Cutting Edge Heat Treatment: Superbainite.

A

Atemporal

Joined
Aug 4, 2012
Messages
47
This is a lecture at the POSCO laboratories in South Korea where they discuss a new procedure for producing super hard, super tough steels. Basically, take a steel with a high carbon content (1%) and hold it just above the Ms temperature for about 3 weeks. Apparently it ends up as hard as martensite after quenching, but as tough as the austempered steel we hear so much about. If you're looking for the new space-age heat treatment, this is it. The good part runs from about 12:00 to 25:00.
http://www.youtube.com/watch?v=_gB7xAG3jow&feature=relmfu
 
We thought bainite for knives would go away ! Superbainite ? Anyway the stucture is lower bainite .I'll save myself the trouble to watch the video.Properties will be very close to martensite .However ask some factory production people and see what they say about waiting three weeks to HT the steel !! Try it if you like but it's not for me !
 
With a grain size @ 0.1 micron, an HRc @ 63, and a toughness surpassing many types of armour it might be worth it. The only disadvantage (ignoring the time aspect) is the lack of carbides.
 
this was mentioned by dudes in cambridges years ago. they play with some Co and Al to speed up the formation of supperbainite. i think they did made it 3day.

i would like to do it if i am still 20s, fool arround in the college to get a master degree. however i really think there is better stuff to do for these 3 weeks or days.
 
I'm not saying its practical. Not by a long shot! But I enjoy looking for ridiculous ways to solve problems in the spirit of "if its worth doing, its worth over doing." Bainite is mostly a fad these days among lovers of the tacticool, but it sounds like it could be close to ideal for some kind of big heavy bushcraft chopper, like a hatchet, machete, or kukri.

Its one of those things that if you have a salt bath and a lot of spare time it would be interesting to try once, but I wouldn't go out of my way.
 
alright, if you think you aim is "just do it" then anything is worth trying lol.

from what i learn. enough deformation to the austensite is able to speed up the formation of supperbainite. and it is better to do it at low temperature. there is a zone between C curve of P and Ms where austensite is relatively stable. if you can do enough deformation to the cooling Austensite in this zone. then the bainite might start form up faster in the later salt bath. you might need lead bath to avoid the C curve of P. you also need some good luck on that. lead poison is not just going to kill you. it also had a chance to make your dick never able to get hard again.
 
You must log in or register to reply here.
Back
Top