AMS 6308钢中Cu的析出强化

发布时间：2018-12-16 05:16

【摘要】：研究了AMS 6308钢在不同温度回火过程中Cu的强化机制及其对力学性能的影响。结果表明,150~350℃回火,AMS6308钢的组织为回火马氏体,强度和硬度略有增加,韧性下降。400~450℃回火,强度和硬度逐渐增加,这是由大量细小(10 nm)的ε-Cu相在基体内和位错线上析出造成。450℃回火,ε-Cu相析出数量显著增加,导致强度和硬度达到峰值,韧性最差。450℃以上回火,随温度提高,ε-Cu相长大粗化,析出数量减少,其形态由球状转变为棒状或短杆状,沉淀强化作用减弱,M6C碳化物长大,基体发生回复再结晶,强度和硬度显著下降,韧性逐渐提高。
[Abstract]:The strengthening mechanism of Cu and its effect on mechanical properties of AMS 6308 steel during tempering at different temperatures were studied. The results showed that the microstructure of AMS6308 steel was tempered martensite, strength and hardness increased slightly, toughness decreased, tempering at 400 ~ 450 鈩，

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