Fused vs. crushed Tungst. Carbide grit.

[janeriksen]

What will be the difference between these options. Does the fused grit have a superior wear resistant? And will the different be good enough to justify the double price of the crushed?

 

[blacksmith37]

Does "fused" mean sintered with Co /Ni binder ? And "crushed" is loose grit? Depends what you want to do with it.

 

[janeriksen]

I need something with good wear resistant in contact with species of rock.

 

[tomwalz]

Broken or crushed will be all sorts of sizes with sharp points and sharp edtges.

Better get a definition of fused from the supplier.

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.

 

[unclesyd]

I maybe missing something. From my point of view the same as posted above you are talking about WC2 with a binder and WC2 grit as in sand, two entirely different animals.

What do you mean by contact, is it rubbing, wear to a part or impacting, removing the rock, the certain species of rock?

A little more information would be extremely helpful.

 

[janeriksen]

Crushed grit is made of old mills and inserts which are crushed and sieved into different sizes. I´m not sure what the fused is but I think it must be grit that is produced in the same way as inserts, but only smaller.

It needs a good resistant when rubbing to rocks like those we have in our mountains and are building our house on.

 

[tomwalz]

I was talking about WC

Sharp edges cut faster but dull faster.I don't think you want to cut the rock but rather break it.

If you are removing rock yourself, you might check first to see if you could find a rental unit. Might also check out mining bits. However these are mostly coal mining.

As stated above, crushed carbide is most likely to inserts, knives etc. designed for cutting. These have a grain struture designed for holding an edge in cutting. This pretty far on the carbide spectrum from mining bits. Mining bits are designed to be tough and not sharp.



Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.

 

[redpicker]

Tungsten Carbide is available in two different forms for addition to weld puddles to produce a hard, wear-resistant overlay. Either cast/crushed or sintered pellets.

The cast/crushed is generally harder (it has no binder) but is very angular and contains sharp edges that will agressively cut any steel it comes into contact with (such as casing). The cast/curshed also has a higher melting point, so it will dilute less in the weld pool during application.

The sintered pellets are a little softer, but are rounded, so they will not be as agressive. They do have a lower melting point and will dissolve a bit more in the weld pool.

Either one is considered very hard and will provide resistance to wear against rock. For maximum wear resistance, use cast/crushed, but understand that it will tear-up any casing it is run in.

rp

 

[tomwalz]

You don't necessarily want hard in rock. Hard will shatter, chip, spall, fracture,etc. You want a lot of toughness.

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.