Heat Treating A Lawn Mower Blade Knife
Normalizing the metal this relieves stress and prevents warping.
Heat treating a lawn mower blade knife. The ultimate knife made from a lawn mower blade using basic tools duration. I was using it to heat them up and quench to make it easier to snap off the parts i didn t want rather than cut. A gallon of it is pretty cheap at the big box stores.
However overheating blades of lawnmowers beyond a certain degree of temperature comes with an equal share of disadvantages. Any home shop i m aware of anyway. Heat treating knives blades etc.
So at best you re guessing as to how to heat treat. It s up to you of course but my non flame recommendation is spend the 75 and sleep worry free. Basically you pack clay around the knife to control how fast it cools when you quench it this allows you to have a hard edge which will stay sharp and a soft spine which increases durability.
Mower blades are not simple steel anymore and the heat treatment is an exotic process not doable in the home shop. It is the only way of ensuring that they last long and withstand tough working conditions. How to heat treat rebar knives for edge retention it works.
Then i had found another at the scrap yard and made it into 4 more smaller blades. I ve done heavy mower blades in canola oil before and they turned out ok. The steps for heat treatment are.
I do a differential heat treatment on my blades. It s cleaner and smells a lot better than motor oil. Or let the grass grow.
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