Galvanized black wire tensile strength, high hardness, in the process of rolling flat, galvanized black wire per unit volume longitudinal movement resistance increases, elongation decreases. The unit volume of galvanized black wire moves laterally to smaller resistance, and the width increases. On the contrary, galvanized black wire is easy to lengthen longitudinally, and its width is reduced. This is the production of galvanized black wire hardness is high and easy to width, hardness is small, easy to stretch out the width of the reason. If the tensile strength deviation of galvanized black wire is large and the hardness uniformity of galvanized black wire is poor, the width difference of the rolled billet is large, which will seriously affect the quality of the billet.
Galvanized black wire in the rolling process, if the surface of galvanized black wire is rough, the relative friction coefficient of galvanized black wire and the roll increases, the friction resistance increases, the elongation of galvanized black wire decreases, and the width increases. Production with the weight of leather material easy to wide, is because of its surface is rough. On the contrary, the surface of galvanized black wire is smooth, because the friction resistance between galvanized black wire and the roll is small, it is easier to elongate and the width is smaller. Domestic galvanized black wire in order to prevent rust, the surface is coated with butter, such as the removal of butter is not clean, easy to slip when rolling flat, but also affect its width.
The higher the carbon content of galvanized black wire, the worse its plasticity, the smaller the section compression and elongation of galvanized black wire, galvanized black wire in rolling deformation is difficult, smaller width. For the alloy galvanized black wire, because the alloy elements dissolved in the solid solution can improve the galvanized black wire cold work hardening rate, its deformation resistance, rolling width is small, and easy to crack.
Translation software translation, if there is any error please forgive.
Post time: 01-06-21