Need Help Troubleshooting Results

Hoss is right. Coupons for W2 or 1095 must be thinner than 1/4”. 1/4” will not though harden in P50.
 
Thank you Stuart and Hoss.

Hoss, I understand your point. I guess my reason is only that I wanted to use the same parent bar stock for testing as I used for forging the blades to limit variables. I fully expect thinner cross sections to cool faster and harden more deeply. But W2 is supposed to harden to a depth of .125" or so, no? Shouldn't I be getting proper hardness at least on the surface (if properly treated at correct temps)?
 
i4Marc said:
Thank you Stuart and Hoss.

Hoss, I understand your point. I guess my reason is only that I wanted to use the same parent bar stock for testing as I used for forging the blades to limit variables. I fully expect thinner cross sections to cool faster and harden more deeply. But W2 is supposed to harden to a depth of .125" or so, no? Shouldn't I be getting proper hardness at least on the surface (if properly treated at correct temps)?
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Try the edges of the coupon, the side with harden through close to the edge. The numbers will be inconsistent, probably, but closer than you will see in the middle.
 
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I had problems with their 1/4” 1075 as well Marc.
Even when normalizing and thermal cycling, the grain was huge. I had to go much higher and longer with normalizing temps.
I didn’t have a hardness tester at the time so I couldn’t check numbers.
 
i4Marc said:
OK, thanks Rob.

What is happening with the 1095? I am getting inconsistent results and not achieving the optimal as-quenched hardness. Does the NJSB 1095 suffer from the same issues as his W2 or am I looking at a different problem?
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No, the 1095 my shopmate had issues with was NOT from NJSB.
 
I have a deep oven that I can normalize bar stock in if you have a bunch and want it all reset at 1900°. Max length is 31.5”
 
Thanks JT. That is a generous offer. I can handle what I need at this point in my oven. I'll just cut 'em to 18" for now. :thumbsup:
 
Update:

Did hardness testing on my revised coupons. Still not hardening properly. My oven is malfunctioning. Temps shooting way past programmed target and jumping all over the place. Spoke with the engineer at Evenheat. He had to make a call to the manufacturer of the boards and will be getting back to me.
 
What controller are you using? I run an Evenheat with the Rampmaster control....mine holds good temp as per my digital thermometer.
 
i4Marc said:
Update:

Did hardness testing on my revised coupons. Still not hardening properly. My oven is malfunctioning. Temps shooting way past programmed target and jumping all over the place. Spoke with the engineer at Evenheat. He had to make a call to the manufacturer of the boards and will be getting back to me.
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Sometimes its not the steel. Frustrating to trouble shoot this stuff.
 
Just a thought.
I noticed no one has mentioned the procedure used to remove the steel from the oven and get it into the quench tank. Since 1095 has less than a second to clear the P nose, anything ,ess than immediate transfer will produce less than desirable results.
Jim A.
 
Carter, I have the Rampmaster 3 controller. The engineer says these are pretty reliable yet here we are.

Jim, My quench tank is right next to the oven. The coupons are removed from the oven and tossed into the tank as quickly as possible. I have a wire basket inside the tank which catches the coupons so they don't drop to the bottom of the tank. I can drop the coupons in and start agitating immediately.
 
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