temper 1095

franklin

franklin

Well-Known Member
i hardened then temperd a hunting blade 1/8 thick edge to a dime at 425 1 hour 2 times and it snaped at less than 10 dagrees i even checked the blade after heat was sanded down to 600 gritt nothing looked bad does this sound right never has happened before but i am useing new qeunch mix i came up with
 
It's a little hard without actually seeing the blade. First of all I'd extend the tempering cycles to two hours and do it three times; there might have been some retained austinite, or more likely, some untempered martensite left over. What did the broken ends of the blade look like? If the steel had a course appearance then you have a problem with grain growth that needs to be corrected. If it has a satiny appearance then the grain was fine. Then there is why were you trying to bend the blade? Also, did you do a differential hardening or tempering? If you were trying to do the bend test from the ABS testing method remember that it is a test of being able to make a blade with a pearetic spine and a martensetic edge that will not completely fail when bent to 90 degrees. It is also a test to distruction, the hardened edge will break, so I wouldn't test a blade by bending it unless I was intending to destroy it.

Doug Lester
 
this is how i do it


1095
slow heat to 1475 , soak for 4 to 5 min bigger blade , smaller blades 3 to 4 min.
Oil should be 130 to 140f. Park#50
Temp @450 2 times for 2 hours at a time, with cool-down between
vern
 
yes i was trying to destroy it my problem is it snapped so fast it had good grain structure(satin) my thing is i can normally get 30/35 dagree bend before it snaps no diff heat
 
I would agree with Doug and V6 on the extra tempering. If the blade is smaller it will break easier when you bend it. it just doesn't have enough area to make the bend or distribute the stress like a bigger blade........Steve
 
thanks guys for the input i think i found the problem it was the oven the temp gauge was reading higher than real temp so i tempered higher in different oven and it was to high thats how i figured it out v-6 thats why my blade turned bright blue
 
You must log in or register to reply here.
Back
Top