Re: Tungsten carbide

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi all,
        As I've said in the past, I've had excellent results with 
tungsten carbide. I'm amazed to see there are so many different 
"flavours" available. So what type do I use I hear you ask? Well, I 
get my gap electrodes made by a local toolmaker who carries some 
stock, presumably for making cutting tools. I know it will be pretty 
hard stuff. I will ring them later and if I can find out which type 
they use, I'll post to the list.

Malcolm


On 22 Sep 2001, at 22:07, Tesla list wrote:

> Original poster: "brian by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ka1bbg1-at-mcttelecom-dot-com>
> 
> Hi, also some of the powder mixes are sometimes coated with exotic materials
> as a particle coat and when melted(sintered and pressed) that material now
> adds another propietary mix surely not to be announced.
> i do know if it was made by Tan-Tung then it will have tantalum and tungsten
> mixture and few other materials. tan-tung usually isnt magnetic(the way i
> find tan-tung cutting tools) when mixed with other tool steels. it also cost
> substantially more. There are more TCarbide mixes than we realize, most are
> propietary,there must be 1,000's of recipies. cul Brian f.
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Friday, September 21, 2001 2:34 PM
> Subject: Tungsten carbide
> 
> 
> > Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <ludev-at-videotron.ca>
> >
> > Hi Terry, Marc, list,
> >
> > May be I have an explanation other than solder diffusion of why
> > some have good success with tungsten carbide electrode and some
> > have poor result ( erosion ).
> >
> > TC are kind of ceramic composed of a variety of different
> > material and proportion of TC content vary from 98% to as low as
> > 60%. Some used titanium carbide as addition, from what I know
> > titanium have poor reaction to arc.
> >
> > In conclusion TC are made of WC, Ni, Co, Cu, TiC, Fe, etc. in
> > different ratio.
> >
> > See these link:
> >
> > http://www.generalcarbide-dot-com/grades/
> >
> > http://www.chinatungsten-dot-com/ctcgp.htm
> >
> > http://www.leechcarbide-dot-com/grade.htm
> >
> > The question is what is the best grade of TC can be use as
> > electrode? What is the best binder; nickel or cobalt? What
> > proportion of WC is the best? Probably the higher, other material
> > are added mostly for lowering the brittelness of the TC.
> >
> > I think the question could be ask to an association of mfr. of
> > TC, I'm sure one of you with a better english writing ability
> > than me  could write to them, I think of a kind of list of the
> > best grade to the worst because may be the kind of shape we need
> > for electrode are not produced with the best grade for resistance
> > to arc erosion.
> >
> > Cheers,
> >
> > Luc Benard
> >
> >
> >
> 
> 
> 
>