Thread: web site and learning

Charlie (Spazola) does some really nice work! I know that both Mike Blue and I were quite taken with his design, workmanship, and ingenuity.

The results of the hardness tests were surprising because they said that a shaving edge can be attained at other than 58-65 HRC.
Mike also suggested an approach that will probably be useful for the both of us since we do not have a Rockwell testing machine.

More posts on Charlies visit to come.

Charlie, your link is amazing and absolutely inspirational. I never imagined making my own razor, and probably still won't find the time to do it, but I will definitely repeatedly look at your website for inspiration just to remind myself of the possibility that maybe, just maybe, I could do it!

Thank you!

I forgot to say that your razor is simply gorgeous. The curves are beautiful!

great post, very inspiring!

That was very cool, nice frame back too. Funnily enough when I clicked the videos, they all said that the video was no longer available, yet they still played, they were just rather dark.

I decided to try a different browser too see what happens. Seems my earlier problem lies with FF3.

Originally Posted by Milton Man

What would you do differently with regards to heat treating next time?

After talking to Mike B, I think that I will start tempering at a lower temperature, and let the blade soak for a little bit longer at critical temperature. I will also pay closer attention to the time getting from the forge to the quench.

I felt that the file did not bite into the metal last time, so I think that the problem is the tempering.

I am still in the process of trying to figure this out and perform the task with the tools that I have.

Charlie
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OLD_SCHOOL

I am not sure why the pages are not displaying right, I am not very tech savvy. I they seem to display right in Opera and Firefox.

If any computer literate people have any ideas about the page it will not hurt my feelings tell me what is wrong.

Thanks

Charlie

Thanks!

C utz

fantastic job, and thank you for showing us you process. save the monkeys?

Thanks for the reply - I was wondering...although I have a question - in Josh Earl's "My Heat Treating Processt" thread, he says he tempers his blades at 400F-425F...which is the temperature you used? Is it because the steel is different that you need to use a lower temper temperature?

Sorry for all the questions - this is really fascinating!

Mark

Originally Posted by Milton Man

Thanks for the reply - I was wondering...although I have a question - in Josh Earl's "My Heat Treating Processt" thread, he says he tempers his blades at 400F-425F...which is the temperature you used? Is it because the steel is different that you need to use a lower temper temperature?

The first variable is that the blade was "saw steel". Without knowing exactly what the steel is, there are possibilities injected into the whole process. This doesn't mean it's a bad steel, just unknown. I think it was a great place to start. Run the heat treatment, then test. If it's not where you want it to end up, re-treat and test again. Maybe several pieces each with a slightly different tempering temperature until the hardness is consistently where it's wanted.

In this case, the first possibility was that the tempering temperature was too high and reduced the hardness. So, we go to a lower temperature next time, maybe make five more blades, harden them all the same and temper one at 300 F, and each subsequent blade 25 F higher.

If the pattern starts to show that the top limit of hardness is say 54 with a tempering temperature of 300F, then perhaps it's time to look at the austenitizing temperature, perhaps, letting the steel soak a little longer over several blades, then back to the tempering routines until another highest hardness number develops.

If that's not good enough, then maybe the quench will have to be evaluated and a faster quenchant considered. Oil is a very safe choice up front and will produce good hardness in many unknown steels. But, maybe a faster oil or even water will have to be evaluated.

Last, this obviously takes time and effort and multiple blades to "write the data" for this unknown. Sometimes that can be a lot of fun, or seen as a waste of time and the next steel will be a known item and require less of this experimentation. Although, I have to admit, that for each new batch of steel from the mill, even though I have spectrographs of the analysis of the alloy, I still run a similar heat treatment regimen to make sure that the alloy will perform as it should.

It's a good example of what some of us have to go through. Just in case anyone thought that this was easy...