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采用X射线衍射仪、扫描电子显微镜及硬度计对纳米改性前后的Cr-Mo-Cu合金铸铁进行了显微组织观察、XRD物相分析和硬度测定,并在生产中考查了由Cr-Mo-Cu合金铸铁制成的光球磨板的磨削加工效率及使用寿命。结果表明,纳米改性后Cr-Mo-Cu合金铸铁中的石墨由形态粗长、数量较少的片状变成了形态细短、数量较多且分散的蠕虫状,晶粒明显细化;XRD衍射峰发生宽化和偏移;洛氏硬度显著提高;制成的Cr-Mo-Cu合金铸铁光球磨板磨削效率和使用寿命均有十分显著的增加。
The microstructure, hardness, and XRD of Cr-Mo-Cu alloy cast iron before and after nano-modification were investigated by X-ray diffraction, scanning electron microscopy and hardness tester. -Cu alloy ball mill made of light ball grinding plate grinding efficiency and service life. The results show that the graphite in the Cr-Mo-Cu alloy cast iron by nano-modification is coarse and long, the number of small pieces into a thin, large number and dispersed worm-like shape, the grain refinement significantly; XRD diffraction peak widening and offset; Rockwell hardness increased significantly; Cr-Mo-Cu alloy cast iron ball mill grinding efficiency and service life have a very significant increase.