Anhui Engineering Laboratory of Non Ferrous Metals and Processing

Hefei, China

Anhui Engineering Laboratory of Non Ferrous Metals and Processing

Hefei, China
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Wu Y.-C.,Hefei University of Technology | Wu Y.-C.,Anhui Engineering Laboratory of Non ferrous Metals and Processing | Xia C.-C.,Hefei University of Technology | Li M.,Anhui Engineering Laboratory of Non ferrous Metals and Processing | And 3 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2016

The traditional machining processes was replaced by spinning processes to produce multi-wedge belt pulley.To avoid the cracking gap and flash defects in physical spinning experiments,the material flow,stress distribution and defects formation mechanism in the deformed area were analyzed by using finite element simulation.The result shows that,during the process of thickening formation of multi-wedge belt pulley,the material flow velocity in end region is lower than that in mouth region,which leading material accumulation in end region and forming flash. There is lack of materials at the intersection of the side wall and end region and the maximum radial stress,circumferential stress and axial stress all surpass the tensile strength of the materials which causing the spinning gap.Through adding a concave preforming spinning roller and improving the spinning process,the spinning gap and flash is removed for the experiments on CDC-S80 spinning machine. © 2016, Editorial Board of Journal of Plasticity Engineering. All right reserved.


Wang W.-F.,Hefei University of Technology | Wang W.-F.,Anhui Engineering Laboratory of Non Ferrous Metals and Processing | Wu W.-Y.,Hefei University of Technology | Wu W.-Y.,Anhui Engineering Laboratory of Non Ferrous Metals and Processing | And 2 more authors.
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2011

AgCu20Ni2 supersaturated alloy powders were prepared by mechanical alloying and AgCu20Ni2 alloy was fabricated by method of powder metallurgy using the powders. Microstructure, physical properties of the AgCu20Ni2 alloy was examined, and the effect of sintering process and cold deformation on properties of the alloy was also discussed. The results show that the nanocrystalline AgCu20Ni2 alloy powders are obtained after high energy milling for 30 h. The microstructure of AgCu20Ni2 alloy consists of Ag-rich-α matrix and precipitates β phase which disperse uniformly in the matrix strengthening the alloy. SEM observation and EDS analysis of fracture surface show that the AgCu20Ni2 alloy exhibits ductile fracture features under bending loading.


Wu W.-Y.,Hefei University of Technology | Wu W.-Y.,Anhui Engineering Laboratory of Non Ferrous Metals and Processing | Wang W.-F.,Hefei University of Technology | Wang W.-F.,Anhui Engineering Laboratory of Non Ferrous Metals and Processing | And 4 more authors.
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | Year: 2011

The X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to analyze the formation of supersaturated Ag90Ni10 phase and the effect of adding rare earth Sm and alloy element Cu on the mechanical alloying process. The change of the lattice parameters and grain size for all the supersaturated powders after annealed were also measured. Then the microstructure, density, hardness and resistivity of the samples were measured after being prepared by the method of powder metallurgy. The results of the precise determination of the lattice parameters by XRD showed that after mechanical alloying for 60 hours, the nanocrystalline Ag-Ni powders were obtained and the maximum solid solubility of Ni in Ag was reached 2.87at%. Both the rare earth Sm and alloy element Cu could accelerate the mechanical alloying process, reduce the ultimate grain size of powders, especially the Sm. The alloy element of Cu could improve the density, hardness and conductivity of the alloy.

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