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on the particles behaviors. The result shows that Fe-TiB2/Al2O3 composite coating has a high potential for abrasive wear applications. Key words: metallic powder; ceramic powder; cored wire; arc spraying... facilities, and on the other hand on development of innovative feedstock, which fulfills the markets demands. Materials that can be sprayed are metallic wire (iron, aluminum) or cored wire containing......
inhibited and the wettability of molten pool is improved by adding Ti-Si-Mg-Al flux-cored wires. With 15Ti-5Si-5Mg-Al flux-cored wire as filled composite, the maximum tensile strength of the welded joint is 267 MPa, which is up to 83% that of the matrix composites under annealed condition. Key words: plasma arc; in-situ welding; aluminium matrix composites; Ti-Si-Mg-Al flux-cored wire 1 Introduction......
基于PSO的Live Wire交互式图像分割算法依玉峰1,高立群1,崔兆华1,史圣伦21. 东北大学信息科学与工程学院2. 东北财经大学会计学院摘 要:传统Live Wire算法易受伪轮廓干扰,并且算法执行速度较慢.针对这些问题,提出一种基于PSO的Live Wire交互式图像分割算法.算法首先构造新的代价函数,引入相邻节点间梯度幅值变化函数来减轻伪轮廓的干扰,提高了算法的分割精度;其次,为了提高算法的执行效率,应用粒子群算法求取图像中任意两点间最短路径来定位目标边界,并与经典的基于Dijkstra动态规划图搜索的Live Wire算法进行比较.实验结果表明,与传统方法相比,所提算法在分割精度和执行效率上都有很大提高.关键词:Live Wire算法;图像分割;粒子群优化;最短路径......
高速电弧喷涂FeMnCr/Cr_3C_2涂层抗高温冲蚀磨损性能 孙乃荣1,刘少光2,俞佳3,罗来马3,郦剑3,赵琪1 (1.江苏科技大学,江苏,镇江,212003;2.温州科得力新特材料有限公司,浙江,温州,325029;3.浙江大学,浙江,杭州,310027) 摘要:针对超临界锅炉管道的严重冲蚀磨损问题,采用高速电弧喷涂技术在20钢表面制取耐磨涂层,并研究其高温冲蚀磨损特性.采用场发射扫描电子显微镜和X射线能谱分析等方法探讨涂层的冲蚀磨损规律.结果表明,FeMnCr/Cr_3C_2涂层最大冲蚀率出现在冲击角60°附近,表现出半塑性冲蚀磨损特征;其耐高温冲蚀性与FeCrNi/Cr_3C_2涂层相近,明显优于20钢. 关键词:FeMnCr/Cr_3C_2粉芯丝材; 高速电弧喷涂; 抗高温冲蚀磨损; FeMnCr/Cr_3C_2 cored wire; high-velocity......
in the water directly. Lincoln SW-707 self-shielded flux cored wire of 2.0 mm diameter was used to deposit bead-on-plate welds on Q235B steel plates with dimensions of 200 mm×40 mm× 8 mm. The chemical... in Table 2. Fig. 1 Schematic illustration of underwater wet FCAW system Table 1 Chemical composition of Lincoln SW-707 self- shielded flux cored wire Fig. 2 Weld bead appearances of underwater wet......
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Effect of coating material and lubricant on forming force and surface defects in wire drawing process S. M. BYON1, S. J. LEE2, D. W. LEE1, Y. H. LEE3, Y. LEE2 1. Department of Mechanical Engineering, Dong-A University, Busan, 604-714, Korea; 2. Department of Mechanical Engineering, Chung-Ang University, Seoul, 156-756, Korea; 3. Wire Rod Research Group, POSCO Technical Research Laboratories......
Temperature effect in thermosonic wire bonding WU Yun-xin(吴运新), LONG Zhi-li(隆志力), HAN Lei(韩 雷), ZHONG Jue(钟 掘) School of Electromechanical Engineering, Central South University, Changsha 410083... in a bonding process more clearly and completely. The analysis shows that the bonding parameters influence mutually. These results can help build some criteria for parameter match and optimization in wire......
Measurement of metal vapor cooling speed during nanoparticle formation by pulsed wire discharge Yuu SHIKODA1, Yoshinori TOKOI2, Koji SUWA1, Satoru ISHIHARA3, Tsuneo SUZUKI1, Tadachika...; Abstract: Pulsed wire discharge(PWD) is one of nano-sized powder production methods. The object of this work is to study influence......
Factors governing heat affected zone during wire bonding SUN Li-ning(孙立宁)1, LIU Yue-tao(刘曰涛)1, 2, LIU Yan-jie(刘延杰)1 1. State Key Laboratory of Robotics and System, Harbin Institute of Technology...; Abstract: In the wire bonding process of microelectronic......
