Quantcast

Steel straightness

Kitchen Knife Forums

Help Support Kitchen Knife Forums:

RRLOVER

Senior Member
Joined
Mar 10, 2011
Messages
1,137
Reaction score
10
This is a newbie question.I ordered some cpm154 and it came pretty bent up.Does being a PM steel have any effect on trying to straighten the steel out,if I even what to try......I just hate to return stuff,such a PITA!
 

l r harner

Banned
Joined
Mar 6, 2011
Messages
548
Reaction score
0
i had only found one place that had bent up cpm154
i was forced to use it cause it was the last sheet i could find when crucible folded up
you can lightly tweek it and get it how you want but you are many times jsut better off HTing it and keeping an eye on it then and straightening it at that point
 

Marko Tsourkan

Senior Member
Joined
Mar 1, 2011
Messages
4,964
Reaction score
29
By the time I cut and profile blanks, some are not perfectly flat. I straighten by eye, sometimes I bang it a little bit on an anvil (gentle taps) and use a granite plate to check flatness.
 

mhlee

Senior Member
Joined
Feb 28, 2011
Messages
1,787
Reaction score
0
i had only found one place that had bent up cpm154
i was forced to use it cause it was the last sheet i could find when crucible folded up
Didn't Crucible reopen after being purchased following bankruptcy?
 

l r harner

Banned
Joined
Mar 6, 2011
Messages
548
Reaction score
0
yes tthey did but it left me with a nearly 2 year gap of hunting steel till they got more out to the supply houses (i am now happy to be working with the XHP steel and the great folks at cartec tho i have to buy from SB metals )
 

l r harner

Banned
Joined
Mar 6, 2011
Messages
548
Reaction score
0
my plan is to still work with cpm154 as its good steel too but the XHP is just a cleaner steel (onece you get to it in my old stock) like i said the new stuff is much better preped
there is even talk of some of the off shoot alloys that will be based off the XHP base alloy to add jsut a bit more carbide formers
 

Boatbuilder

Banned
Joined
Nov 20, 2011
Messages
12
Reaction score
0
Now that I have a surface grinder I will surface grind each knife after I profile it.
Jim
 

Mike Davis

Senior Member
Joined
May 2, 2011
Messages
1,521
Reaction score
0
I have a 12 ton press (hand pump) that i use if i cannot get them straight by hand, just make sure to run a normalizing cycle before you HT, or that warp could haunt you.
 

Marko Tsourkan

Senior Member
Joined
Mar 1, 2011
Messages
4,964
Reaction score
29
Now that I have a surface grinder I will surface grind each knife after I profile it.
Jim
You can straighten just about any steel by hand or overbending it in a vise before heat treating. Check on a granite plate for straightness - I make several small adjustments rather than one big, and check for straightness on a granite plate. I tap on a blade for clinking - that tells me if there is any bend on the blade that an eye might not register.

A magnet chuck on your surface grinder will flatten your blank, and even if you surface grind it, that bend will still be there.



M
 
Top