Most often used phrases:
work hardeningcase hardening
precipitation hardening
strain hardening
hardening process
radiation hardening
induction hardening
surface hardening
differential hardening
age hardening
target hardening
diffusion hardening
hardening pharaoh s
hardening alloys
quench hardening
'hardening' used in domains:
hardeningsteel.comrapidhardening.com
metalhardening.com
hardeningstainless.com
hardeningthepowers.com
cryogenichardening.com
Statistical data
"hardening" has the frequency of use of 0.0001% on city-data.com forum
"hardening" has the frequency of use of 0.0001% on en.wikipedia.org.
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