“硬化炉”常见的英文表达是 “hardening furnace” 。
“hardening”有“硬化;淬火”等含义,“furnace”意为“炉子;熔炉” ,二者组合准确表达了使材料硬化的炉子这一概念。例如:The hardening furnace is used to treat the metal components to increase their hardness.(这个硬化炉用于处理金属部件,以提高它们的硬度。 )