Nanocrystallization of Drill Hole Surface by High Speed Drilling

机译：高速钻孔钻孔表面的纳米晶体化

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Microstructure produced by drilling in as-quenched Fe-0.56%C steel was investigated. The produced microstructure consists of 4 layers in the depth; those are (from top surface) nanocrystalline (NC) layer, equiaxed submicron-crystalline (SMC) layer consisting of ferrite (α) and martensite (α') phases, recrystallized SMC α layer with a large number of cementite particles and over-tempered martensite structure layer. The NC layer has extremely high hardness and high thermal stability.

机译：研究了通过淬火Fe-0.56％C钢钻孔产生的微观结构。产生的微观结构由深度的4层组成;那些是（来自顶表面）纳米晶（NC）层，等轴亚微晶（SMC）层，由铁氧体（α）和马氏体（α'）相组成，重结晶的SMCα层，具有大量渗碳石颗粒和过度回火马氏体结构层。 NC层具有极高的硬度和高热稳定性。

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《International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials》|2005年||共4页
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Yoshikazu Todaka; Minoru Umemoto; Jinguo Li; Koichi Tsuchiya;
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中图分类工程材料一般性问题;
关键词
severe plastic deformation (SPD); nanostructure; drilling; martensite steel; white-etching layer (WEL);

机译：严重的塑性变形（SPD）;纳米结构;钻孔;马氏体钢;白色蚀刻层（WEL）;

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Nanocrystallization of Drill Hole Surface by High Speed Drilling

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