NiFe-Cu

The weld metal color exceptionally matches with cast iron, making it ideal for correcting casting defects on new components. It has a hardness of approximately 165 HBOK. The deposit can be made on both cold or slightly preheated materials. The weld metal offers excellent machinability characteristics. For castings with phosphorus contents higher than normal, around 0.20%, these materials are more effective compared to the ENi-CI classification. Practical experiences show that successful welds can be achieved on thick and highly constrained components, as well as on high-strength cast irons.

Electrodi con rivestimento speciale basico-grafitico e anima in lega di nichel e rame.

La struttura dipende dalla composizione chimica e dalla velocità di solidificazione e successivo raffreddamento.

Utilizzato per le normali qualità di ghisa come le ghise grigie, duttili e malleabili e per unire pezzi di lavoro di vari tipi di ghisa, compresa la ghisa nodulare, e per saldarli all'acciaio e ad alcuni metalli base non ferrosi.

Remove the fusion crust from the welding area by machining, grinding, chipping, or suitable methods. When repairing fusion defects, carefully remove defective metals from the base piece. Remove grease, oil, dirt, or foreign matter with suitable solvents. If the casting is oil or solvent-impregnated, apply heat until they evaporate; generally, 400 °C is sufficient. In cases of high grease presence, quickly heat the area to about 540 °C for elimination. The use of preheating is not always necessary but often preferable. Preheat to 200-350 °C, cool gradually post-welding, and maintain an interpass temperature between 350-450 °C to prevent cracking. In large castings, opting for intermittent welds can promote uniform temperature distribution, keeping the casting hot but not excessively so.