(1) Heat treatment intensification technology of opposite spring manufacturers

Protective gas 1) protective atmosphere is used in the heat treatment of steel wire and toughened steel. In China, wire rods less than 15mm of the hetero-spring manufacturers, oil quenching tempering atmosphere heat treatment. Protective atmosphere heat treatment can eliminate surface decarburization and oxidation and improve the surface quality of materials.

2) Induction heating or protective atmosphere induction heating heat treatment. This process is usually carried out on the wire rod formed by the spiral spring manufacturer. Some spring manufacturers of the opposite sex put the heat treatment of the wire material together with the production of the opposite sex spring manufacturer to reduce the cost. Induction heating treatment has a good strengthening effect. Induction heating has a fast speed, which helps to refine grain and reduce surface decarburization. It can give full play to and improve the strength and toughness of materials.

3) Surface nitriding heat treatment technology. In recent years, high stress valve spring manufacturers or other high stress clutch spring manufacturers in order to achieve a reliable fatigue life, also use surface nitriding technology, now more advanced technology is low-temperature gas nitriding technology, general nitriding temperature is 450-470℃, gas nitriding time is 5-20h.

(2) Shot peening and strengthening process of opposed-type spring manufacturers

1) Combined shot peening technology. Combined shot peening, also known as multiple shot peening process. Most economical processes are secondary shot blasting. By using different diameters of shot peening to achieve. For the first time, larger pellets were used to obtain residual compressive stress and surface finish.

2) Stress shot peening process. The stress shot peening process is also a classic shot peening process, which is difficult to be used in mass production. However, due to the rapid development of stress shot peening equipment in recent years, it has been greatly developed in the mass production of high stress automobile suspension spring manufacturers. In particular, the combined application of stress - enhanced shot peening and other shot peening processes has a good strengthening effect. The prestress of stress shot blasting is generally set at 700-800mpa. After stress shot blasting, the peak value of residual stress can reach 1200-1500mpa, thus obtaining a high fatigue strength.

(3) opposite spring manufacturers of thermal compression process. Thermal compression process is mainly used in the spiral anisotropic spring manufacturers with high resistance to permanent deformation, as a senior anti-permanent deformation of the stabilization process. The thermal compression process can not only improve the resistance to permanent deformation, but also improve the fatigue life.