Spring steel smelting ensure the metallurgical quality

Now sold on the market types of spring steel belt is very rich and varied, this is because the smelting technology of the strip is different, so the finished product type is also different. Spring steel belt mainly can be divided into hot rolled, cold drawn steel, cold rolled steel belt, etc. But no matter what kind of steel belt, only guarantee processing technique of stability can guarantee the quality of the finished product. The so-called good steel strip are those of high purity, low content of sulphur, phosphorus, oxygen, nitrogen, etc, steel uniformity, stability, very good steel belt. For spring steel belt, surface quality and dimensional accuracy and life has a great influence on the performance of the spring, because spring steel delivery state except surface shot peening surface no longer carry on the processing, and therefore the work of the finished spring surface, various defects on the surface of the original is left to the spring. Very high so the spring steel surface requirement, the decarburization, crack, and scarring, inclusion and layered extremely strict restrictions. Various surface defects can make the spring early damage, shorten life. Hot spring steel, round steel, square steel, flat steel, etc. High surface quality of steel, can be hot rolled or after heat treatment state delivery, delivery to ensure that the hardness shall not exceed the specified value, is advantageous for the spring. Hot rolled material can be made from cold spring, with strong for cross section size made spring after heating. Spring forming again after tempering after quenching, the temperature, and in order to obtain higher showed and good comprehensive mechanical properties. A: what kind of heat treatment of steel belt good performance