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double glow Plasma Surface Alloying Process Modeling Using Artificial Neural Networks

Journal of Materials Science & Technology 2003年第5期19卷 404-406页

作者： JiangXU XishanXIE ZhongXU HighTemperatureMaterialLabs SchoolofMaterialsScienceandEngineeringUniversityofScienceandTechnologyBejingBeijing100083China ResearchInstituteofSurfaceEngineering TaiyuanUniversityofTechnologyTaiyuan030024China

A model is developed for predicting the correlation between processing parameters and the technical target of double glow by applying artificial neural network (ANN). The input parameters of the neural network (NN) are source voltage, workplace voltage, working pressure and distance between source electrode and workpiece. The output of the NN model is three important technical targets, namely the gross element content, the thickness of surface alloying layer and the absorption rate (the ratio of the mass loss of source materials to the increasing mass of workpiece) in the processing of double glow plasma surface alloying. The processing parameters and technical target are then used as a training set for an artificial neural network. The model is based on multiplayer feedforward neural network. A very good performance of the neural network is achieved and the calculated results are in good agreement with the experimental ones.

关键词： double glow Artificial neural network Multi-element alloying

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XPS study of the corrosion resisting composite alloying layer obtained by double glow plasma with the brush plating Ni interlayer

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Journal of University of Science and Technology Beijing 2004年第2期11卷 151-156页

作者： JiangXu XishanXie ZhongXu WenjinLiu DepartmentofMechanicalEngineering TsinghuaUniversityBeijing100084China／MaterialsScienceandEngineeringSchoolUniversityofScienceandTechnologyBeijingBeijing100083China MaterialsScienceandEngineeringSchool UniversityofScienceandTechnologyBeijingBeijing100083China ResearchInstituteofSurfaceEngineering TaiyuanUniversityofTechnologyTaiyuan030024China DepartmentofMechanicalEngineering TsinghuaUniversityBeijing100084China

The Ni-Cr-Mo-Cu multi-element surface alloying with the electric brushplating Ni interlayer on the low carbon steel substrate has been investigated. By theelectrochemical method in 3.5 percent (mass fraction) NaCl solution, the corrosion resistance of thecomposite alloying layer and single alloying layer is determined. The experimental results showthat the corrosion resistance of the composite alloying layer is obviously better than that of thesingle alloying layer. The structure and composition of passive films formed on the two kinds ofalloyed layers after electrochemical tests in 3.5 percent NaCl solution have been studied usingX-ray photoelectron spectroscopy (XPS). It is concluded that the double glow plasma surface alloyingof low carbon steel with the electric brush plating Ni interlayer is an appropriate technique toenhance the corrosion resistance compared with the single double glow surface alloying.

关键词： double glow composite alloying XPS electric brush plating

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维普期刊数据库

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Surface Metallurgy of Nickle Base Superalloy

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 47-49页

作者： Xu Zhang Zhongmin Yang Jianxin Dong Xishan Xie Yuan Gao Zhong Xu (Material Science and Engineering school, University of Science and Technology Beijing, Beijing 100083, China)(Institute of Surface Engineering, Taiyuan University of Technology, Taiyua Material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China Institute of Surface Engineering Taiyuan University of Technology Taiyuan 030024 China

The double glow Plasma Surface Alloying Technique, the Xu-Tee Process, is a new method to produce high quality alloying layer on the surface of less expensive materials. By using thes technique, the surface alloying layer similar to superalloy Inconel 625 has been obtained on the surface of three kinds of melallic materials (low carbon steel, industrial pure iron, stainless steel Cr18Ni9). The results of the composition and microstructure analyzed by Scanning Electron Microscopy (SEM) and X-Ray Uffrachon (XRD) show that the alloying layer consistS of y matrix and several precipitates (Laves intermetallic phase and carbide etc.). The electrochemical corrosion results show that the surface alloying layer formed on the surface of stainless steel and industrial pure iron have better corrosion resistance than that of nickel base alloy inconel 625 and stainless steel Cr18Ni9 in 3.5%NaCl solution. The exper iments indicate that it is an effective way to obtain the gradient surface alloying layer on the surfaces of steels by using double glow Plasma Surface Alloying Technique.

关键词： double glow nickel base alloy plasma surface alloying

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