It's color coded - when you've exhausted the usefulness of the quench, it'll shift color from blue to green. Will harden mild steel to Rockwell 42-45 (in spite of common wisdom that says you can't harden mild steel). Don't quench anything with more than 45- 50 points of carbon. Stir it up to get it moving before you quench. The salt in the water raises the specific heat of the water and draws the heat from the steel faster. This prevents any oily residues from the fire from forming a "heat shield" surface layer.
Wetting agents prevent the "skin" from forming.ĭetergents do a somewhat similar job, they're emulsifiers allowing oils and water to mix.
QUENCHING A RAILROAD SPIKE KNIFE FULL
In a quench, steam will form a similar surface "skin" and prevent full contact with the water, insulating the steel from a proper chill. This is surface tension trapping a layer of air, it makes a fair heat shield. We've all dipped a cold piece of metal in water and seen a bubble-like "skin" form with dry metal under it. They break down the surface tension of water allowing it to make contact with a material. It allows the salt in the mix to start attacking it as soon as it hits the air - make sure you have a LOT of clear water to rinse in ready at hand. Jet-Dry (or whatever you use for a rinse agent) does something chemically to the surface of the steel. Well 'nuff of that stuff, here is the info on Super Quench: And BTW everyone was told that they were made of mild steel. I am not advocating using mild steel for a good knife steel, it is something to think about. there was nothing else at the show anything like them. there are horse people at the Blade Show, 2. I believe that the reason my knives sold well is that 1. My wife carries a Case Equine knife and I sharpen it more often than I do my Super Quenched mild steel knives. What if I quenched them in Super Quench? I started doing that and making a leather sheath and selling them for $125.00 and selling more of them. One day I thought about how much work I put into them for a $25.00 return. After all horse shoes are made of mild steel.
I was quenching them in water and not drawing a temper. I started carving horse heads on the heel of half of a horse shoe and forging a letter opener blade on the other. My wife has horses so we have plenty of horse shoes around. When I first started blacksmithing I got into carving heads, dragons, wizards, horse heads, etc. I have been using Super Quench for several years.
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