ずぶ焼やき入いれMeanings1nounimmersion quenchingTechnical term in metallurgy: hardening by plunging heated metal into a liquid bath (water or oil).ずぶ焼やき入いれは、鋼はがねの硬こう度どを高たかめるために行おこなわれる。Immersion quenching is performed to increase the hardness of steel.