Effect of triple quench

[mstephen]

I did the normalizing today with the same process,overheated the steel,and thermal cycled without the quench and it worked well also.I dont know which process you would would end up with less pearlite (ie more like the spheroized steel from the mill) ,which can make your belts dissappear faster.Ill have to read and do some more work.I dont read any of the magazines, you should practice seeing through people a little more yourself.Again,pretty childish.I came to this section to post something i thought others would find interesting and to learn from others,not to spread b.s(ive been a blacksmith since i was 18 and ive heard most of the crap people tout as gospel)Or to tell others what a magical process i had preformed or to butt heads over it.

 

[Nathan the Machinist]

Thanks for the explanations. I struggled to understand with my little english. I did have some very hard time of reading it all again and again. But I couldnt solve one paragraph:



What for the magnet used ? To check the irons critical point or something else? Mr Kevin, I know you have spent too much time to explain it all but can you or someone understood it explain a bit for me please?

Thanks
Emre

You are familiar with the idea of "getting under the nose" when quenching? Meaning, when hardening a steel, you have to quench it fast enough to prevent pearlite if you want to get martensite, right? Well, pearlite and martensite are both different phases of steel (that are not austenite).

So..

When you are thermal cycling steel, if you cool it too fast, you will get "under the nose" and not form pearlite (which is a good thing in a finished blade) you will still have austenite. But, if that happens you will then need to cool it down cool enough to form martensite, meaning taking it all the way to room temperature.

So..

So, when thermal cycling, if you cool slow enough you will get pearlite. That works. If you cool too fast you will not get pearlite so you will need to cool it to room temperature and get martensite. Otherwise you will still have the exact same austenite grains upon reheat and you will not be accomplishing anything. The magnet will tell you when you're getting a different phase other than austenite.

 

[A C Richards]

It is great this thread popped up again. I have been working on a couple of W-2 blades and during the grinding I noticed the blades were consuming discs at an alarming rate. I also noticed that there was obvious large grain and hard/soft layers in the structure. I had not done a correct normalizing after forging. I have been doing a normalizing just before HT. It has been working great until now. I decided to do a proper normalizing. I have been using my salt pot. I remembered this post and applied the concepts of a rapid normalizing. I did 3 cycles and it appears to have worked great. I finished the rough grinding with 2 discs, used up about 10 before. Also no visible grain difference. I will not neglect to do this process again. It is worth the effort.

 

[Kevin R. Cashen]

… I dont read any of the magazines, you should practice seeing through people a little more yourself.Again,pretty childish.I came to this section to post something i thought others would find interesting and to learn from others,not to spread b.s(ive been a blacksmith since i was 18 and ive heard most of the crap people tout as gospel)Or to tell others what a magical process i had preformed or to butt heads over it.

mstephen, I have repeatedly pulled you specifically out of the line of fire of my criticisms, I have gone out of my way to work with the sources you referred to in order to stay in your corner, and everything I have posted explains and verifies your findings. And when I saw I was too quick to step on a thread that was not mine I tried to back off. Yet in every post you now make you sling a personal insult towards me, and there is irony in your choice of names to call. I was wrong in how I handled myself in this thread, my only defense is that I lost my manners due to a belly full of the too often unchallenged nonsense surrounding this topic, and I know I am not alone in that affliction.

I came to this section to post something i thought others would find interesting and to learn from others…

Honestly? Because the more information that was added to the thread, the more hostile you became. If you actually despise the “crap people tout as gospel” or the “latest b.s coming out of peoples mouths about carbide banding making barstock into a crucible steel”, then we should be in total agreement and the hostility is very puzzling. I am not so obtuse not to see when I behaved like a bull in a china shop in somebody else’s thread, and I was on my way out the door when you took yet another shot at my back. As I said, the magic words have chummed the water and it may only be a matter of time before some warm fuzzy posts appear with all kinds of platitudes that are much more palatable; you will get validation, a great sales pitch, but not many explanations. How you react to that will make it easier for me to “see through people a little more myself”. Now why don’t you be good enough let me to get out of the way of that happy exchange?

 

[Kevin R. Cashen]

...What for the magnet used ? To check the irons critical point or something else? Mr Kevin, I know you have spent too much time to explain it all but can you or someone understood it explain a bit for me please?

Thanks
Emre

Emre, I will be happy to talk to you about any of these details, if you would like to e-mail me : kevin@cashenblades.com. But it may take me around 48 hours to answer since this will be the last time I will be checking out the forums at home and the next time will have to be between my studying very old blades in England.

 

[SShepherd]

Emre, I will be happy to talk to you about any of these details, if you would like to e-mail me : kevin@cashenblades.com. But it may take me around 48 hours to answer since this will be the last time I will be checking out the forums at home and the next time will have to be between my studying very old blades in England.

not going to be stopping by the british museum in
london are you?

 

[Fred.Rowe]

It was already demystified,... Kevin just triple demystified it.

This was a tung in cheek remark from me. I gave Kevin, some grief, earlier in the year, about not putting pictures in his post.
I explained to him, I can't learn without pictures Especially moving pictures; kinetic learning I believe its called.

He almost always includes them these days.:thumbup::thumbup:Thanks Kevin

The last thing that we need on this forum, where this great volume of information resides at the tips of everyone's fingers, is a Pixxing match that interrupts the flow of information.
I am speaking about all the information that resides here; not just Mr. Cashens.
It is truly voluminous, when you think about it.

So lets take a deep breath and consider the loss, to all those who come here to learn.

There are forums on here where you can always find a fight, if that is what you are looking for.:foot:

Fred

 

[mstephen]

Yes,the hostility you started without understanding why i posted was puzzling.At your back?Ok?You obviously have a lot of people that look up to you kevin for information and i would ask the next time someone posts you ask a few questions and let them explain before the hijack.As for not being insulting the "however i now have an idea that a certain magazine may be the place to find those" is an insult.Which it was intended to be.Im done.

 

[Fred.Rowe]

Yes,the hostility you started without understanding why i posted was puzzling.At your back?Ok?You obviously have a lot of people that look up to you kevin for information and i would ask the next time someone posts you lask a few questions and let them explain before the hijack.Im done.

This is a great site:thumbup: Don't give up on it.

This thread just got off to a bad start. No malice.

There is a great deal of information on this site; I would hope you would stay and share what you have to share with us.

Most threads go better than this, I swear:thumbup:

Fred

 

[Tai Goo]

This was a tung in cheek remark from me. I gave Kevin, some grief, earlier in the year, about not putting pictures in his post.
I explained to him, I can't learn without pictures Especially moving pictures; kinetic learning I believe its called.

He almost always includes them these days.:thumbup::thumbup:Thanks Kevin

The last thing that we need on this forum, where this great volume of information resides at the tips of everyone's fingers, is a Pixxing match that interrupts the flow of information.
I am speaking about all the information that resides here; not just Mr. Cashens.
It is truly voluminous, when you think about it.

So lets take a deep breath and consider the loss, to all those who come here to learn.

There are forums on here where you can always find a fight, if that is what you are looking for.:foot:

Fred

Now I feel all warm and fuzzy inside...

 

[Fred.Rowe]

Thats what I wanted to hear.:thumbup:

Fred

Empty your in box of PMs its full