nodular graphite

The high temperature solidification structure in hypereutectic nodular iron has been showed clearly by the color etching technique and the formation mechanism of the austenite shell (the austenite shell is a part of the austenite dendrites) around the nodular graphite has been observed and analyzed.

采用着色腐蚀技术 ,可清晰地显示出过共晶球墨铸铁中的高温凝固组织 ,观察分析了石墨球周围奥氏体壳 (奥氏体壳是奥氏体枝晶的一部分 )的形成机制。

The influences of s.

介绍了球墨铸铁的微观和宏观凝固特征,薄壁和厚壁球铁的凝固形貌特点,以及球铁铸件壁厚与凝固时间的关系,同时分析了石墨球数和共晶晶粒数对球墨铸铁凝固品质的影响。

First some thermodynamics theories of surface science are presented and then the surface free energy－ adsorption hypothesis of graphite spheroidization is analysed.

在回顾表面科学的热力学基本理论的基础上，作者分析指出了界面能 (吸附 )学说在阐述球墨铸铁中石墨球化机理时存在的不足之处。

Thc graphitic rear ratio of single grain, mean value of graphitic area ratio and graphitic globuring ratio can be ealculated througy using of OMNICON 3600 image analyzer to determine graphitic roundness value and through using computer system to treat.

利用ＯＭＮＩＣＯＮ３６００图像分析仪测定石墨圆度值，通过计算机处理系统计算出单颗料石墨面积率、石墨面积率平均值和石墨球化率。