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Case hardening
A generic term covering several processes applicable to steel that change the chemical composition of the surface layer by absorption of carbon, nitrogen, or a mixture of the two and, by diffusion, create a concentration gradient. The outer portion, or case, is made substantially harder than the inner portion, or core. The processes commonly used are carburizing and quench hardening; cyaniding: nitrifying; and carbonitriding. The use of the applicable specific process name is preferred.
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- Part of Speech: noun
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- Industry/Domain: Materials science
- Category: Corrosion engineering
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