What are the heat treatment techniques of spring pogopin materials.valutrode neurostimulation electr

　　Spring is actually a common part that needs to work on its own characteristics. Because parts made of elastic materials are generally deformed under the action of external forces, and their original state is restored after removing exogenous force. It is usually made of spring steel. Spring types are complex and diverse. They are divided into spiral spring, spiral spring, plate spring, alien spring, etc. The selection of spring materials shall be determined according to the spring load characteristics, stress state, stress size, working temperature, environmental medium, service life, conductivity and magnetic requirements, process performance, material source, price and other factors.

　　When determining the section shape and size of the material, the series size specified in the national standards and ministerial standards should be given priority, and non -standard series materials should be avoided as much as possible. Small and medium -sized springs, especially spiral stretching spring, should be given priority to reinforced steel wires, leaders and other warm -cold steel wires and oil stretching steel wires. Fatigue performance, simple processing, good craftsmanship, stable quality. Spring heat treatment enhancement technology

　　1. What are the thermal treatment techniques of spring materials?

　　(1) Protective atmosphere heat treatment: China is protected to protect the spring, oil quenching steel wire and wire diameter of less than 15 mm for protecting atmospheric heat treatment. The protective atmosphere heat treatment can eliminate surface decarburization and oxidation, and improve the surface quality of the material.

　　(2) Sensing heating or protecting atmosphere induction Heating heat treatment: This process is usually performed on the metal wire before the spiral spring formation. Some spring factories combine steel wire heat treatment with spring manufacturing to reduce costs. Sensing heating treatment is effective, and the sensing speed of the induction is fast, which is conducive to refining grains, reducing the surface decarburization, and fully exerting and improving the strength and toughness of the material.

　　(3) Surface nitride heat treatment technology: In recent years, high stress valve spring or other high -stress clutch springs have also adopted surface nitride technology to achieve reliable fatigue life. More advanced technology is low -temperature gas nitrogen exudation. The nitrogen seepage temperature is generally (450 ~ 470) ° C, and the gas seepage time of the gas is (5 ~ 20). Spring Jets Reinforcement Craft

　　(4) Combination spraying technology: Combination spraying balls are usually called multiple injection processes. The most economical method is to use secondary spray balls. This is achieved by using different diameter shooting bombs and spray balls. Larger particles are first used to obtain residual compression and surface smoothness.

　　(5) Stress injection technology: Stress injection balls are also a relatively classic jet process, but because it is difficult to apply to large -scale production, but in recent years, due to the rapid development of stress injection equipment, it has high production high in large -scale production high Stress car suspension spring has made great progress. In particular, the joint application of stress reinforcement and its spraying process has good enhancement effects. The prestressed stress on stress blasting is generally set at (700 ~ 800) MPAR. After the stress blasting, the residual stress peak can reach (1200 ~ 1500) MPA, thereby obtaining a higher fatigue strength.

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