W2 Heat Treat graph?

[John L]

Does anyone know where to find a W2 heat treat graph.....not correct word.....but a graph that shows tempering temps and R hardness scale? Thanks

 

[Stacy E. Apelt - Bladesmith]

ASM Heat Treaters Guide

Called a TTT, CCT, or ITT graph.

Here are a lot of them:
http://images.search.yahoo.com/search/images?_adv_prop=image&fr=mcsaoff&va=TTT+diagrams+for+steel

This should cover it:
http://images.search.yahoo.com/imag...i=119qf7bnk&sigb=13t3fqfi3&.crumb=2OQr4gmnK37

 

[mete]

He's looking for a tempering curve . Approximate for 1.0 % C tool steels ,water quenched - 400 F -63 HRc , 500F-59, 600 F -56, 700F -51.

 

[Stacy E. Apelt - Bladesmith]

Sorry, I missed that.
The TTT graphs and the coursework is still a good read.

 

[John L]

Thanks to both Stacy and Mete. I am now heating to 1475, quench, temper blade two times two hrs at 375 and tempering springs at 800. This is for slipjoints. Think it'll work? Seems to so far after three knives. Springs are working well at 800....but don't know R of blade. Would guess very close to 60..Anyone?

 

[jdm61]

The TTT graph for W2 can be a bit scary from what I have heard. They use thicker samples that our piddly little knife blades and I was told that the graph would seem to indicate that it is pretty much impossible to cool W2 down fast enough to totally through harden the test piece.