Low friction abrasive coating for steel?
Low friction abrasive coating for steel?
(OP)
I have an application where will have a steel (could be another material if needed) auger turning very slowly in sand. Need to have as low a coefficient of friction as possible, to reduce my load and torque requirements. Any suggestions on what to coat the auger blades with?
We tried a sample in the lab with a polished steel auger coated with a dry lubricant spray. Worked great initially, but quickly became very hard to turn - looks like the dry film was rubbed off and sand starting sticking. Hard to tell that the auger was even polished, as is now very rough after the abrasion and from the sand sticking.
Thanks for your help.
Brett Goldstein
We tried a sample in the lab with a polished steel auger coated with a dry lubricant spray. Worked great initially, but quickly became very hard to turn - looks like the dry film was rubbed off and sand starting sticking. Hard to tell that the auger was even polished, as is now very rough after the abrasion and from the sand sticking.
Thanks for your help.
Brett Goldstein





RE: Low friction abrasive coating for steel?
Richard I. Smallwood
Business Development Manager
Analytical Services and Materials, Inc.
107 Research Drive
Hampton, VA 23666
Phone: 757-865-7093
Fax: 757-865-7309
RE: Low friction abrasive coating for steel?
www.microsurface.com
RE: Low friction abrasive coating for steel?
Another option is TiN sputter coating, but this will only be a few microns in thickness. It will not require post-lapping. Many contract hoses deposit TiN and TiCN, etc., for cutting tools. I believe http://www.ticoating.com also performs CVD coating. This is much thicker than a sputtered film.
Have you tried case hardening?
RE: Low friction abrasive coating for steel?
Their products mainly increase the coefficient of friction, but there is one product that descreases it.
RE: Low friction abrasive coating for steel?
I work for a company (IonBond) that does both PVD (cathotic arc deposition, and sputtering) and CVD coatings. Depending on the size of and material used for your auger, either process could be beneficial. You can check out more at www.ionbond.com.
Also, thermal spray ceramics and carbides can be useful in these applications due to the ability to apply them thicker than PVD and CVD films.
Good luck,
Mike Nielsen
RE: Low friction abrasive coating for steel?
Good luck,
Malcolm
RE: Low friction abrasive coating for steel?