The structure obtained by high temperature tempering of the high temperature spring is tempered sorbite. Traditionally, the heat treatment combining quenching and high temperature tempering is called quenching and tempering treatment, so as to improve the strength, hardness, plasticity and toughness of the spring. The tempering temperature is 500-680℃, and the sorbite structure is obtained after tempering. Quenching + high temperature tempering is called quenching and tempering treatment, which can obtain comprehensive mechanical properties with good strength, plasticity and toughness, and can make some high alloy steels with secondary hardening effect (such as high-speed steel) secondary hardening. The disadvantages are The process is more complicated, and the strength is reduced while improving the plasticity and toughness. At present, thermomechanical heat treatment can be used in some places to replace quenching and tempering treatment. Ductile iron austempering replaces 45 steel quenching and tempering (Note: deformation heat treatment: After the steel is heated to austenitize and homogenize, it is quickly cooled to a selected value according to needs. Temperature, while it has not been decomposed and transformed, undergo a relatively large amount of plastic deformation, and then quench and temper while it is still austenite to obtain tempered martensite. This thermal deformation processing is followed by adjustment. The combined process of quality treatment, compared with normal quenching and tempering, can obtain higher strength at the same level of ductility and toughness). Spring products obtain high yield strength, elastic limit and high toughness through high temperature tempering. Therefore, it is widely used in important structural parts of automobiles, tractors, machine tools, etc., such as connecting rods, bolts, gears and shafts. The types of high temperature springs are generally divided into high temperature resistant compression springs, high temperature resistant tension springs, high temperature resistant torsion springs, high temperature resistant mold springs, high temperature resistant disc springs, etc. The materials of high temperature resistant springs are generally CrSi, CrV, Inconel high temperature alloy materials. The recommended high temperature is 400℃~650℃. Stainless steel materials can also be used for temperatures below 400℃. Choose suitable materials according to the requirements of use. 1. T631J1/T631 is used for heat-resistant springs and springs with high tensile strength after heat treatment; 2. 630 stainless steel is precipitation, quenching, martensitic stainless steel, and this grade has high strength, hardness and corrosion resistance, etc. characteristic. After heat treatment, the mechanical properties of the product are more perfect, and the compressive strength can reach as high as 1100-1300mpa (160-190 ksi). This grade cannot be used at temperatures higher than 300°C (570F) or very low. It has good corrosion resistance to the atmosphere and diluted acids or salts. Its corrosion resistance is the same as 304 and 430.
Shenzhen pogo pin manufacturers want to know what factors will affect the price? The factors that affect the price of pogo pins mainly include the thickness of the electroplating and the assembly method, the size of the pogo pin and the production process, etc. Of course, the pogo pins provided by different pogo pin manufacturers There is also a big difference in price, so if you want to buy a good quality and affordable pogo pin. 1. The assembly of the pogo pin connector. There are many forms of assembly of pogo pin connectors. For example, some are directly riveted with plastic assembly, and some have to add cap buckles on this basis. Different assembly methods have different prices. In addition, if you want to buy high-quality pogo pins, please go to a regular pogo pin manufacturer to buy products. 2. The electroplating thickness of the pogo pin. As everyone knows, the overall performance of the pogo pin with thicker plating is relatively better, and naturally its price is relatively higher. In other words, the thicker the plating, the higher the price, and the better the performance of the pogo pin. .