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等离子辉光合成TiN渗镀层耐腐蚀性能的研究 总被引:1,自引:0,他引:1
介绍了一种同时利用等离子尖端放电、空心阴极效应和反应气相沉积技术,在碳钢表面形成具有扩散层和沉积层的TiN渗镀层新工艺技术.将该TiN渗镀试样与1Cr18Ni9Ti不锈钢和Q235钢在1 mol/LH2SO4溶液和3.5%NaCl溶液中,分别进行电化学腐蚀对比试验.结果表明:TiN渗镀层在酸性溶液中的耐蚀性能比1Cr18Ni9Ti不锈钢和Q235钢分别提高了1.4和4.2倍.在盐水中的耐蚀性能比Q235钢提高了182.6倍,但比1Cr18Ni9Ti不锈钢耐蚀性能稍差.渗镀TiN层耐酸性溶液腐蚀性能优于耐盐水腐蚀性能. 相似文献
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采用等离子合成TiN渗镀层方法,在碳钢表面形成TiN沉积层+含TiN的扩散层组织,Ti和N原子由表及里呈梯度分布,表面是均匀、致密的TiN胞状组织,显微硬度在20 GPa~25 GPa之间;沉积层与基体之间有一扩散过渡区,结合力好,无剥落现象.X射线衍射结果表明:渗镀层表面为TiN层,(200)晶面的衍射峰最强,具有明显的择优取向.将TiN渗镀试样与不锈钢1Cr18Ni9Ti和Q235钢在1 mol/L H2SO4溶液中进行电化学腐蚀对比实验表明:TiN渗镀层的耐蚀性能比不锈钢和Q235钢基体分别提高了1.4和4.2倍.
相似文献
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等离子辉光TiN复合渗镀层结构与性能的研究 总被引:2,自引:0,他引:2
利用等离子渗金属技术、尖端放电、空心阴极效应和反应气相沉积技术,在碳钢表面形成具有扩散层和沉积层的新型复合渗镀TiN沉积层+TiN析出相+Ti扩散层,并与等离子渗镀TiN,Ti层以及在碳钢基体表面直接用PVD法沉积TiN薄膜的表面形貌、结构、耐蚀性进行了检测和分析。结果表明:等离子渗镀的复合渗镀TiN/Ti层表面为均匀起伏的胞状物,Ti和N原子由表层呈梯度沿基体向内分布,属于冶金扩散层;用等离子渗金属技术等形成的复合渗镀TiN沉积层+TiN析出相+Ti扩散层,其表面形貌是为均匀、致密、细小的组织,平均硬度达到2500HV0.1左右,渗镀层厚度达十几微米,TiN层择优取向为(200)晶面;而PVD法直接沉积TiN薄膜厚度较薄,晶粒以不规则形式分布在基体上。在0.5mol/L H2SO4溶液中腐蚀性能表明,复合渗镀TiN沉积层+TiN析出相+Ti扩散层的耐蚀性较好。 相似文献
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双辉多元共渗与电刷镀复合表面耐蚀渗镀层的研究 总被引:4,自引:0,他引:4
在20钢表面电刷镀快速Ni层作为过渡层,然后采用双层辉光离子技术将Ni-Cr-Mo-Cu合金进行多元共渗,对形成的复合镀层在5%HCl溶液中进行了电化学腐蚀性能测试,利用XRD,扫描电镀以及EDX对渗层的组织结构和合金元素及碳元素在渗层中的分布进行了分析,结果表明;预先刷镀快速Ni镀层再进行双层辉光多元渗Ni-Cr-Mo-Cu的复合渗镀层的耐蚀性能明显优于双辉多元渗Ni-Cr-Mo-Cu以及单独电刷镀Ni镀层的耐蚀性能,分析认为,由于双辉多元共渗中的温度效应,使层复合渗镀层具有较好的耐蚀性能。 相似文献
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Ti2AlNbO相合金双层辉光等离子渗Mo摩擦性能 总被引:2,自引:0,他引:2
利用双层辉光等离子表面冶金技术对Ti2AlNbO相合金进行渗Mo工艺研究。采用扫描电子显微镜、辉光放电光谱分析仪、X射线衍射仪和显微硬度计测试了渗Mo层的微观组织、化学成分、相组成和显微硬度。采用可控气氛微型摩擦磨损实验仪进行耐磨性研究。在最佳工艺参数下,渗Mo层可达100μm,表面Mo含量超过90%,且从表面到心部呈梯度分布。渗Mo层主要由纯Mo及Al5Mo相组成,硬度HV达8000MPa,渗Mo试样的平均摩擦因数为0.085,较Ti2AlNb基材降低6倍,磨损率仅为基材的7.5%。结果表明:Ti2AlNbO相合金表面的耐磨性能得到极大地提高。 相似文献
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双辉离子渗钨钼层渗碳组织的电镜分析 总被引:3,自引:1,他引:3
采用双志了子渗金属技术,首先在低碳钢表面渗入合金元素钨、钼,然后作固溶处理,使金属间化合物溶于基体中,接着渗碳,使合金层内形成在碍区弥散、均匀、细小的合金碳化物。经淬及回火后的合金层具有高速钢组织及性能。对渗透了金属层渗碳后的组织进行了电子分析 相似文献
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等离子铬镍共渗层与氮化钛薄膜的耐蚀性 总被引:1,自引:0,他引:1
对低碳钢表面进行等离子铬镍共渗,在4Cr13不锈钢表面沉积氮化钛薄膜.对两种强化层及其基体进行电化学腐蚀性能测试.结果表明:在1 mol/L的H2SO4溶液中,铬镍共渗试样的耐腐蚀程度和氮化钛薄膜的相当,是4Cr13不锈钢试样的90倍,是低碳钢试样的120倍;在1 mol/L的NaOH溶液中,铬镍共渗试样的耐腐蚀性是4Cr13不锈钢试样的0.67倍,是低碳钢试样4.67倍,是氮化钛薄膜的3.67倍;在3.5%的NaCl溶液中,铬镍共渗试样的耐腐蚀性是低碳钢试样的2.3倍,是氮化钛薄膜的0.167倍,是4Cr13不锈钢试样的0.33倍. 相似文献
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A binary Fe-Al alloyed layer was synthesized on 45 steel by means of double glow plasma surface alloying technique. The corrosion-resisting layer prepared is composed of a sedimentary layer and a diffusion layer, with a total thickness of about 180 μm. The aluminum content of the alloyed layer shows gradual change from surface to the inside of substrate. The ideal profile is beneficial to the metallurgical bonding of the surface alloying layer with substrate materials. The microstructure of both layers consists of the Fe-Al intermetallic compound, which is FeAl with B2 structure in the sedimentary layer and Fe3Al with incompletely ordered DO3 structure in the diffusion layer. The protective film exhibits high micro-hardness. In comparison with the substrate of 45 steel, the corrosion resistance of the aluminized sample is much higher in 2.0% Na2S and 0.05 mol/L Na2SO4 + 0.5 mol/L NaCl mixed solutions. 相似文献
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201不锈钢离子渗氮和离子镀TiN复合强化层的耐蚀性 总被引:2,自引:0,他引:2
对201不锈钢进行离子渗氮+离子镀TiN复合强化处理.并对复合强化层进行物相分析、截面形貌观察、硬度检测以及电化学腐蚀性能测试.结果表明:复合强化层的外层为厚度1.2μm的致密TiN层,中间为厚度约20μm的渗氮层,向内为基体.复合涂层物相主要为:TiN、Ti、CrN、Ni3N、Fe3N、Fe7C3.TiN复合涂层在3.5%的NaCl溶液中耐蚀性与201不锈钢基体相当,在1 mol/L的NaOH溶液中的耐蚀性比201基体提高了7倍,在1 mol/L的H2SO4溶液中的耐蚀性比201基体提高了14倍. 相似文献
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A special target structure for erbium (Er)-zirconium (Zr) co-deposition is proposed, based on the hollow cathode effect. To study the effect of rare earth on the alloyed layer, Zr-Er alloyed layers with different quantity proportion of Er and Zr elements were prepared on Ti-based substrate using double glow plasma surface alloying. The microstructure and composition of the alloyed layers were analysed by XRD and SEM-EDS. Results showed that Er element grows perpendicular to the Ti-based substrate in the alloyed layers, and it was found that the growth structure had an opposite effect on the diffusion of the Zr element. Interestingly, as the concentration of Er element increases, the addition of Er element to a certain extent affects the crystallisation of the Zr-Er alloyed layer and reduces the diffusivity of the Zr element. 相似文献
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The surface of pure copper alloyed with Ti using double glow discharge process was investigated. The morphology, structure and forming mechanism of the Cu-Ti alloying layer were analyzed. The microhardness and wear resistance of the Cu-Ti alloying layer were measured, and compared with those of pure copper. The results in-dicate that the surface of copper activated by Ar and Ti ions bombardment is favorable to absorption and diffusion of Ti element. In current experimental temperature, as the Ti content increases, the liquid phase occurs between the deposited layer and diffused layer, which makes the Ti ions and atoms easy to dissolve and the thickness of Cu-Ti al-loying layer increase rapidly. After cooling, the structure of the alloying layer is composed of CuTi, Cu4Ti and Cu(Ti) solid solution. The solid solution strengthening and precipitation strengthening effects of Ti result in high surface hardness and wear resistance. 相似文献
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纯铜离子渗镀钛层的耐蚀性 总被引:3,自引:1,他引:3
采用加弧辉光离子渗镀技术, 实现了在纯铜表面形成均匀的渗镀钛层. 用电化学测试技术对渗镀层在0.5moL/LH2SO4溶液中的耐蚀性进行了对比试验研究. 结果表明渗镀钛层的耐蚀性能大大提高, 与钛板相当, 并对渗镀层钛浓度的分布、渗镀层显微硬度、渗镀层相的结构进行了测定. 相似文献