plating, anodizing, & finishing Q&As since 1989
Surface finishing of Titanium Ti-6-4
I am trying to locate companies who deal with surface finishing of Ti-6-4. We have surgical implant pieces with a surface of 125-250 micro and would like to get the finish down to about 60 micro. All I've come up with so far is companies who use vibratory tubs. Any suggestions?Ethan Fricklas
- Narragannsett, Rhode Island
Nitric acid and Hydrofluoric acid mixtures exhibit some chemical polishing capabilities. This is a dangerous mixture. Nitric-Ammonium bifluoride might do the same.
It is a long jump for chemical polishing to go from 320 to 60. It might not be possible.
I would call up Metal Coating Process Corp., they could give you information about electropolishing of Ti.James Watts
- Navarre, Florida
Achieving a 60 microinch finish on Titanium is not that difficult when using centrifugal barrel equipment and the appropriate media. In fact much finer surfaces can be developed if a process is used that has several cycles with successively finer abrasive materials. If the part shape lends itself to it, one of the newer processes available (Turbo-Abrasive Machining - TAM) has been known to reduce as-ground or as-machined surfaces to 20 Ra and below in cycles of less than 5 minutesDave Davidson
process labs - Bartlett, New Hampshire