Prep for first CPM 154 HT ( RC tested AGAIN)

Ok peeps...
I took it back today to the lab after work and talked to the same guy.
I asked him to test it on the tang... He had his doubts... Said the angle would not make a difference.
I told him I'd pay again if same results.
He was back within 10 min. He said he did it himself and it can out right at 59 twice.

So I am pleased with that... I'm sure if I would of used LN I could of got that extra point.
I am very happy with the results and will keep with the recipe.

Thanks for all the input and the offers.
 
$40 to do a hardness test !!!! I think I'm in the wrong business. I have paid less than $40to have steel analyzed. Most shops will do it for free, or a six-pack of brew.

Surely there is a maker near you in Missouri with a hardness tester.
 
Matt... I tempered at 425 for 2 hours twice.

Stacy... I think there was a member here by the name of John.. From what I gather, who also made slippys.
But haven't seen him post.. I seen him by just doing searches in the form for this and that.
Also don't know if he had one or not.

I've been looking for used ones in my price bracket with no luck.

I'll go exactly by the recipe I followed and have one tested every now and then to keep quality controll in check.😃

Do most people test every blade?
My tested one got two marks on the tang near the pivot hole that I won't be able to get out.
One might be able to be seen in the open position. They are not on the face side.
 
I test every blade and if some one questions a diamond indention you can attest to it being from Rockwell hardness test that you verified the hardness.
 
Did you soak at 1950 or what? The specs are 1900-2000 so I shoot for the middle. Maybe go 25 degrees higher next time and use forced air while in the plates.
 
On CPM or even Ats, I soak at 1975 for 40 min. Plate quench 1 1/2" thick aluminum 4" wide x12" long.
I consistently get 61+ with dry ice and alcohol, and 61-62+ with LN. I draw right around 400 or just a hair
less. I draw springs at 1135-1145 and get 47-49. Anything you want tested, if you send it and pay return
shipping to yourself I won't charge you anything. My hardness tester is a big bench model and reads dead
nuts with the calibation plates.
Ken.
 
kc custom said:
On CPM or even Ats, I soak at 1975 for 40 min. Plate quench 1 1/2" thick aluminum 4" wide x12" long.
I consistently get 61+ with dry ice and alcohol, and 61-62+ with LN. I draw right around 400 or just a hair
less. I draw springs at 1135-1145 and get 47-49. Anything you want tested, if you send it and pay return
shipping to yourself I won't charge you anything. My hardness tester is a big bench model and reads dead
nuts with the calibation plates.

Ken.
Click to expand...

Thanks for the offer...
I'll take you up on that👍

I'm tempering my spring now at 1125 for 2hours x2
 
From what I hear, ovens can vary from unit to unit. It will take a few tries to figure out what works best in yours. Next time at 1950 and force air for 1 minute while plate quenching and you may pick up another point or two.
Taximanny said:
Soaked at 1925
Maybe I'll kick it up to 1950 on the next.
Click to expand...
 
kc custom said:
On CPM or even Ats, I soak at 1975 for 40 min. Plate quench 1 1/2" thick aluminum 4" wide x12" long.
I consistently get 61+ with dry ice and alcohol, and 61-62+ with LN. I draw right around 400 or just a hair
less. I draw springs at 1135-1145 and get 47-49. Anything you want tested, if you send it and pay return
shipping to yourself I won't charge you anything. My hardness tester is a big bench model and reads dead
nuts with the calibation plates.
Ken.
Click to expand...

Kc custom when you say you draw a 400 do you mean temper at 400 twice for two hours??
I haven't got the lingo down yet.
 
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