用空气和汽油进行离子氮碳氧多元共渗

Plasma N-C-O Multi-elements Penetrating With Air and Gasoline

研究了40Cr钢空气/汽油离子氮碳氧多元共渗工艺,利用光学显微镜、显微硬度计、X射线衍射仪和扫描电镜分析了渗层组织、表面硬度、相组成和截面形貌,讨论了空气和汽油的比率对渗层组织、相组成及显微硬度分布的影响。试验结果表明,40Cr钢空气/汽油离子氮碳氧多元共渗是可行的;离子氮碳氧多元共渗的渗层硬度和厚度随着汽油/空气比例的增加而增加,试样表面的相组成随着气氛的变化而变化,并且氧能促进共渗。

The plasma N-C-O multi-element penetrating process with air and gasoline was studied. The microstructure, surface hardness, phase composition and-cross section morphology of the layer were analyzed by optical microscope, microhardness tester, X-ray diffractometer （XRD） and scanning electron microscope （SEM）. The influences of the atmosphere with different ratios of air and gasoline on the microstructure, phase composition and microhardness distribution of the penetrated layer were investigated. The experimental results show that the plasma N-C-O multi-element penetrating with air and gasoline of 40Cr steel is feasible. The hardness and thickness of the plasma N-C-O multi-element penetrated layer increase with the increment of ratio of gasoline to air, the phase composition of the specimen surface differs according to the atmosphere and oxygen can accelerate the N-C-O multi-element penetrating process.