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| Analysis and improvement of drawing fracture of ER70S-6 welding wire steel |
| CAO Lei 1,GUO Feng 2,JI Wenjie 1 |
1. Steel Rolling Mill, Jiangsu YongGang Group Co., Ltd., Zhangjiagang 215628, China；
2. R & D Department, Jiangsu YongGang Group Co., Ltd., Zhangjiagang 215628, China |
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Abstract ER70S-6 welding wire rod broke during the fine drawing process. The microstructure of the wire rod was observed. The results showed that the drawing fracture of wire rod was caused by the abnormal microstructure, which could not deform synergistically with the pearlite + ferrite microstructure in the drawing process. Therefore, the cracks propagated and the fracture was caused. By controlling the segregation of components in the continuous casting process and optimizing the controlled rolling and controlled cooling process in the rolling process, the abnormal microstructure had been effectively decreased.
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Received: 08 December 2021
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