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首页> 外文期刊>Journal of Materials Engineering and Performance >The Influence of Nickel and Copper on the Austempering of Ductile Iron
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The Influence of Nickel and Copper on the Austempering of Ductile Iron

机译：镍和铜对球墨铸铁奥氏体化的影响

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摘要

In the present investigation, the effect of alloying elements on the austempering process, austempered microstructure, and structural parameters of two austempered ductile irons (ADI) containing 0.6 percent Cu and 0.6 percent Cu 11.0 percent Ni as the main alloying elements was investigated. The optical metallography and x-ray diffraction were used to study the changes in the austempered structure. The effect of alloying additions on the austempering kinetics was studied using the Avrami equation. Significantly more upper bainite was observed in the austempered Cu-Ni alloyed ADI than in Cu alloyed ADI. The volume fraction of retained austenite (X_(gamma)), the carbon level in the retained austenite (C_(gamma)), and the product X_(gamma)C_(gamma) in an austempered structure of Cu-alloyed ADI are higher than in Cu-Ni-alloyed ADI. The austempering Kinetics is slowed down by the addition of Ni.
机译：在本研究中，研究了合金元素对两种以0.6％Cu和0.6％Cu 11.0％Ni为主要合金元素的奥氏体球墨铸铁（ADI）的奥氏体回火过程，奥氏体显微组织和结构参数的影响。用光学金相和x射线衍射研究了奥氏体组织的变化。使用Avrami方程研究了合金添加对奥氏体回火动力学的影响。在奥氏体化Cu-Ni合金ADI中观察到比在Cu合金ADI中更多的上贝氏体。铜合金ADI的奥氏体结构中的残余奥氏体（X_γ）的体积分数，残余奥氏体（C_γ）的碳含量和乘积X_γC_γ均高于在铜镍合金ADI中。添加镍会降低奥氏体动力学。

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