采用着色腐蚀技术，金相显示了球墨铸铁缩松区中奥氏体枝晶组织形貌，分析了球铁缩松的形成机制。
The morphology of austenite dendrites in shrinkage porosity in nodular iron is displayed by the color etching technique and the formation mechanism of shrinkage porosity has been analyzed.
刚玉晶体结构型氧化铬有高的着色力、高热稳定性及耐化学腐蚀等特点。
Chromium oxide green with corundum crystal structure has such characteristics as high thermal stability, high painted capacity, chemical corrosion-resisting capacity, etc.
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