How do you harden steel with motor oil?
One way to do this is to make the steel red-hot, then plunge it into motor oil.
The carbon in the motor oil bonds with the top layer of red-hot steel molecules and forms a tough outer covering on the steel.
One last step is necessary, however, before your hardened steel is ready to work with..
What oil is used for hardening steel?
The two most common food grade oils used in this process are peanut and canola oil. Both of these oils have high flash points which is good for the quenching process. You will need to preheat these oils to slightly higher temperatures when compared to commercial quenching oils (120 – 130 degrees Fahrenheit).
How do you harden steel?
The term hardened steel is often used for a medium or high carbon steel that has been given heat treatment and then quenching followed by tempering. The quenching results in the formation of metastable martensite, the fraction of which is reduced to the desired amount during tempering.
Can you use vegetable oil to quench steel?
Quenching Oil. Realistically, just about any kind of oil would work for this. Vegetable oil, olive oil, peanut oil, motor oil, used motor oil, etc. It will all work. You do not want to use water, however.
Should I quench in water or oil?
Water quenching is a rapid cooling, where water as a qenching medium extracts heat much faster. While oil as a medium will extract heat much slower, hence rate of cooling will be slower than water.
What oil do you use to quench?
Mineral Oil Oil is a third traditional quenching agent, suitable for high-speed steels and oil-hardened steels, and in fact for any steel for which the required degree of hardness is achievable. Oil has a slower rate of cooling compared to either water or brine, but faster than air, making it an intermediate quench.