等离子喷涂复合陶瓷涂层及其耐磨性能

用等离子喷涂技术制取了ＭＯ＋Ａｌ２Ｏ３－ＴｉＯ２、ＭＯＳ２＋Ａｌ２Ｏ３、ＴｉＯ２＋Ｃｒ３Ｃ２ＮｉＣｒ和ＭｏＳ２＋Ｃｒ３Ｃ２－ＮｉＣｒ复合涂层．利用ＳＥＭ、ＸＲＤ、和ＸＰＳ等技术．观察和分析了涂层的显微结构和喷涂过程中的物相变化及添加成分对涂层耐磨性能的影响．在ＭＭ－２００型磨损试验机上测定了涂层的滑动摩擦系数和磨损率．结果表明；Ｍｏ、ＭｏＳ２与Ａｌ２Ｏ３－ＴｉＯ２的结合性能较好，ＴｉＯ２、ＭｏＳ２在Ｃｒ３Ｃ２－ＮｉＣｒ涂层的气孔和裂纹处偏聚；添加ＭｏＳ２对Ａｌ２Ｏ３－ＴｉＯ２涂层的物相组成有明显的影响；适量的ＭＯ、ＭＯＳ２加入Ａｌ２Ｏ３－ＴｉＯ２中，可以降低涂层的摩擦系数和磨损率；而ＴｉＯ２、ＭｏＳ２加入Ｃｒ３Ｃ２－ＮｉＣｒ中，对涂层的摩擦磨损性能影响不大     

多元合金奥氏体耐热球铁的强化

本文研究了Ｍｏ、Ｃｒ、Ｎｂ、Ｓｉ、Ａｌ等元素对奥氏体球铁（２０％Ｎｉ）高温机械性能和抗氧化性的影响，认为Ｍｏ、Ｃｒ、Ｎｂ均提高了高温机械性能和抗变形能力。Ａｌ可提高抗氧化性，但大大降低高温热强性，恶化铸造性能。     

齿科铸造Co－Cr合金组织和性能的研究

牙科铸造用Ｃｏ－Ｃｒ合金在真空感应炉中进行熔配．浇成小铸锭。用高频离心铸造机进行合金二次重熔，铸成假牙修复体。本文系统地研究了从Ａｌ、Ｓｉ、Ｃｒ、Ｃ、Ｎｉ等合金元素对Ｃｏ－Ｃｒ合金机械性能、铸造性能和化学稳定性的作用．对筛选出的综合性能优良的ＣＷ－Ｈ型Ｃｏ－Ｃｒ合金进行了动物试验，临床应用效果良好。     

各种钢铁材料的快速渗氮效果

为了探讨快速气体渗氮新工艺的适用范围，本文对３８ＣｒＭｏＡｌＡ、４２ＣｒＭｏ、３５ＣｒＭｏ、４０Ｃｒ、２０ＣｒＭｎＴｉ、３０ＣｒＭｎＴｉ、２３Ｍｎ３Ｖ２Ａｌ、美国钢种１Ｅ１１８１、１Ｅ５０９及球铁ＱＴ６０－２等进行了快速渗氮试验，在此基础上着重分析了钢铁材料的快速渗氮效果。     

激光熔覆M－Cr－Al－Y合金及其抗氧化性能研究

本文研究了Ｍ－Ｃｒ－Ａｌ－Ｙ合金（Ｍ＝Ｎｉ，Ｃｏ，Ｆｅ）激光熔覆层的显微组织，微区成分及抗氧化性。氧化增重试验结果表明，Ｍ－Ｃｒ－Ａｌ－Ｙ涂层具有比１Ｃｒ＿（１８）Ｎｉ＿９Ｔｉ不锈铜低得多的氧化增重和氧化速率，其中以Ｃｏ－Ｃｒ－Ａｌ－Ｙ涂层为最好，其次依次为Ｎｉ－Ｃｒ－Ａｌ－Ｙ，Ｎｉ－Ｃｏ－Ｃｒ－Ａｌ－Ｙ＿２Ｏ＿３，Ｆｅ－Ｃｒ－Ａｌ－Ｙ．     

Cr—Al复全钝化膜的组成及稳定性研究

本文在０．５ｍｏｌ／ＬＨ２ＳＯ４中测定了Ｆｅ－Ｃｒ，Ｆｅ－Ａｌ，Ｆｅ－Ｃｒ－Ａｌ和Ｆｅ－Ｍｎ－Ａｌ－Ｃｒ合金的极化曲线，用透射电镜和光电子能谱仪对它们的钝化膜的组成和稳定性进行了分析研究。结果表明：在上述合金的钝化膜中，均出现了Ｃｒ，Ａｌ的富集，但要Ｆｅ－Ｃｒ－Ａｌ合金的钝化膜中，Ｃｒ的富集受到抑制，而在Ｆｅ－Ｍｎ－Ａｌ－Ｃｒ合金的钝化膜中Ｃｒ富集未受到抑制。     

40Mn26Al3Cr6Re 奥氏体不锈钢复合钝化膜的TEM研究

对铁－锰－铝－铬奥氏体不锈钢４０Ｍｎ２６Ａｌ３Ｃｒ６Ｒｅ在０．５ｍｏｌ／ＬＨ２ＳＯ４溶液中钝化后形成的表面膜进行了ＴＥＭ分析研究．ＴＥＭ分析结果证明：４０Ｍｎ２６Ａｌ３Ｃｒ６Ｒｅ不锈钢表面钝化膜主要是α－Ａｌ２Ｏ３、θ－Ａｌ２Ｏ３、（Ｃｒ２Ｏ３）１０Ｂ的机械混合物；其中（Ｃｒ２Ｏ３）１０Ｂ的含量最多．钝化膜为层状结构，内层为多晶，外层是微晶和非晶；钝化膜与基体在结晶学上存在外延关系．     

Fe—Mn—Si—Cr形状记忆合金的耐腐蚀性能

通过腐蚀重量法实验及电化学测试，研究了Ｆｅ－Ｍｎ－Ｓｉ－Ｃｒ形状记忆合金的耐腐蚀性能，并与Ｆｅ－Ｍｎ－Ｓｉ状态记忆合金及１８－８铬镍不锈钢的耐腐蚀性能作了比较，结果表明，Ｆｅ－Ｍｎ－Ｓｉ－Ｃｒ合金的耐腐蚀性能明显高于Ｆｅ－Ｍｎ－Ｓｉ合金，在Ｆｅ－Ｍｎ－Ｓｉ－Ｃｒ合金中随着铬含量的增加，其耐腐蚀性能也相应提高。     

Cr-Al复合钝化膜的组成及稳定性研究

本文在０．５ｍｏｌ／ＬＨ２ＳＯ４中测定了Ｆｅ－Ｃｒ、Ｆｅ－Ａｌ、Ｆｅ－Ｃｒ－Ａｌ和Ｆｅ－Ｍｎ－Ａｌ－Ｃｒ合金的极化曲线，用透射电镜和光电子能谱仪对它们的钝化膜的组成和稳定性进行了分析研究．结果表明：在上述合金的钝化膜中，均出现Ｃｒ、Ａｌ的富集，但在Ｆｅ－Ｃｒ－Ａｌ合金的钝化膜中，Ｃｒ的富集受到抑制，而在Ｆｅ－Ｍｎ－Ａｌ－Ｃｒ合金的钝化膜中Ｃｒ富集未受到抑制．Ｆｅ－Ｍｎ－Ａｌ－Ｃｒ的Ｃｒ、Ａｌ复合钝化膜的钝性优于同等含Ｃｒ量的Ｆｅ－Ｃｒ合金，更优于同等Ｃｒ、Ａｌ含量的Ｆｅ－Ｃｒ－Ａｌ合金．本文认为，锰使得膜中的硫含量降低，致使钝化膜的稳定性提高     

SiCW在Al2O3—C复合耐火材料中原位生长的实验研究

通过引入金属Ｓｉ和活性Ｃ对ＳｉＣ晶须在Ａｌ２Ｏ３－Ｃ复合耐火材料中的原位生长进行了实验研究，利用ＳＥＭ结合电子探针（ＥＭＡ）研究了ＳｉＣｗ在Ａｌ２Ｏ３－Ｃ复合耐火材料中原位生长机理，提出ＬＳ生长机理，讨论了ＳｉＣｗ在Ａｌ２Ｏ３＿Ｃ复合耐火材料中的原位生长的热力学条件和晶须生长的动力学控制环节。     

9SiCr钢激光表面合金化后的组织与性能

在9SiCr钢表面通过涂敷Cr-WC粉末,激光合金化后,可以获得含Cr、W较基体高的合金化表层。合金化表层由激光合金化区及相变硬化区组成。通过金相显微镜、扫描电镜能谱、透射电镜、x射线衍射研究了合金化层的组织形貌、成份及相结构。该合金化层比基体具有良好的红硬性及较高的耐磨性、耐腐蚀性。     

Improving corrosion resistance of Q235 steel by Ni-Cr alloyed layer

Ni-Cr alloyed layer was formed on surface of Q235 steel by double glow plasma surface metallurgy to improve the corrosion resistance of substrate. The composition and microstructure of alloyed layer was analyzed by SEM and XRD. Potentiodynamic polarization and electrochemical impedance spectroscopy was applied to evaluate the corrosion resistance of the alloyed layer. The results showed working pressure had a great effect on structure of Ni-Cr alloyed layer, and the dense and smooth alloyed layer was prepared at 50 Pa working pressure. Compared with substrate, Ni-Cr alloyed layer exhibited higher corrosion potential, lower corrosion current density and larger charge transfer resistance, which indicated that Ni-Cr alloyed layer significantly modified the corrosion resistance of Q235 steel.     

球墨铸铁轧辊的光纤激光合金化性能

为了提高球墨铸铁轧辊的使用性能,采用光纤激光合金化系统对轧辊表面的预置合金层进行激光扫描,在球墨铸铁轧辊表面形成了冶金结合的合金化层.在最佳工艺参数条件下,分析了合金化层的耐磨性能、维氏硬度、冷热疲劳性能和显微组织.结果表明,合金化后的球墨铸铁轧辊的耐磨性能约为基体的3倍,维氏硬度也得到了明显提高,冷热疲劳性能基本相同.合金化层由亚共晶组织构成,亚共晶组织初晶相由马氏体(M)、未分解WC硬质相及共晶组织构成,共晶组织由马氏体(M)与复杂碳化物(WC、Co6W6C和Fe3C)构成.合金化层深度约为0.4 mm且组织细小.     

基体组织对合金结构钢耐海水腐蚀性能的影响

在实验室加速腐蚀试验和力学试验基础上，研究了合金结构钢基体组织中铁素体－珠光体比例与其在海水中的腐蚀速率和常规力学性能之间的关系。试验结果及分析表明：调整珠光体－贝氏体组织比例能够提高合金结构钢耐海水腐蚀性能和力学性能。     

四种典型合金白口铸铁磨损特性的研究

在模拟实际件冷度速度的基础上，着重研究了四种典型合金白口铸铁的强度、组织、耐磨性及磨损形貌。试验结果表明：以Ｍ７Ｃ３型加ＶＣ型碳化物的Ｍ２合金，其硬度高，碳化物分析均匀，耐磨性好。     

Oxidation behavior of niobized TiAl by plasma surface alloying

Plasma surface alloying of element Nb in TiAl-based alloys and the oxidation behavior were studied. The composition and microstructure of the surface alloyed layers were investigated by means of scanning electron microscopy （SEM）,energy dispersive X-ray analysis （EDX）,and X-ray diffraction （XRD）. The experimental results indicate that the diffusion layers are formed on the TiAl substrate during the plasma niobizing process. The result from oxidation resistance investigation shows that plasma niobizing greatly improves the oxidation resistance of TiAl compared with the untreated TiAl. The role of element Nb for improving the oxidation resistance is considered to be achieved by strengthening the activity of Al,which is induced by the plasma niobizing process.     

Oxidation behavior of niobized TiA1 by plasma surface alloying

Plasma surface alloying of element Nb in TiM-based alloys and the oxidation behavior were studied. The composition and microstructure of the surface alloyed layers were investigated by means of scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and X-ray diffraction (XRD). The experimental results indicate that the diffusion layers are formed on the TiAl substrate during the plasma niobizing process. The result from oxidation resistance investigation shows that plasma niobizing greatly improves the oxidation resistance of TiAl compared with the untreated TiAI. The role of element Nb for improving the oxida-tion resistance is considered to be achieved by strengthening the activity of Al, which is induced by the plasma niobizing process.     

N-油酰基吗啡啉体系中CdZnS三元量子点的合成——光谱性质及生长机理

以N-油酰基吗啡啉为溶剂,硬脂酸镉、硬脂酸锌和S粉为原料,采用高温热注射法合成了高质量的CdZnS量子点,用紫外-可见吸收光谱（UV-vis）,荧光发射光谱（PL）,高分辨透射电镜（HRTEM）和X射线粉末衍射仪（XRD）对量子点光谱性质、形貌、单分散性及物相结构进行了分析．结果表明,合成的CdZnS量子点为内富Cd外富Zn的组分梯度结构,改变原料中n（Zn）：n（Cd）或n（Zn＋Cd）：n（S）比可在较大波长范围内调节其吸收光谱,往反应体系中添加不同长链基团可实现更宽范围的光谱调节．     

一种低合金钢的冲击磨料磨损研究

本文对新研制的70Cr2SiMnMoVTiRE 低合金耐磨钢和高锰钢在冲击磨料磨损条件下的磨损行为进行了研究;借助 X 射线衍射仪、扫描电镜(SEM)、透射电镜(TEM)等手段,对试验钢的最佳耐磨组织、钢中残留奥氏体,以及冲击功和配对材料硬度等参数对磨损性能的影响,进行了较细致的分析和讨论,对冲击磨料磨损机理也作了相应的探讨.     

Plasma Surface Cu Alloyed Layer as a Lubricant on Stainless Steel Sheet:Wear Characteristics and On-job Performance in Incremental Forming

To solve the problems of poor forming and easy adhesion of the stainless steel,Cu alloyed layer on the stainless steels was prepared by the double glow plasma surface alloying technique.The experimentalresults indicated that the supersaturated copper dispersedly precipitated in grain interior and crystalboundaries and formed the vermicular structure.The tribologicaltests indicated that the friction coefficient of the Cu alloyed layer was lower than that of the stainless steels.The wear rate of stainless steelin the presence of Cu alloyed layer was approximately 2-fold lower than that in the absence of the alloyed layer.The results of the incrementalforming indicated that the ploughing phenomenon was not observed on the stainless steelin the presence of Cu alloyed layer during the incrementalforming,while the stainless steelpresented the deep ploughing.Therefore,Cu alloyed layer on stainless steelexhibited excellent self-lubrication and forming properties.