Ferro-Titanit® carbide-alloyed materials, tool steels and cemented carbides are subject to the same influences during spark machining. The overall behaviour when spark-eroding Ferro-Titanit® tends to be similar to that of tool steels.
Since spark erosion leads to more or less severe, negative influences on the surface of tools, depending on the amperage applied, Ferro-Titanit® should be finish-eroded using a low pulse energy. Spark-erosion roughing should be followed by a finishing operation and a superfine finishing step, in order to obtain the least possible surface roughness and maximum freedom from cracks. Spark erosion must be followed by reworking and, if possible, stress-relieving treatment to eliminate the stresses occurring due to melting and re-solidification.