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Talked to an old timer at a hammer-in last weekend who said he quenches in canola oil at exactly 130 degrees and I've been just guessing temps for 4 years like a fool.
He said anything hotter than 135 and you risk cracking the steel on a deep quench but too cold and it won't harden right, has anyone else actually bothered to measure their oil temp or am I the only one winging it?
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alice_gonzalez965mo ago
Man, I feel your pain. I went four years just dipping blades in whatever temperature the oil happened to be that day, usually straight out of the garage in winter which was probably 50 degrees. Swapped to heating it up on a hot plate and actually checking with a thermometer and it was night and day difference, stopped getting those weird soft spots near the edge. I was honestly embarrassed how much better my results got just from that one simple change.
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uma_patel195mo ago
Four years in a cold garage dipping blades in 50 degree oil? That's basically cryo-treating on a budget. Bet your neighbors thought you were running some kind of weird winter survival school from the shed. Swapping to a hot plate and thermometer probably felt like discovering fire for the first time.
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