焊线用ER307Ti线材表面重皮缺陷研究

Study on Surface Double Deck Cuticle Defect of ER307Ti Wire Rod for Bonding Wire

ER307Ti是一种焊线材料,使用普通保护渣铸锭后钢锭表面存在严重的鱼眼状缺陷、钢锭经热轧加工成线材,线材表面也存在大量的重皮缺陷,经过理论及现场生产研究,这是由于所用模注保护渣与ER307Ti的化性不匹配造成的,为此开发出一种新的模注保护渣,使用这种保护渣后钢锭表面鱼眼状缺陷及线材表面重皮缺陷完全得到了解决。

ER307Ti is a kind of bonding wire material;the severe fish-eye defect exists on the surface of steel ingot after using the ordinary covering slag ingots;the steel ingot is processed to become wire rod by hot rolling,a lot of double deck cuticle defect exists on the surface of wire rod,so the caused reason is found out by theoretical research and the field research,which is due to the mismatch between mold pouring protection slag and the chemical property of ER307Ti,therefore,a new kind of mold pouring protection slag is developed,so the fish-eye defect on the steel ingot surface and the double deck cuticle defect on the surface of wire rode can be resolved completely.