| 摘要 |
PURPOSE:To obtain a coated arc welding electrode which provides good productivity and exhibits superior welding workability by coating a coating material prepd. by kneading a coating raw material contg. iron powder of specified fluidity at a prescribed ratio together with a binder on the outside circumference of a mild steel core. CONSTITUTION:A coating raw material contg. iron powder of 19-33sec/50g fluidity (JIS Z 2502) at 25-60wt% based on the entire weight of the coating material is kneaded together with a binder. Thence, this kneaded mixture is coated on the outside circumference of a mild steel wire, whereby the intended coated arc welding electrode contg. iron powder is obtained. Slag forming agents, arc stabilizing agents, deoxidizing agents, etc., which are known heretofore are properly selected and used for the other components of the coating material. For example, water glass is used as the binder. |
