Calculating Carbide Volume

[Hawky]

Probably more for Larrin than anyone else but open to anyone.

I've looked at the formula for calculating predicted edge retention and would like to have a play around with some numbers.
However I don't know how to calculate the various carbide volumes to input into the formula.

Any links or pointers on how to achieve this?
Using 26c3 currently but would like to be able to do it for other steels too.

Thanks in advance

 

[Larrin]

You can't. You are limited to the carbide volume numbers provided in the table. 26C3 has about 8% M3C.

 

[Hawky]

You can't. You are limited to the carbide volume numbers provided in the table. 26C3 has about 8% M3C.

Thank you for that.
So in the equation:
TCC (mm) = -157 + 15.8*Hardness (Rc) – 17.8*EdgeAngle(°) + 11.2*CrC(%) + 14.6*CrVC(%) + 26.2*MC(%) + 9.5*M6C(%) + 20.9*MN(%) + 19.4*CrN(%)

M3C isn't an option, which means that only hardness and edge angle need to be factored in for 26c3. Is that correct?

If so then that gives a predicted TCC of 351mm when edge is 30 degrees (as per the test) and hardness is increased to 66hrc, at the extremes at 68hrc and a 24 degree edge the predicted TCC jumps to 490mm.

That does fit with my much more rudimentary testing of the steel, further proving the worth of your formula.
Thanks again.