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分级淬火 fēnjìcuìhuǒ
archit.	hot quenching
auto.	step hardening; step quenching
el.mach.	grade hardening
met.	broken hardening; graded hardening (【技】先将工件淬人温度略高于钢 Ms 点的冷却介质(如融盐)中，待工件各部分与冷却介质温度一致，并在奥氏体开始发生分解之前，迅速把工件转人另一种冷却介质中冷却至室温，使奥氏体转变为马氏体的热处理工艺。其优点是工件淬火内应力比油淬小且变形小，降低了淬裂危险性。分级淬火回火后的冲击韧性有显著提高。); interrupted quenching; marquenching; martemper; time quenching; broken quenching
oil	marquench; martempering
tech.	graduated hardening; interrupted hardening; progressive quenching
分级断续，多次淬火
auto.	graded hardening
分级顺序淬火
construct.	progressive quenching

分级淬火 : 15 phrases in 4 subjects

Aviation	1
General	1
Metallurgy	7
Technology	6