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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Austenitization on Austempering of Copper Alloyed Ductile Iron
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Effect of Austenitization on Austempering of Copper Alloyed Ductile Iron

机译：奥氏体化对铜合金球墨铸铁奥氏体化的影响

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摘要

A ductile iron containing 0.6% copper as the main alloying element was austempered at a fixed austempering temperature of 330 deg C for a fixed austempering time of 60 min after austenitization at 850 deg C for different austenitization periods of 60, 90, and 120 min. The austempering process was repeated after changing austenitization temperature to 900 deg C. The effect of austenitization temperature and time was studied on the carbon content and its distribution in the austenite after austenitization. The effect of austenitization parameters was also studied on austempered microstructure, structural parameters like volume fraction of austenite, X_gamma, carbon content C_gamma, and X_gamma C_gamma, and bainitic ferrite needle size, d_alpha after austempering The average carbon content of austenite increases linearly with austenitization time and reaches a saturation level. Higher austenitization temperature results in higher carbon content of austenite. As regards the austempered structure, the lowering austenitization temperature causes significant refinement and more uniform distribution of austempered structure, and a decrease in the volume fraction of retained austenite.
机译：在850℃奥氏体化后的60到90分钟和120分钟的不同奥氏体化时间之后，将含有0.6％铜作为主要合金元素的球墨铸铁在330摄氏度的固定奥氏体温度下进行60分钟的固定奥氏体化时间。将奥氏体化温度更改为900摄氏度后，重复进行奥氏体回火过程。研究了奥氏体化温度和时间对奥氏体化后奥氏体中碳含量及其分布的影响。还研究了奥氏体化参数对奥氏体组织，奥氏体体积分数，X_gamma，碳含量C_gamma和X_gamma C_gamma等结构参数的影响，以及奥氏体回火后贝氏体铁素体针尺寸，d_alpha的影响。奥氏体平均碳含量随奥氏体化时间线性增加并达到饱和水平。较高的奥氏体化温度导致较高的奥氏体碳含量。关于奥氏体组织，降低的奥氏体化温度引起奥氏体组织的显着细化和更均匀的分布，并且降低了残余奥氏体的体积分数。

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