oil hardening

oil-harden

[oil-hahr-dn]
verb (used with object) Metallurgy.
to quench (steel) in a bath of oil.
Compare water-harden.


Origin:
1900–05

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
oil hardening
 
n
Compare air hardening a process of hardening high-carbon or alloy steels by heating and cooling in oil

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