Oxide Scale of wire plays a role to protect wire from rust

but it also needs to be removed easily when pickling. The thickness of iron scale and its phase structure are the main factors affecting the removal or adhesion of iron scale. The effects of finishing rolling temperature and spinning temperature on the phase structure of φ12 mm SCM435 scale were studied by testing and analyzing the thickness and phase structure of oxide scale under different rolling conditions. The results show that with the increase of finishing temperature or spinning temperature

the oxide scale thickness of SCM435 wire increases

and a thicker oxide scale (about 20 micron) will be formed in a short time between 800 ℃ and 900 ℃. Because of the oxidation selectivity of Cr

the iron oxide scale has a high FeO ratio when the Rnishing temperature is above 870 ℃ and the spinning temperature is above 810 °C. However

when the spinning temperature is higher than 860 ℃

the change of phase structure tends to slow down

and the ratio of FeO does not change much.