The Damasteel Got Here !!!!

I did Mete - The #5. I tried to get a good picture today but can not get a good enough close up by holding the recomended 8 inches distance. I'll just have to do it the way I had before. I will say this: I did not get the clockwise / counterclockwise break structure but still did get the same type highs and lows. I am not there yet on the HT. That I DO believe. Patience. I am HT'ing one now. I will soak 25 min., AL quench, cryo, double temper. This one I will shoot and post - for sure.

Mete, I have saved all but #4 (see CORRECTION below). Afterwards I can mail all them to you for an expert view. I think that would be a good idea and now I wish I had not discarded #4 (see CORRECTION below).

CORRECTION: It is #3 I had thrown away. I DO HAVE #4.

This one, #6 goes into cryo now (9:00PM EST Sunday). It will be there until tomorrow evening when I get back from deer hunting. Then one immediate temper. Depending; I should know something some time Tuesday.

RL
 
HT #6 :
--------
Foil wrapped

Ramp w/steel in oven

1400 F. / 7 min.

Ramp w/steel in oven

1950 / 25 min.

AL Plate Quench w/steel in foil

Cryo: 17 1/2 hr.

Double Temper: 450 / 2 hr. per
--------
Rockwell after temper #1: 63.5
Rockwell after temper #2: 62

http://riflestocks.tripod.com/steelgrain4.html

What think please ?

RL
 
That's what the hardness should be , that's what the fracture should be. Roger I'd like to thank you for for you efforts ,I'd like to see all bladesmiths do the experimentation. That's the way to learn. I'll have to promote you to junior scientist.
 
Gosh !! Junior Scientist ! Me on the GrayMaker site ! I like this.

It ain't done yet. I still want to do the same as #6 except one with air quench and one with temper before cryo. So we might want to stay tuned a little longer.

Dan, I'll write it up again so its a little more concise and specific. I'll email that to you. I was in a hurry to get it posted and I wrote so that those that have been following along would understand what it was I did.

I'll start the air quench version of #6 tonight.

Thanks a bunch to both of you and again to Mete for his professional help in helping me learn something about fracture analysis.

Dan, the pic showed up from your webite for me - just fine. Its probably something I left out of my HTML that prevents it from working with all browsers. I'll email you the HTML for that page and the JPG. Maybe you can advise me on what I may have written wrong / HTML.

RL
 
Roger
it was the site that wouldn't open..
It's working now and
I snaged the picture and will host it
in case you want to drop it sometime..
anytime on the edit and add more if you like..:)
 
Thanks Dan. I'll try to get a re-write of the #6 procedure to you this evening but I will also be posting results of the next two HT's. As stated, the only difference will be: one is air quenched, the other is temper before cryo (don't know yet which quench will be used on that one).

Do you think I need not email you the HTML for your thoughts on it?

RL
 
Roger
I'm thinking you could use the same quench as the other
it will take one variable out of the mix. :footinmou :)

your site is ok now?? so you can e-mail the stuff or
I can take it from here which ever way is OK with me. :)
 
Dan, yeah - I am leaning toward doing the temper before cryo with a air quench. It all depends on whether the AL plate quench tested superior. It will be the better of the two or if both appear similar it will be the air quench.

YES, lets use your site as the master reference for this. You are building a good reference library on it and its best for all that way. I will probably leave the pics up though in case someday down the road the thread is looked at; so the pics will still be there for them.

RL
 
Thanks a BUNCH for all your work, Roger.

Very interesting stuff.

I'm just lurking on the thread but enjoying it.

Steve
 
Sample #6A:

#6A: Same as #6 EXCEPT that it was rapid air quenched (#6 was aluminum plate quenched). #6A got a 14 hour deep cryo. #6 got a 17 1/2 hour deep cryo. All other things about HT are equal right down to the times and temperatures.

Rockwell for this one - #6A: 62 HRc (same as the plate quench)

Fracture pic: http://riflestocks.tripod.com/steelgrain5.html

I still have a lot to learn about analysing steel fractures. In a way I think it looks good and then - well, I don't know enough about it yet. What think ?

RL
 
Which side did you check hardness on ? There is a difference in texture from one side to another.Should be the same. I like 6A better.
 
Roger would you mind heat-treating some ATS for me? I will only have a few at a time. I will pay.
 
Mete, I Rockwelled both ends but just looked and realized I had only tested one side. I will test the virgin side and report back ASAP.
BTW, do you mean 6A you like best or #6 ? 6A is the latest one - the air quench.

Bruce, you could have knocked me over with a puff of air. You bet I will :). Not just because you are a freind of mine but also because it won't hurt me one bit for it to be known I HT'ed some blades for a MS. Let me know when and don't back out on me.:cool: I am scared but excited about the oppurtunity to HT for a MS.

RL
 
Mete, I just tested both ends (halves) of the virgin side of #6A (the latest HT - air quench). I got 62 twice on each end and 62.5 once on each end. I'd call it 62.

Please verify which HT you like best. I want to use the better of the two quench methods for the next one, temper before cryo. Also please advise as to wether temper twice after cryo or if one temper after cryo is sufficient (the temper before cryo test).

Mete, I neglected to mention a piece of info about #6A. Rockwell after first temper was 62.5 - 63 HRc. But was 62 after final temper. This is different from the #6 (plate quench) were it tested 63.5 after first temper but also tested the same as #6A (air quench) after final temper. It is little details like this that might help one such as you see something about the procedure.

Thanks Mete and I feel myself very fortunate to have you advising me and analysing my results, long distance as it is but non the less extemely valuable. PS, I expect not to be here this evening beginning after 1:00PM EST.

RL
 
Sorry for the confusion, I mean I like #6, the aluminum quench. Took apart my deer , new knife works fine,now off to take apart a turkey, it's a very knife day.
 
in a few more minutes
I'm going to try out some more 154cm
on a deer :D and have some beer :D
dinners all over and all is well:cool:

I hope you all had a good Thanksgiving day....
 
Roger Ive come to respect your attention for detail and to do it right whatever time it takes. I think you are very knowledgable about air quenched steels, much more than me. Just because I muttled my way through the ABS tests doesnt mean I know everything. I still get requests from my customers for Stainless knives and Paul charges about 72 bucks min. I only have a few at a time. I susspect others have the same trouble making a large batch of 20 at a whack. I dont do production work.
 
Mete,

I am currently in second temper after cryo of #6B. This is the same as #6 except temper before cryo. After pre-cryo temper I got 58 HRc. I cry'd 18 hours. After first temper after cryo I got, again, 58 HRc. I will break the piece after final temper and post it this evening. I like very much lessoning the chances of micro-fractures by tempering before cryo but the final hardness needs to come up. My big question for you is this: how low in temperature would you feel comfortable in snap tempering this steel before cryo and preserve some reasonable protection against thermal shock fracturing? I have not been snap tempering these test pieces and all tempers have been 450 F. / 2 hours per. I can always go to 400 F. but I am comparing these hardnesses to test sample #6 which is 62 using the same temperatures. So, we are loosing 4 points by tempering before cryo and I would like to try one with a snap temper.

Thanks. RL
 
You must log in or register to reply here.
Back
Top