Tungsten carbide or silicon carbide? Which is the better option?
Tungsten carbide or silicon carbide? Which is the better option?
(OP)
In a direct impact erosion application which wouild be the better option: tungsten carbide or silicon carbide tiles? The application is in a pulverised coal pipline at a splitter section where we have been experiancing high wear on the nose piece of the splitter. We've got the above two tiles to choose from. which one should we choose ?? or Is there a better solution available?





RE: Tungsten carbide or silicon carbide? Which is the better option?
Hope this helps. Get back to me if you want more info.
RE: Tungsten carbide or silicon carbide? Which is the better option?
RE: Tungsten carbide or silicon carbide? Which is the better option?
RE: Tungsten carbide or silicon carbide? Which is the better option?
have you tried to plasma spray.
i feel the best result could be obtained by using a nitride bonded SiC powder.
coating can be either with plasma or HVOF although my personal preference is for plasma operated at >mach2 speed.
regards
naddir
RE: Tungsten carbide or silicon carbide? Which is the better option?
Tom
RE: Tungsten carbide or silicon carbide? Which is the better option?
You may be well advised to check that you are using the correct grade of silicon carbide as there are several different types. While I could write pages on the different types, I think it would be more beneficial to point you to http://www.azom.com/SearchResults.asp?MatKeyWord=silicon+carbide, where you can find the relevant information.
RE: Tungsten carbide or silicon carbide? Which is the better option?
Long ago in a far off place called Dunbar,West Virginia.
I was employed by a company then known as
Delta Services.
WE worked on Bird centrafuge type filters and
we had a similar problem with the discharge
ploughs,they were made of cast stellite. They
lasted about 2 weeks. We worked with some good
people from what was then called Combustion
Engineerings Ceramics Div; I have no idea what
they are called now. We used tiles of Alpha
Silicon Carbide to armor ploughs of stainless
steel....life went up to about 6 weeks.
Which is just about the best you can do
considering how blasted erosive a coal slurry is.
Try that.
Warmage
RE: Tungsten carbide or silicon carbide? Which is the better option?
An engineering grade reaction bonded silicon carbide would be more wear resistant than Tungsten carbide in puverised fuel blowing applications in which silica grits are present, as long as the conveying velocity is less than 80 metres per second.
RE: Tungsten carbide or silicon carbide? Which is the better option?
True, of course.
However Sandy Stewart at Mississippi State has done a nice job separating 'wear' into four mechanisms. His work is in wood and I am not sure how it relates to coal but it does give food for thought.
Mississippi State University Forest Products Laboratory
P.O. Box FP
Mississippi State MS 39762
Tom
RE: Tungsten carbide or silicon carbide? Which is the better option?
RE: Tungsten carbide or silicon carbide? Which is the better option?
Did you get info on the ASM symposium on hardmetals and related materials past, present & future? Pittsburgh, October 2003. There is a call for papers out now. I am on the committee would really like to see papers explaining industrial applications or predicting industrial applications. SiC in wood would be fascinating.
tom
RE: Tungsten carbide or silicon carbide? Which is the better option?
No, I haven't received info on the ASM symposium on hardmetals and related materials past, present and future. I've not much experience of SiC in wood wear applications; alumina ceramics seem to do the job quite well, at the moment. Using RBSiC's, like RESILIDE, in wood applications, unless it is for high temperature/corrosion applications, would be like using a sledgehammer to crack a nut. RESILIDE is an expensive, but top of the range ceramic.
RE: Tungsten carbide or silicon carbide? Which is the better option?
For direct impact, erosion resitance will be a function of both hardness and fracture toughness. High-grade SiC is harder than WC. Cemeted WC is tougher than SiC.
RE: Tungsten carbide or silicon carbide? Which is the better option?
RE: Tungsten carbide or silicon carbide? Which is the better option?
Also there are other binders than just cobalt and there are new technologies such as reinforced WC, binderless WC and similar.
Tom