Micro-polish of INCONEL/CRES probes

[B1ALT]

Does anyone have expertise with "Micro polishing" of CRES. The vendor says this is a proprietary process and will not disclose any details. These parts are very small inconel tubes braised to CRES 316L precision fittings. The process removes any micro burrs and also heat discoloration after the braising process, but also is causing undersize condition on 5/16 -32EF 2A threads.
Thank you

 

[ctopher]

I believe it is the same as electropolishing. Which is not a proprietary process.
We do this all the time with our parts and have not seen your problem. IMO, the vendor should work with you if they still want your business.

Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP3.1 / PDMWorks 05
ctopher's home site (updated 06-21-05)

FAQ559-1100
FAQ559-716

 

[MintJulep]

http://www.preciseusa.com/electropolishing3.htm

It seems like the threads could be masked.

 

[IRstuff]

Possibly, they are over-polishing.

Another possibility, particularly with small firms running at capacity is that their baths have not been switched out in a while, resulting in incorrect stoichiometry for optimum processing.

Similar effects occur with electrodeposition.

TTFN

 

[unclesyd]

I have to concur with the above post that the process is probably electropolishing. There are several variations incorporated into electropolishing that are held close to the vest by some firms.
The vendor should work with you on the problem regardless of his desire for secrecy. He should have you sign a confidentiality or secrecy agreement so the problems can be worked out.

Here is site that has a lot of information on the electropolishing process. This might help you in your discussions.

http://www.ableelectropolishing.com/

 

[Carburize]

It could also be one of the newer combined chemical-mild abrasive type processes such as that offered by REM and Timken.

 

[B1ALT]

I want to thank all of you for your information and websites, which I am now reviewing.

Regards