不同离子注入工艺对45CrMoVE结构钢性能影响研究  

Effects of Different Implantation Processes on Properties of 45CrMoVE Structural Steel

作　　者：李奎 彭文雅 李钢 赵宇 王影 LI Kui;PENG Wenya;LI Gang;ZHAO Yu;WANG Ying(AECC Hunan Aviation Powerplant Research Institute,Hunan Zhuzhou 412002,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002

出　　处：《装备环境工程》2024年第2期73-80,共8页Equipment Environmental Engineering

摘　　要：目的通过分析不同元素离子注入对结构钢耐腐蚀能力及力学性能的影响,筛选出最佳注入元素,以改善45CrMoVE结构钢的表面组成,提高其耐腐蚀性能。方法基于前期研究工艺,开展Mo、Co、Ta、Ti等离子注入技术研究。将注入离子后的结构钢试样放入Na Cl溶液中,分析不同元素离子注入对结构钢腐蚀电位的影响,结合盐雾腐蚀试验,研究不同离子注入对结构钢耐腐蚀性能的影响,同时结合X射线衍射技术和力学性能测试,对结构钢试样表面层的物相进行分析,研究离子注入对结构钢力学性能的影响。结果氯化钠溶液在注入Mo离子后的自然腐蚀电位最高、最正,当基体材料中注入的Mo剂量为3×10^(17)atoms/cm^(2)时,腐蚀电位接近0.5 V,腐蚀电流最小。注入Mo离子后,试片的耐盐雾腐蚀性能最好。Mo离子与结构钢中的C原子相结合,在结构钢表面层形成较多的MoC和Mo_(2)C等碳化物,提高了结构钢的耐腐蚀性能。离子注入层厚度尺寸小,注入离子后基本不改变基体材料的表面形貌和宏观力学性能。结论离子注入能够有效改善结构钢的耐腐蚀性能,对于45CrMoVE结构钢试样,当注入3×10^(17)atoms/cm^(2)剂量的Mo离子、注入能量为130 keV时,离子注入对45CrMoVE结构钢耐腐蚀能力的改善效果最佳。The work aims to select the best injected elements by analyzing the effect of different ion implantation on the corrosion resistance and mechanical properties of the structural steel to improve the surface composition and corrosion resis-tance of 45CrMoVE structural steel.Based on the previous research process,the study of Mo,Co,Ta and Ti ion implantation technology was carried out.The structural steel samples with ion implantation were put into NaCl solution to analyze the effect of ion implantation of different elements on the corrosion potential of structural steel.Combined with the salt spray corrosion test,the effect of different ion implantation on the corrosion resistance of structural steel was studied.The phase of the surface layer of structural steel samples was analyzed by X-ray diffraction technique as well.Mechanical properties of structural steel after ion implantation were investigated by mechanical properties test.After Mo ions were injected into NaCl solution,the natu-ral corrosion potential and pitting potential were the highest and most positive.When the structural steel was injected with Mo ions for 3×10^(17)atoms/cm^(2),the corrosion potential was close to 0.5 V and the corrosion current was the minimum.After implan-tation of Mo ions,the test piece had the best salt spray corrosion resistance.Mo ion combined with C atom in structural steel to form more carbides such as MoC and Mo_(2)C on the surface layer of structural steel,which improved the corrosion resistance of structural steel.Due to the small thickness of the ion implantation layer,the surface morphology and macroscopic mechanical properties of the structural steel were basically unchanged after ion implantation.Ion implantation can effectively improve the corrosion resistance of 45CrMoVE structural steel.While Mo ions are injected with 3×10^(17) atoms/cm^(2)and the implantation en-ergy is 130 keV,the corrosion resistance of 45CrMoVE structural steel is the best.

关 键 词：45CrMoVE结构钢 离子注入 腐蚀电位 耐腐蚀性 界面组织 力学性能 

分 类 号：TG174[金属学及工艺—金属表面处理]