High-temperature spring Pogo Pin
The structure obtained by high-temperature tempering of high-temperature spring is tempered sorbate. The heat treatment combined with quenching and high-temperature tempering is customarily called quenching and tempering treatment to improve the strength, hardness, plasticity, and toughness of the spring. The tempering temperature is 500-680℃, and the sorbate 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. At the same time, it can make some high-alloy steel (such as high-speed steel) with secondary hardening effect secondary hardening. Its disadvantages That is, the process is more complicated, and the strength will decrease while improving the plasticity and toughness.
Thermomechanical heat treatment can now 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 and austenitized at the same time, it is quickly cooled to the selected value according to the demand. Temperature, while it has not been decomposed and transformed, does a relatively large amount of plastic deformation, and then quench and temper while it is still austenite to obtain tempered martensite. This thermal deformation process is continued. The combined process of quenching and tempering treatment, compared with normal quenching and tempering, can achieve higher strength at the same level of ductility and toughness). The spring product has been tempered at high temperatures to obtain high yield strength, elastic limit, and high toughness. 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 usually divided into high-temperature resistant compression springs, high-temperature resistant extension springs, high-temperature resistant torsion springs, high-temperature resistant mold springs, high-temperature resistant disc springs, etc. The material of high-temperature-resistant spring is usually CrSi, CrV, Inconel high-temperature alloy material. The recommended high temperature is 400℃~650℃, and the temperature below 400℃ can also be stainless steel. 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. After heat treatment, the mechanical properties of the product are more perfect and can reach a compressive strength of up to 1100-1300mpa. This grade cannot be used at temperatures higher than 300°C (570F) or extremely low. It has good corrosion resistance to the atmosphere and diluted acids or salts. Its corrosion resistance is the same as 304 and 430.
