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工件的氧氮化处理是在530～560℃NH_3—H_2O混合气氛中进行的热化学处理,使工件表面形成一层氧氮化层,氧氮化层的表面层是磁性氧化铁膜,内层是氧氮扩散层。表面氧化能保存润滑油和减少摩擦力,氧氮化膜内的氧氮化扩散层具有高的硬度和抗磨性,而无脆性。经氧氮化处理后的工件油浸后呈现兰灰黑色,由于表层氧化膜的阳极保护作用,提高了工件的防锈能力。如果这种方法用在切削工具,如:钻头、铣刀等高速钢制品的处理上,还可以明显地提高使用寿命。
Oxidation of the workpiece is carried out in the 530 ~ 560 ℃ NH_3-H_2O mixed atmosphere thermochemical treatment, the workpiece surface to form a layer of oxynitride layer, the surface of the oxynitride layer is a magnetic iron oxide film, the inner layer Is oxygen and nitrogen diffusion layer. Surface oxidation can save lubricating oil and reduce friction. The oxynitride diffusion layer in the oxynitride film has high hardness and abrasion resistance without brittleness. Oxygen nitriding after the workpiece oil blue gray gray, due to the surface oxide film anode protection, improve the anti-rust ability of the workpiece. If this method is used in cutting tools, such as: drill, cutter and other high-speed steel products processing, but also can significantly improve the service life.