精密硬态切削表面白层的形成是剧烈塑性变形导致的。
The severe plastic deformation is the main mechanism of white layer formation during precision hard part machining process.
膜层质量好，外观呈灰色，磷化膜表面无挂灰、返白现象。
The film quality is good, the appearance is gray, the phosphating film surface does not have the ash and the white phenomenon.
结果表明：（1）机械加工表面微观形貌主要包括：变形层、应变线、皱折、拉扯和白层等特征；
The results show that: (1) the mechanic surface micro morphlogy mainly includes deformation layer, strain line, fold, tear and white layer.
结果表明：（1）机械加工表面微观形貌主要包括：变形层、应变线、皱折、拉扯和白层等特征；
The results show that: (1) the mechanic surface micro morphlogy mainly includes deformation layer, strain line, fold, tear and white layer.
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