DIE-SINK EROSION FOR COPPER ALLOY MATERIALS
TECTIP No. 004
  
SUBJECT:    Die-sink erosion for copper alloy materials       
APPROVAL:    Ken Baeszler
PREPARED BY:    Zack Medlin

OBSERVATIONS:   

Copper Alloy metals are generally considered difficult to erode. The copper content generally leads to increased electrode wear and slow cutting speeds.  To counter these effects, follow the actions listed below.  Common copper alloy work pieces are: brass, bronze, beryllium, copper tungsten and Ampcalloy.

ACTIONS:     

• Use negative polarity technology (copper to copper).
• Increase the number of electrodes required to complete cuts at least threefold.
• If necessary, increase offtime and voltage to reduce overheating of materials.
• Common electrode materials are: fine copper graphite, normal graphite, copper and copper tungsten.