1Cr18Ni9Ti不锈钢表面复合改性处理的研究

１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢的Ｎ￣＋注入态，Ｎ－Ｃ－Ｏ共渗及Ｎ－Ｃ－Ｏ共渗＋注入复合态的表面改性进行了研究。结果表明：复合态由于同时具有一定厚度的改性层与非晶态表面，而达到了耐磨性及抗蚀性的最佳统一。Ｘ射线低角度掠射技术（ＧＩＸＲＤ）及超显微硬度计ＵＭＨＴ－３被用于Ｎ~＋注入层的组织结构分析与硬度表征，并采用俄歇能谱仪（ＡＥＳ）测量离子注入层的氮浓度分布，同时还讨论Ｎ￣＋注入对提高Ｎ－Ｃ－Ｏ共渗态抗蚀性能的贡献及其机理。     

W18Cr4V钢的离子氮碳共渗┐离子渗硫复合处理

本文研究了Ｗ１８Ｃｒ４Ｖ钢的离子氮碳共渗－离子渗硫复合处理工艺。试验表明，Ｗ１８Ｃｒ４Ｖ钢经离子氮碳共渗－离子渗硫复合处理后，表层可获得氮碳化合物和硫化物的复合渗层。该复合渗层可以明显提高Ｗ１８Ｃｒ４Ｖ钢的耐磨性。     

W18Cr4V钢的离子氮碳共渗—离子渗硫复合处理

本文研究了Ｗ１８Ｃｒ４Ｖ钢的离子氮碳共渗－离子渗硫复合处理工艺，试验表明，Ｗ１８Ｃｒ４Ｖ钢经离子氮碳共渗－离子渗硫复合处理后，表层可获得氮碳化合物和硫化物的复合渗层。该复合渗层可以明显提高Ｗ１８Ｃｒ４Ｖ钢的耐磨性。     

00Cr17Ni14Mo2不锈钢高温氮离子注入层的氮分布和组织

研究了在１５０℃～４６０℃范围内氮离子注入００Ｃｒ１７Ｎｉ１４Ｍｏ２奥氏体不锈钢后,注入层的氮分布和组织结构。结果表明,注入层的氮分布和表面组织结构依赖于注入温度。注入温度高于２５０℃,氮发生了明显的扩散,氮离子的表观扩散系数与温度的关系较好地满足Ａｒｒｈｅｎｉｕｓ方程;与低温离子注入相比,表面含氮层深度呈数量级的增加,且氮离子的保持剂量率随注入温度升高而增加。注入温度高于３５０℃时,含氮层的含氮     

1Cr18Ni9Ti不锈钢表面复合改性处理的研究

对１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢的Ｎ＾＋注入态，Ｎ－Ｃ－Ｏ共渗入Ｎ－Ｃ－Ｏ共渗＋注入复合态的表面改性进行了研究。结果表明：复合态由于同时具有一定厚度的改性层与非晶态表面，而达到了耐磨性及抗蚀性的最佳统一。Ｘ射线低角度掠射技术及超显微硬度计ＵＭＨＴ－３被用于Ｎ＾＋注入层的组织结构分析与硬度表征，并采用俄歇能谱仪测量离子注入层的氮浓度分布，同时还讨论Ｎ＾＋注入对提高Ｎ－Ｃ－Ｏ共渗态抗蚀性能的贡献及其机理。     

稀土铒和铬离子注入对电机护环钢SCC性能的影响

研究了解和铬离子高、中能量重迭注入对５０Ｍｎ１８Ｃｒ４电机护环钢ＳＣＣ性能的影响．ＳＣＣ对比试验结果表明：（１）在ＱＨＪ－７９标准硝酸盐介质中，离子注入试样的ＳＣＣ出现时间（ｔｆ）比不经注入试样的延长了６倍以上，致钝和维钝电流密度下降了一个数量级；（２）在阴极充氢条件下，两种试样均对氢致开裂（ＨＩＣ）不敏感，但离子注入可抑制氢诱发腐蚀．用ＡＥＳ－ＰＲＯ、ＲＢＳ、ＸＰＳ－ＰＲＯ、ＥＤＡＸ、金相及电化学方法分析讨论了护环钢在ＱＨＪ－７９标准介质中的ＳＣＣ机理和离子注入改善ＳＣＣ抗力及抗氢锈发腐蚀性能的机制．     

等离子体源氮离子注入层的组织与性能

采用等离子体源离子注入技术，对Ｃｒ１２Ｍｏｖ钢进行了氮离子注入。用俄歇谱仪和透射电镜对注入层的成分和组织进行了分析，分析结果表明：注入层的氮浓度分布具有类高斯分布特征；注入层中的马氏体组织被细化并有非晶态组织形成。显微硬度和摩擦性能测试结果表明，注入层的显微硬度和摩擦性能得到了明显的提高和改善。     

等离子体源氮离子注入层的组织与性能

采用等离子体源离子注入技术，对Ｃｒ１２ＭｏＶ钢进行了氮离子注入，用俄歇谱仪和透射电镜对注入层的成分和组织进行了分析了，分析结果表明，注入层的氮浓度分布具有类高斯分布特征；注放入层中的马氏体组织被细化并有非晶态组织形成。显微硬度和摩擦性能测试结果表明，注入层的显微硬度和摩擦性能得到了明显的提高和改善。     

1Cr18Ni9Ti不锈钢氮离子注入层超显微硬度的研究SCIEI

应用超显微硬度计测定１Ｃｒ１８Ｎｉ９Ｔｉ奥氏体不锈钢氮离子注入层的硬度，并用Ａｕｇｅｒ电子能谱仪及高精度轮廊仪测定氮离子注入层氮浓度分布及深度。结果表明，在９０ｋｅＶ，３×１０＾１７Ｎ＾＋／ｃｍ＾２注入时，其注入层深度为０．１８μｍ，用１ｍＮ载荷测得本征硬度ＨＶ为３．４７ＧＰａ，比非注入态表面硬度提高三倍之多，合理的试验载荷应≤１ｍ（０．１ｇ）。     

1Cr18Ni9Ti不锈钢氮离子注入层超显微硬度的研究

应用超显微硬度计测定１Ｃｒ１８Ｎｉ９Ｔｉ奥氏体不锈钢氮离子注入层的硬度，并用Ａｕｇｅｒ电子能谱仪（ＡＥＳ）及高精度轮廓仪测定氮离子注入层氮浓度分布及深度．结果表明：在９０ｋｅＶ，３ｘ１０~１７Ｎ＋／ｃｍ~２注入时．共注入层深度为０．１８μｍ、用１ｍＮ载荷侧得本征硬度ＨＶ为３．４７ＧＰａ，比非注入态表面硬度提高三倍之多，合理的试验载荷应≤ｌｍＮ（０．１ｇ）．     

MEVVA源金属离子注入和金属等离子体浸没注入

ＭＥＶＶＡ源金属离子注入技术和金属等离子体浸没注入技术ＭｅＰＩＩＩ的共同特性是强流金属离子注入。它们各具长处,相互补充,共同发展。前者因无鞘层重叠问题和其方向强的特点,特别适用于小件、简单件的大批量金属离子注入处理,能保证处理的均匀性和高效率。后者因无视线加工限制并克服了保持剂量问题,特别适用于处理体积较大、形状复杂的工件,能保证工件所有暴露表面的加工均匀性,调整工作参数,还能进行金属膜沉积和各种     

氮离子注入9Cr18Mo不锈钢的表面结构与力学性能

针对9Cr18Mo马氏体不锈钢,检测了氮离子注入前后表面纳米硬度和摩擦磨损性能,分析了注入后9Cr18Mo钢的表面组织结构和化学组成.结果显示,氮离子注入有效提高了材料的表面硬度,降低了摩擦系数和磨损的同时,没有改变材料表面形貌和粗糙度.表面氮注入层分为两层:表面20 nm深度内除金属氮化物及氮过饱和固溶体强化相外,还富集大量碳原子,其主要存在方式为CrxCy相;次表面层主要为金属氮化物.氮离子注入后9Cr18Mo不锈钢表面形成的新的组织结构是其具有良好力学性能的根本原因.     

等离子浸没式注入表面改性

采用新型的离子注入技术－离等子体浸没式离子注入对４５钢进行了氮离子注入,测定了注入层的氮浓度俄歇剖面会布,显微硬度和摩擦性能,对磨损表面进行了扫描电镜分析。结果表明,采用等离子浸没式离子注入技术能够获得钢表改性效果。     

等离子体源离子注入表面改性研究及应用

采用等离子体源离子注入技术 (PSII)对W18Cr4V高速钢进行了氮离子注入。用俄歇能谱仪对注入层的成分进行了分析。对注入层的显微硬度和耐磨性进行了测试。用扫描电镜对摩擦磨损表面进行了分析。研究结果表明 :氮在注入层呈高斯分布 ,注入层的硬度和耐磨性均明显提高。对等离子体源离子注入技术在航空液压泵配油盘上的应用进行了研究。应用研究结果表明 :经等离子体源离子注入后的配油盘单位行程内回油量的增加量比未注入前下降约 90 % ,从而明显地增加了配油盘的使用寿命     

Diamond-like carbon films synthesized on bearing steel surface by plasma immersion ion implantation and deposition

Diamond-like carbon (DLC) films were synthesized by plasma immersion ion implantation and deposition (PIIID) on 9Cr18 bearing steel surface. Influences of working gas pressure and pulse width of the bias voltage on properties of the thin film were investigated. The chemical compositions of the as-deposited films were characterized by Raman spectroscopy. The micro-hardness, friction and wear behavior, corrosion resistance of the samples were evaluated, respectively. Compared with uncoated substrates, micro-hardness results reveal that the maximum is increased by 88.7%. In addition, the friction coefficient decreases to about 0.1, and the corrosion resistance of treated coupons surface are improved significantly.     

Tribological behavior of AISI302 austenitic stainless steel modified by elevated temperature nitrogen plasma immersion ion implantation

AISI302 stainless steel samples were modified by elevated temperature nitrogen plasma immersion ion implantation at temperature ranging from 330 ℃ to 450 ℃. The tribological behaviors of the implanted layers of the samples were investigated. The samples were characterized by Auger electron spectroscopy (AES), glancing angle X-ray diffraction (GXRD), and nanoindentation. The results show that the implantation temperature plays an important rule on the microstructure and surface properties of the implanted layers. The thickness of the modified layer implanted at 390 ℃ is about 9 μm. It is improved about two orders compared with that of the implanted at room temperature. The surface nanohardness and the wear resistance of elevated temperature implanted layers increase significantly, and the friction coefficient decreases obviously in comparison with the unimplanted one. These data suggests that the improvement results from the formation of new phases such as ε-(Fe, Cr, Ni)2 xN, or noncrystal phase.     

Structure and properties of silver-containing a-C(H) films deposited by plasma immersion ion implantation

In this study, we have grown silver-containing hydrogenated (a-C:H) and non-hydrogenated (a-C) amorphous carbon coatings by two plasma immersion ion implantation methods: I) chemical vapor deposition of methane combined with pulsed filtered cathodic arc deposition of silver, and II) by alternating arc pulses from graphite and silver in a dual cathodic arc plasma source. This unique “bias selective” feature of the deposition system allowed the deposition of silver with the substrates at ground and avoided the sputtering of the grown a-C film. Chemical composition of the samples was analyzed by acquiring their compositional depth-profiles using radio-frequency Glow Discharge Optical Emission Spectroscopy (rf-GDOES), while the microstructural properties were analyzed by X-ray absorption near edge spectroscopy (XANES) and Raman spectroscopy. In this contribution, we compare mechanical and biomedical properties by means of nanoindentation and cell viability tests, respectively, of a-C(H) films obtained by two different plasma immersion ion implantation techniques.     

强束流钽、碳离子双注入H13钢的研究

选用强碳化物形成元素钽作为金属蒸汽真空弧离子源(metal vapor vacuum arc，简称MEWA)的阴极，对H13钢进行了钽离子注入表面改性研究。对比了Ta、C离子单注入和Ta、C离子双注入的效果，测量了离子注入表面的成分，考察了注入表面的相结构。在相同的摩擦磨损试验条件下，测量了摩擦因数和磨损量，研究表明，和未注入Ta、C单离子注入相比，Ta、C离子双注入提高了H13钢的耐磨性并大幅度降低了其表面的摩擦因数。双注入区出现的弥散TaC相是耐磨性提高、摩擦因数降低的主要原因。在试验条件下，对H13钢单注入Ta时未发现TaC的形成。     

High-current metal ion implantation for industrial applications

Ion implantation, as an efficient surface processing technique, has developed to include the implantation of various metallic ions for improving not only wear properties, but also such other surface properties as solid lubrication, fatigue, chemical stability, and engineering reliability. The high-dose metal ion implantation that can be accumulated in a short time over a relatively large implanting area makes metal vapor vacuum arc (MEVVA) source ion implantation well suited to practical surface engineering modification applications.     

Elevated temperature nitrogen plasma immersion ion implantation of AISI 302 austenitic stainless steel

AISI 302 steel was modified using elevated temperature nitrogen plasma immersion ion implantation. The thickness of the modified layers is improved significantly compared with that of the layer implanted at room temperature. The surface nanohardness of the treated sample is much higher. Both the friction coefficient and wear rate are dramatically reduced due to the formation of new phases such as (Cr, Fe)₂N_1−x, ε-(Fe, Cr, Ni)_2+xN, nitrogen expanded austenite (γ_N) or noncrystalline phase in the near surface.