REDUCING BLUING ON TITANIUM (NON-SUBMERGED EROSION)
TECTIP No. 003

   
SUBJECT:        Reducing bluing on titanium (non-submerged erosion)
APPROVAL:    Ken Baeszler
PREPARED BY:    Doug Nelson
SYSTEM TYPE:    Wire EDM


OBSERVATIONS:   

While eroding small titanium workpieces with intermittent surfaces, it is possible for the material to turn blue around the cutting zone. Although the bluing is largely aesthetic, it can be reduced or eliminated by taking the following actions:

 
ACTIONS:     

• Create User Technology, omitting the main pass (most heat created during these settings).
• The following technology changes are valid for a total of three (3) passes:

1. On the last trim, reduce offset .008um (.0003”).
2. Triple the fixed feed rate (VS) up to 10.
3. Run the “I” value at the lowest setting with a regulation of 22.
4. Alter the flush to Q of 13 and a bar pressure of .3.