Che 507 is the code name of covered electrode, a brand in Sichuan, which meets the covered electrode standard of low-sodium hydrogen low-alloy structural steel in China. The brand number is J507 and the model number is E50 15.
J507 covered electrode does not contain arc stabilizer, so it can only use DC arc welding machine [AX series arc welding generator, ZX5 thyristor and ZX7 inverter] to carry out reverse polarity welding on important structural parts such as Q345R and 09Mn2 (the grounding wire is clamped at the negative electrode and the electrode holder is connected at the positive electrode), which requires high toughness, crack resistance and plasticity of the weld. Before welding, it shall be dried in covered electrode drying furnace at the temperature of 250~300℃, preheated for 1 ~ 1.5 hours, and then placed in covered electrode insulation cylinder for 0.5 ~ 1.0 hours. covered electrode can take it as needed, and the heating times shall not exceed three times.
High carbon steel refers to iron-carbon alloy with carbon content greater than 0.6%, which is difficult to weld. According to the requirements of the specific base material brand and service environment of high carbon steel, before choosing a suitable welding process, heat treatment methods such as preheating before welding, heat preservation after welding and slow cooling must be carried out. It is impossible to work out the specific welding process only by the word "high carbon steel".