Call for Charpy toughness samples

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The tempering curve only goes down to 200C, so you can’t see the drop from as-Quenched hardness. The large y-axis also helps make it look flatter.
 
Larrin said:
The tempering curve only goes down to 200C, so you can’t see the drop from as-Quenched hardness. The large y-axis also helps make it look flatter.
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It’s a good thing I posted. I though that was in farenheight.
 
Vanax austentized at 1975, cryo, 300f temper came out at Rc62 on my tester. The new indenter came today, but it’s not threaded. I have to either thread the indented, or bore out the shaft on the tester. Recommendations anyone?

Vanax at this hardness is harder to grind than 3v, but not as had as z-wear. I’m looking forward to using the test blade.
 
I took the afternoon to make a new table for my bandsaw. Aldo”s 1084. Normalized and thermal cycled. It's in temper now. The sheet metal stock one warped when a pipe fell on it. I should be able to cut much closer to final size with the new table.
 
I finished making a "jig" for my disc grinder that will allow me to grind the samples to the right sizes and within tolerances (.001" on thickness, .003 on width/ length.) Turns out this was a BIT more complicated than I had initially thought, but I learned a lot in the process. Like how to run a fully manual 1928 Bridgeport Mill, and what "tramming" is... :)Jig1.jpg Jig2.jpg Jig3.jpg Jig4.jpg Jig5.jpg Jig1.jpg Ready to cut, heat treat, and now grind some samples!
 
Another update in steel availability. I ordered some steel for some upcoming projects, and chuck threw a few more bars in for testing.

FE08FD23-FFD4-405A-A9A5-BA89A8728F6B by Wjkrywko, on Flickr

The 80crv2 might be a bit thin, but I’ve got some 0.125” stock here already. There’s 0.010 to come off of each side, so it might be ok. This steel doesn’t need the thermal cycling, so the extra decarb won’t be an issue.

I’m still cutting out V4e and M4. I killed my bandsaw blade on rex121 this weekend. Got new blades today.

Thanks Chuck!
 
I’ve got 1084, 1095, O1, and 52100 tempering right now. I have V4E and 4v samples cut out to heat treat tomorrow (in addition to the three conditions I already did.). 3v is cut out too, and I’ll heat treat tomorrow.

Vanax and Rex121 are done. By the end of the weekend, vanax, Rex121, V4e, 4v, 3v, O1, 52100, 1095 and 1084 will go off for grinding. The new bandsaw table and blades are really helping. I should have upgraded years ago.

Next will be M4 and z-tuff. We are going to do a lot of conditions in M4 to tease out hi and low temper. Stormy (skillgannon) is going to do half of the M4 samples (2100f and up, while I’ll do 2050f and below) and add to the M2 samples I did before (I did 2100f, hi and low temper. Stormy will do 2200f and 1975f. Iirc.) I have several more steels to work through yet. Upcoming is L6, 80crv2, D2, more 8670, 440c, s90v, elmax, and A11.

We don’t have any S35VN, or cpm154 in the works yet. CpmD2 would be interesting as well.
 
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I have some S35VN. I just ordered another stick. Think about what you want me to try and I will run it with the test blades.
 
Willie71 said:
I’ve got 1084, 1095, O1, and 52100 tempering right now. I have V4E and 4v samples cut out to heat treat tomorrow (in addition to the three conditions I already did.). 3v is cut out too, and I’ll heat treat tomorrow.

Vanax and Rex121 are done. By the end of the weekend, vanax, Rex121, V4e, 4v, 3v, O1, 52100, 1095 and 1084 will go off for grinding. The new bandsaw table and blades are really helping. I should have upgraded years ago.

Next will be M4 and z-tuff. We are going to do a lot of conditions in M4 to tease out hi and low temper. Stormy (skillgannon) is going to do half of the M4 samples (2100f and up, while I’ll do 2050f and below) and add to the M2 samples I did before (I did 2100f, hi and low temper. Stormy will do 2200f and 1975f. Iirc.) I have several more steels to work through yet. Upcoming is L6, 80crv2, D2, more 8670, 440c, s90v, elmax, and A11.

We don’t have any S35VN, or cpm154 in the works yet. CpmD2 would be interesting as well.
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I don't want to be rude , but looking in this chart and seeing how precise temperature is important and what happens with very little temp.change I wonder does your Evenheat , Paragon or whatever commercial HT oven you guys use are capable to do all this steel ?? Steel like Vanax , S90V Rex121 , M4 ?? To make charpy toughness samples and make test you MUST be sure that steel is HT 100% in right way ....or result of all this test will not be 100% valid and useful ?

hXtEFoM.jpg
 
OK my friend , carry on . . . . I have nothing more to add :thumbsup: HT in Evenheat and Tempering S125V in toaster oven is very scientifically :D
 
Natlek said:
OK my friend , carry on . . . . I have nothing more to add :thumbsup: HT in Evenheat and Tempering S125V in toaster oven is very scientifically :D
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The equipment is not as important as the knowledge and experience to use it.

I find you argumentative here on the forum despite your lack actual knife making experience.

Hoss
 
DevinT said:
The equipment is not as important as the knowledge and experience to use it.

I find you argumentative here on the forum despite your lack actual knife making experience.

Hoss
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You are wrong DevinT , I can make any knife in any steel you pick ,that part is easy .What I can not is to HT any steel ...steel like this one https://www.crucible.com/PDFs//DataSheets2010/M4 Data Sheet.pdf
BW , last two years I read almost everything available on net about heat treat ovens and I think I know exactly what I'm talking about . . . HT M4 steel in Evenheat oven is joke !!
 
Natlek said:
You are wrong DevinT , I can make any knife in any steel you pick ,that part is easy .What I can not is to HT any steel ...steel like this one https://www.crucible.com/PDFs//DataSheets2010/M4 Data Sheet.pdf
BW , last two years I read almost everything available on net about heat treat ovens and I think I know exactly what I'm talking about . . . HT M4 steel in Evenheat oven is joke !!
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So everything you know about heat treating and heat treating ovens you have learned from reading the internet and not from actual experience. Right?

Hoss
 
DevinT said:
So everything you know about heat treating and heat treating ovens you have learned from reading the internet and not from actual experience. Right?

Hoss
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Depends what you call internet , if you think on you tube is one thing :D Yes from reading books, just as I get my education.............from books! You should try that too ....reading science . Out there are tons of research for HT steel and different HT ovens from proven institutions ans scientists . You can not sell to me that story , sorry ! Reading and learning is first , that way you can learn what you need ....And when you have what you need to HT M4 Steel , it is easy to follow protocol from Crucible or to make own test ..or they know nothing too , they are on internet ... common you exactly know what I'm talking about ! I m done here ....carry on with toaster :thumbsdown:
 
Natlek said:
Depends what you call internet , if you think on you tube is one thing :D Yes from reading books, just as I get my education.............from books! You should try that too ....reading science . Out there are tons of research for HT steel and different HT ovens from proven institutions ans scientists . You can not sell to me that story , sorry ! Reading and learning is first , that way you can learn what you need ....And when you have what you need to HT M4 Steel , it is easy to follow protocol from Crucible or to make own test ..or they know nothing too , they are on internet ... common you exactly know what I'm talking about ! I m done here ....carry on with toaster :thumbsdown:
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You are a troll and will continue to argue. Reading is one thing and doing is another.

That is hilarious to suggest that I am the one that should do more reading. You continue to prove that you know very little about knife making and heat treating.

If you don’t like this thread, then stay away from it.

Hoss
 
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