machining are required to increase the hardness and strength of the steel and obtain the desired shape and size.