To take advantage of metal plasticity at normal temperature, we apply the adjoining sets of specially made roller dies to have metal material changed in its shape. We use cold drawn finished round wires as raw material and we make the material go through our roller dies to roll and draw them so that we can form the materials into required shapes and sizes at normal temperature.
With regards to bright heat treatment, metals which have gone through cold plastic deformation processing will have their crystalline structure changed and hence get harder in quality (so-called work hardening), which creates difficulty to our further processing. Thus, for the purpose of having following processing and adjusting the hardness of material, it is necessary to recover the normal structure by heat treatment.
When implementing bright heat treatment, the equipment will be vacuum condition or fulfill protective air to avoid oxidation or decarburization on metal material. Because the material will not be oxidized, it is unnecessary to implement pickling procedure in following procedures. As the reason, our products can maintain delicate surface and fine roughness. Generally speaking, the roughness of our products will be within Ra 0.5μm／Rmax 5μm. Moreover, because the material will not be decarburized, if it is necessary to implement quenching and tempering in following procedure, the material can keep the consistency of hardenability.
During our production, combining cold-rolling, cold-drawing and heat treatment process in different numbers of times each according to the complexity of required shaped, we can form the shaped wires and bars step by step.