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Old 05-14-2020, 7:27pm   #1
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biggrin heat treating-- oil quenching fire at work
Today's excitement was provided by Jim. Had a number of parts made out of O-1 tool steel that needed to be heat treated. The "O-1" signifies that it must be quenched in oil.

Jim designed a wire basket to fit in the pail of oil.

So Jim heats up the parts for the required amount of time at 1600*F in the furnace. Using his high temp gloves, he takes the wire basket out of the furnace and goes to submerse them in oil.

But there is a "slight" problem with Jim's basket design. The heat made the top of the basket wider so the red hot parts are only touching the surface of the oil. Instant flame about 6' high and excessive amounts of smoke

The one sheetmetal guy saw what was going on and used the fire extinguisher on the parts and flaming oil.

Jim filled most of the shop with heavy smoke. Lots of fans going and doors open

Everything is fine and nobody got hurt

Here's one song that fits

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Old 05-14-2020, 7:43pm   #2
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Ooops...
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Old 05-14-2020, 7:49pm   #3
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Ooops...
BIG ooops

Normally when quenching, you get a second or two of flame as the parts are submersed.

As Jim discovered today, red hot parts ignite oil in a flash of the eye.

So the wire basket is caught and Jim is trying to hammer down the one corner to get it to drop in without spilling the oil. It didn't work as planned
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Old 05-14-2020, 8:37pm   #4
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Damn sure know the deal....
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Old 05-14-2020, 8:50pm   #5
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Damn sure know the deal....
But this was epic
even bigger than a gazebo roof fire
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Old 05-14-2020, 8:54pm   #6
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Corvette: Anything else is just transportation.
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Old 05-14-2020, 9:52pm   #7
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Hate it your thing is too big to fit in the hole.
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Old 05-15-2020, 6:53am   #8
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Hate it your thing is too big to fit in the hole.
take your time, it will fit
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Old 05-15-2020, 7:46am   #9
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We had a guy badly bend the tow bar on a jet engine transport trailer. He took it upon himself to fix it. Got a torch and heated it red hot and bent it back straight, then poured oil on it to quench it. Wooooff instant flames and smoke threatening to catch the jet engine on fire too.
Luckily others were smart enough to grab fire extinguishers and put it out.
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Old 05-15-2020, 9:49am   #10
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Like the song and performer
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Old 05-15-2020, 9:53am   #11
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Old 05-15-2020, 10:06am   #12
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Well you guys did not run into a major problem.

Some idiot tried playing forged in fire in Cohoes NY a couple years ago and ended up causing one hell of a fire. Took out close to 3 blocks.
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Old 05-15-2020, 10:18am   #13
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Well you guys did not run into a major problem.

Some idiot tried playing forged in fire in Cohoes NY a couple years ago and ended up causing one hell of a fire. Took out close to 3 blocks.
Cinder blocks, or square city blocks??
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Old 05-15-2020, 10:33am   #14
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Hit on a couple different blocks, not just cinder! A major fire for sure!
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Old 05-15-2020, 7:12pm   #15
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Originally Posted by JetMechZ16 View Post
We had a guy badly bend the tow bar on a jet engine transport trailer. He took it upon himself to fix it. Got a torch and heated it red hot and bent it back straight, then poured oil on it to quench it. Wooooff instant flames and smoke threatening to catch the jet engine on fire too.
Luckily others were smart enough to grab fire extinguishers and put it out.
At work we make the aluminum tubes for for moving the jets around on aircraft carriers.

In fact, I start the next batch of 150 pieces ( 4" tube about 12-1/2' long) on Monday. New govt inspector so all the old "make it works tricks" must be thrown out the window since we have a new inspector
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