Wear restisance?

A

Adamantium

Joined
Oct 3, 1998
Messages
355
I'm wondering what gives steel its wear resistance quality, usually I just relate it to the Rockwell hardness but I some how think I am a little off. Any info would be useful.

Sincerely,
Adam
 
Edgehopper, you are right, but the Rockwell hardness measures only surface hardness. Usually this is enough, but there are exceptions, notably 'hard facing' alloys, such as tungsten carbide (WC), and the cobalt alloys, which are the same hardness all the way through.

Rating these alloys on the Rc scale gives a misleadingly low estimate of how long they will last. For more reading, check out this web site: http://www.ccsi-inc.com/html-tech5a.htm it gives you the details of Rockwell testing and different scales therof.
 
Check out this site for a good dose of basic information about the steels we so often hear people chat about.

<A HREF="http://www.crucibleservice.com/cruts.htm">Tool Steel selection</A>

Sid
 
I don't think Rc tells the whole story even for yer plain ol' steels. 420V doesn't necessarily seem to be wear-resistant strictly because of its hardness. The presence of vanadium carbides is probably the culprit.

The presence of lots of carbides in an otherwise 60 Rc steel seems to give some wear resistance.

Whaddya think?

Joe
jat@cup.hp.com
 
Joe, couldn't agree with you more; you have several factors which tend to make CPM 420V more uniformly harder. The CPM process itself, which insures homogeniety of the steel (same compositon all the way through), certainly is a great help.

The 2.2% Carbon will cause more carbides than a lower carbon steel. The 13% Cr is also a good carbide former, but the 9% vanadium (V), the most of any knife steel of which I am aware, produces a great amount of those very hard V carbides.

I anxiously await my Kit Carson folder in 420V to put theory to actual testing.
smile.gif

 
Its in the mix.. Read about steel and the function. The cpm steel are very consistant.
The alloys that make up the steel have more to with the wear resistance.

------------------
Darrel Ralph / Bladesmith
Web www.infinet.com/~browzer
Take a look!!!!
 
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