表面硬化处理 meaning in English

carburation
surface hardening
temper brittleness

Heat treatment of ferrous materials ; heat treatment methods ; case hardening
钢铁材料热处理.热处理方法.第3部分:表面硬化处理
Powder metallurgy . sintered metal materials , excluding hardmetals . determination of hardness . part 3 : sintered products hardened on a surface by other treatments than in nf a 95 - 321 - 2
粉末冶金.硬质合金除外的烧结金属材料.硬度的测定.第3部分:除在nfa 95 321 - 2中表面硬化处理以外的烧结产品