【摘要】 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。更多还原

【Abstract】 The microstructure,phase constituents and hardness of Cr-Mo-Cu alloy cast iron modified with and without nano-additives were characterized with XRD,SEM and micro-hardness tester.The grinding efficiency and service life of grinding boards made of Cr-Mo-Cu alloy cast iron were examined in production.The results show that the morphology of graphite transforms from small amount of thick-long flake to big amount of thin-short vermicular after nano modification.Furthermore,the grain size is refined.The XRD peaks become broader and shift.The hardness is significantly increased.The grinding efficiency and service life of the Cr-Mo-Cu alloy cast iron grinding boards are obviously improved.更多还原