Hard plating

Try plasma coating with carbides as for cutting tools or other combinations of carbides (WoC,TiC....). There are also some hot jet platings for wear parts used in civil eng. systems/tools. Your application is more an abrasive wear situation and the particles might be rather big (relative way of speaking) so the most similar application is in handling of earth as in civil eng. machines. Wear is depending on the hardness and structure of the wear surface. Carbides are best for such situations.

Have you thought about the possibility to put a wear part as protection for the shaft so that you have not to change/repair the shaft but only to change the wear part thus reducing the maintenance time and increasing the machine availability? If you have a set of 2 protections the only production loss is the time to change the worn protection with the one in reserve.

I would appreciate if you have results to know more about.

Thanks. It sounds right.

I will check it out.

Have you considered Stellite? Many years ago the Indian Motocycle Co. used a Stellite shoe to maintain proper tension on the primary chain of their big bikes. I once worked in a shop where I saw a few of these. Twenty years of service (and more) would produce noticeable wear, but I never saw a broken one. Stellite is expensive, and its use is discouraged in nuclear power plants, but it's really hard and tough.

http://en.wikipedia.org/wiki/Stellite

Thanks. I will check it and let you know.

Stellite can also be flame sprayed or is available in arc welding rods for surfacing. It would be my 1st choice but it will be a pain if you need to machine the shaft after covering it with stellite.

Did you ever wounder why you had to change and adjust so many chains.

Hello,

Spraying might not offer the best solution because of layer thickness and bond strength. Plasma is better and you can get thicker layers.

We have very good results in quartz sand with WC and with bimetallic wear resistant products. Both solutions offer significantly longer life time than CrC hardfacings.

If you still haven't solved this problem you can contact me at info@vorax.hr.

Regards!
www.vorax.hr