I've been having trouble re-heat treating used factory-made knife
The problem has been discussed here before but I've got a new-clue
and wondering what anyone here might know about it.
The other day, re-heat-treated an old-factory-knife blade made from
1095 and it worked out great! :) But the knife had hardly been used
(it was like new) ...other than being at least 20 years old.
Could it be hydrogen from exposure to foods that's messing me up on
the other old 1095 knife blades?
The fracture grain size is large and the grain boundries seem to be
very weak. A finished knife blade made from that stuff can't be
sharpened, no kidding, it's like trying to sharpen a brick.
I don't have trouble re-heat-treating my-own-heat-treated 1095.
Also I don't believe it's the original steel's P content, I've had
trouble re-heat-treating old-files too and it's for sure not because
of high P when dealing with those.
What do you think?
Also from my reading I'm not finding information (good or bad) about
austenitizing martensite. Does that make any real difference?
Alvin in AZ
ps- XX=panix ...for those that can't post to newsgroups
16 years ago