TUNGSTEN CARBIDE COATING
TUNGSTEN CARBIDE COATING
(OP)
I have been doing some research on coating tungsten carbide. I have some applications that we will be supplying equipment into. If I coat the equipment I have a choice of Stainless Steel or High Carbon Steel. I have been doing some research on which would be better. Can anyone tell me if there is an advantage of coating TC onto CS vs SST?
Thank you
Thank you





RE: TUNGSTEN CARBIDE COATING
http://www.carbidetechnologies.com/questions.php
RE: TUNGSTEN CARBIDE COATING
Plus can I confirm you are looking to coat mystery Carbon Steel or Stainless Steel parts with Tungsten Carbide - in your post you talk about doing the opposite as well.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: TUNGSTEN CARBIDE COATING
RE: TUNGSTEN CARBIDE COATING
AFAIK, Tungsten Carbide is actually a fine powder, mixed and sintered into a solid in a metallic matrix like cobalt, if memory serves.
I am aware that it can also be flame-sprayed onto steel or stainless, producing a rough, abrasive, and abrasion resistant coating whose thickness is typically much more than a few mils and whose thickness is difficult to control. (I am told that a friend of a friend had his cloth-covered 3-ring binder flame sprayed with WC, and it wore through three pairs of jeans before he realized what was going on.)
There is a more common coating for ferrous metals, TiN, which does not stand for the element tin, but for the compound titanium nitride. It is commonly applied to cutting tools for abrasion resistance, and commonly arrives in a shiny golden color. Perhaps you were thinking of TiN. ... or perhaps you should.
Mike Halloran
Pembroke Pines, FL, USA
RE: TUNGSTEN CARBIDE COATING
RE: TUNGSTEN CARBIDE COATING
To get things to stick really well requires that the surface be activated. Typically this requires etching the surface by submerging it or flooding it in a witch's brew of acids. Then washing in distilled water. Then you have a relatively short time to apply your coating before the passive film starts to develop again.
What that often means is that a small flat coupon sample prepared in a laboratory performs brilliantly. Passing all imaginable tests.
Then production parts fail miserably.
Carbon steel is much more forgiving, although not immune too production screw ups.
So what this really means is that you have to do your homework. Understand your application. Your loads. Your stresses. Your parts.
Test real parts, make to real production quality levels, under real conditions.
RE: TUNGSTEN CARBIDE COATING
Coating with WC (Tungsten Carbide) as a flame sprayed material leaves WC grains in some sort of a matrix, maybe a Stellite(c) or similar. This is very common on dirt moving equipment (The crude lines and /or cross hatching you see on some buckets and blades is one example.)
Lots and lots of variables all the way through.
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: TUNGSTEN CARBIDE COATING
With a component like a screw auger that has complex surface geometry, it can also be difficult to get good adhesion and uniform coating thickness over the entire part surface with flame spray or D-gun.