With the increasing demand for elastic yellow, the standard specification is also higher and higher, so the spring custom manufacturers use a variety of enhanced production process to improve the quality of elastic yellow! The common preventive measures to improve the damping characteristics of the projectile are: force quenching treatment and magnetic effect heating treatment.

Stress hardening refers to the release of tensile stress field equivalent to 30% ~ 50% tensile strength on both sides of the hardened stainless steel wire. Under the action of tensile strength, the stainless steel wire leads to trace element stress and dislocation line movement. At this point, the interstitial material's molarity atoms (C and N) spread towards the dislocation line depending on temperature, "pinning" the moving dislocation. In addition, the diffuse melting pearlitic in the whole process of quenching provides a lot of pinning points, so that the dislocation "pinning" more complete, more abundant, improve the plastic deformation resistance of stainless steel wire, improve the elastic reduction characteristics of stainless steel wire. The magnetic effect of current heating faster, stainless steel wire surface oxidation light, not easy to lead to nitriding, crystallization has been improved. The torsion spring made of quenched stainless steel wire is produced by oil heat treatment process of electromagnetic induction heating machinery and equipment. It has good plasticity and elastic reduction characteristics under static load and load.