Material for High Temperature Ballscrew

[BallscrewBob]

Hello all, I just joined this forum, hope I can contribute as well as get some direction.

I am a design engineer at a linear actuator supplier for aerospace applications, in particular ballscrew actuators.

We have recently seen a surge in the number of RFQ's for high temperature ballscrew actuators, one in particular I am working on currently will be operating in 700-800F though for a short time.

I am looking into possible materials and at this point have it narrowed down to 3-

Inconel 718
Waspaloy
A286

Thoughts, comments, suggestions, etc. would be welcome.

Thanks

 

[Metalguy]

My first metallurgical job was at a place that made ballscrew actuators for use at 900 deg F. The screwshafts were M2 tool steel, dry lubed w/electrofilm.

 

[metengr]

My only comment in reading your post is that you listed some high performance, Ni-base alloys that are normally used in high temperature applications. Waspaloy can be difficult to machine.

You did not mention or provide your specific design constraints and environment as a basis for alloy selection so if you need comments regarding alloy selection, it would probably be useful to provide this information.

 

[Goahead]

Would you be interested in exploring ceramic solutions?
Full ceramic and hybrid metal-ceramic bearings are available.

http://www.welding-advisers.com/

 

[EdStainless]

I would look at material like Airmet or tools steels before I went to Ni alloys. I would try things like CPM 9V, M4, or T15.
If you need some corrosion resistance look at 17-7PH or Custom 455 or 465.


= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.

http://www.trent-tube.com/contact/Tech_Assist.cfm