摘要
利用６０ｋｅｖ的Ａｌ＋以４×１０￣（１７）ｉｏｎｓ／ｃｍ￣２的剂量对３１６奥氏体不锈钢进行了离子注入，并对注入前后之试样的显微硬度、摩擦磨损性能和电化学腐蚀性能进行了试验研究，还对Ａｌ”注入表面改性的机理作了探讨。结果发现，Ａｌ￣＋注入对３１６奥氏体不锈钢表面改性的效果很好，可以使其显微硬度提高４３．７％，摩擦系数降低约５０％，耐磨性能也有明显提高，同时还能使这种材料的腐蚀电流密度和腐蚀速率分别降低３个数量级和９个数量级。微观分析表明，注入的Ａｌ￣＋主要以替代方式存在于奥氏体结构中，改性层内大量替代式缺陷和空位型缺陷的存在造成了较大的晶格畸变，从而增强了固溶强化的效果。另外，由于铝和氧的亲和力很强，不仅容易在不锈钢表面形成氧化膜，而且还有助于磨损过程中氧化膜的形成与修复，因此，Ａｌ￣＋的注入能使３１６奥氏体不锈钢由粘着磨损转变为以氧化磨损为主的磨损机制。
The ions of Al+ with 60keV were implanted into 31 6 stainless steel (31 16SS) by thedose of 4 × 1017 ions/cm2. Microhardness , friction , wcar and electrochemical properties have beenstudied before and after Al+ implantation. The mechanism of surface medification was discussed. Itwas found that , after Al+ implantation , the rnicrohardness of 3 1 6SS was imcreased by 43. 7 % ; thefriction coefficient was decrcased by 50%; the wear resistance was increased apparently; thecorrosion density and the corrosion rate of 31 6SS were decreased by three orders of magnitude andnine orders of magnitude, respectively. The result of microanalysis showed that Al existed mainlyin austenitic structure as sutbstitutions. Many substitutional defects and vacancies existing inmodified layer made grcat lattice deformation, and this improved the solid solution hardening.Forthermore, the affinity of aluminium for oxygen is strong, the oxide film was easily formed onthe surface of 31 6SS. In addition, Al+ implantation had the advantages of forming and recoveringthe oxide films during the wear processes. The wear mechanism of 316SS was changed fromadhesive wear to oxidative wcar after Al+ implantation.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1994年第4期306-313,共8页
Tribology
基金
国家青年自然科学基金
关键词
离子注入
奥氏体不锈钢
表面改性
电化学腐蚀
ion implantation, 316 stainless steel, surface modification, electrochemicalcorrosion , adhesive wear, oxidative wear
