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渗稀土
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     Anode polarization test confirmed that its corrosion resistance exceeded that of stabilized 1Cr18Ni9Ti steel.
     阳极极化曲线的测定结果表明 ,扩渗稀土后的 1Cr18Ni9钢试样耐腐蚀性能超过了稳定化处理的 1Cr18Ni9Ti钢水平
短句来源
     Effect of Rare-earths Permeated by Surface Gas-phase on Intercrystalline Corrosiveness of Steel 1Cr18Ni9
     表面扩渗稀土(La、Ce)对1Cr18Ni9钢晶间腐蚀性能的影响
短句来源
     Effect of RE Gas-phase Permeation Treatment on the Surface Corrosion Resistance of 1Cr18Ni9 Steel
     扩渗稀土对1Cr18Ni9钢耐腐蚀性能的影响
短句来源
     Rare earths was permeated on the surface of 1Cr18Ni9Ti steel by the chemical method. Then the composition and structure of the surface were investigated by the X ray diffraction.
     利用化学法对 1Cr18Ni9钢表面扩渗稀土 ,通过X 射线衍射分析了试样表面的组织状态。
短句来源
     The effect of rare-earths (La, Ce) permeated in gas-plase on the intercrystallinecorrosiveness of steel 1Cr18Ni9 was investigated by the corrosion test such as sulfuric acid andsulfuric acidferric sulfate, scanning electron microscope(SEM) and electronic probe(EPMA). Theresults shown that, little lean chrome region exists in the surface of steel 1Cr18Ni9 treated byrarecarths, and its intercrystalline corrosiveness improves greatly, which exceeds that of stabilized1Cr18Ni9 steel.
     采用硝酸-硫酸铁腐蚀试验,扫描电镜(SEM)、电子探针(EPM)等方法研究了气相扩渗稀土(La、Ce)对1Cr18Ni9钢晶间腐蚀性能的影响.结果表明,扩渗后倒在面几乎不存在贫Cr区,耐晶同腐蚀性能明显改善,超过经稳定化处理的1Cr18Ni9Ti钢水平.
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  相似匹配句对
     CO-CEMENTATION OF ALUMINUM AND RARE EARTH ELEMENTS
     铝—稀土
短句来源
     Auxoacction of Terres Rares in Aluminum Impregnation
     稀土铝中的催作用
短句来源
     Rare Earth Superconducting Materials
     稀土超导材料
短句来源
     Thermistor of Rare Earth
     稀土热敏电阻
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In the present investigation a layer with fine grains was found on the surface of pure iron after RE infiltration. It was also found that the refinement for original grains would lead to the increase in case depth and the improvement on carburizing microstructure after RE carburizing of steels of 20, 45 and 20CrMnTi in two different grain sizes. Based on above results a model of boundary migration was given and the effect of RE on the grain boundary migration, carbon atom diffusion and precipitation was discussed....

In the present investigation a layer with fine grains was found on the surface of pure iron after RE infiltration. It was also found that the refinement for original grains would lead to the increase in case depth and the improvement on carburizing microstructure after RE carburizing of steels of 20, 45 and 20CrMnTi in two different grain sizes. Based on above results a model of boundary migration was given and the effect of RE on the grain boundary migration, carbon atom diffusion and precipitation was discussed.

实验发现,纯铁经渗稀土处理后,其表层出现一细晶粒区域。将两种不同晶粒尺寸的20、20CrMnTi及45钢经相同稀土碳共渗工艺处理后还发现,原始晶粒细化既可增加渗层深度,又可改善渗层组织。本文以此为依据设计了稀土渗入时的晶界迁移模型,并探讨了稀土对晶界迁移及对碳原子扩散与析出机制的影响。

The protected layer of oxide film with rare earths (RE) was formed by vapour co-pervade of elements La, Ce, C, N and B. In corrosion tests samples with RE is more corrosion-resistive than ordinary one. After being corroded for 10 h, there is no corrosive spot on samples with RE, and the ordinary one is almost covered with corrosive spots.

采用气体低温稀土多元共渗方法,研究了S_(20)A钢的耐蚀性.盐雾实验结果表明,未渗稀土样品2h出现锈斑,而渗稀土的样品10h也未出现锈斑.其它耐蚀性也有明显提高.

Developing situation of mould for refractory product,requirment for the properties of mould,and it's technical and economical comparision have been described. The three types of mould which are widedly used and have achieved better technical and economical benefits are:(1)earburizing carbon steel mould;(2)hard alloy and hard alloy mould;(3)high chromium cast iron mould.

叙述了耐火制品模具的发展、性能要求及技术经济比较。使用较广、技术经济效果较好的三种模具是:①碳钢气体碳氮共渗(稀土共渗)模具;②硬质合金和钢结硬质合金模具;③高铬铸铁模具

 
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