Study on forming and controlling technology of iron oxide for low carton free cutting steel rod

Abstract This paper introduces the process and mechanism of iron oxide in the rolling process of low carbon and sulfur-bearing free-cutting steel rods, and studies the influencing factors of oxide forming thickness and structure control by analyzing the forming characteristics of various oxides. To control the wire oxidation scale, which is conducive to pickling and drawing in downstream processing, we optimize and control the rolling process, by reducing the spinning or curling temperature to 900-950°C, reducing the amount of oxide sheet, controlling the thickness of the oxide sheet, and improve the overall quality of oxide sheet. The oxidation thickness of low carbon sulfur-free cutting steel wire rods can be controlled at 20-28 um.