What should consider about the heat therapy for spring steel wire?

Through the spring steel wire production, you should look at a lot. As a manufacture committed to making spring steel wire, we list some consider points of steel wire's heat treatment.
Until the heat treatment of spring steel wire, the two main points you should pay attention to: first, the rolling top of the spring steel wire usually would be the surface of the spring, so you need to try to avoid the racks, folds, spot scars, hair patterns, bubble, and many others. Second, the surface decarburization of spring steel wire will cuts down on spring's fatigue strength, so you should strictly tested the depth of decarburization in accordance with the provision.

Since we should notice until the treatment of spring steel wire, additionally, it should be noted after the heat treatment. First, take notice of the spring's surface with naked eye or perhaps a magnifying glass, to ensure there are no cracks, no corrosion pits, no serious quenching distortion. Second, ensure that the hardness and uniformity of spring steel wire are conforming on the provisions. During the mass production, you can even examine the hardness of spring steel wire by sample survey. Third, the metallographic structure ought to be troostite or the combination structure of troostite and sorbite. Forth, following assembly of spring, the spring needs to be tested about the permanent deformation under load and static deflection.

The spring steel wire after treatment can do the good performance. The inappropriate heat treatment will influence the performance of spring, so pay more attention.