05-04-2022, 04:52 PM
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#1186
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義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
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Quote:
Originally Posted by NoHaveMSG
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Haha... nope. Oh well. 
Quote:
Yeah, most other alloys I am not familiar and only know a little about, it is all similar in reading the phase diagrams but some require more specific quenching and tempering procedures. Some like 440C I think need a non reactive atmosphere or you start pulling impurities out of the air. I mostly deal with high carbon alloys like 5160 and 1095 which are pretty simple, the quenching window is just a bit narrow. 1525F is ideal, 1600F and above will cause it to quench crack, below 1500F you start to fall out of phase.
It's funny you call it a dark art @Ultramaroon. I was just talking to our GM about it a couple weeks ago about the "feel" to it and how we just can't through anyone back in the shop. It's not like we really use temp guns back there, if you know you know. Differentiating between the color when heated just comes with experience and wanting to know the happenings behind it.
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That's what I'm talking about! Real expertise.  
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