Western Metal Materials Co.

Fengcheng, China

Western Metal Materials Co.

Fengcheng, China
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Sun S.Y.,Western Metal Materials Co. | Sun S.Y.,CAS Shenyang Institute of Metal Research | Hao Y.L.,CAS Shenyang Institute of Metal Research | Li S.J.,CAS Shenyang Institute of Metal Research
Ti 2011 - Proceedings of the 12th World Conference on Titanium | Year: 2012

The Ti-Nb(5Sn)-(5Zr) titanium alloys with large-scale Nb gradients were prepared by diffusion couple method. Combining chemical composition evaluated by EDX and the corresponding Young's modulus measured by indentation method, the effects of Nb content and Sn and Zr additions on Young's modulus of Ti-Nb(5Sn)-(5Zr) alloys were investigated. The results showed that as the Nb content ,Young's moduli exhibit "W" or distorted "W" shaped curve,and Zr and Sn are efficient elements to decrease elastic modulus of Ti-Nb based alloys.


Wang A.,Xi'an University of Science and Technology | Wang A.,Shandong University | Ma X.,Western Metal Materials Co. | Lu Y.,Shandong University | And 2 more authors.
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2010

The microstructure, size distribution, specific surface area, and pore size distribution were characterized by the scanning electron microscope, laser diffraction particle size analyzer and specific surface area analyzer, respectively. The results indicate hydroxyapatite (HA) particles have a regular spherical shape, narrow particle size and pore size distribution. Its specific surface area is 44.135 m2/g, and its total pore volume is 0.2911 cm3/g. The HA column was prepared using the slurry packed method, and its characteristics was evaluated through high performance liquid chromatograph. The results imply that the column has a high efficiency.


Wang L.-L.,Shaanxi University of Science and Technology | Wang X.-F.,Shaanxi University of Science and Technology | XuDing,Western Metal Materials Co. | Zhu J.-F.,Shaanxi University of Science and Technology
Science of Sintering | Year: 2012

The bioglass modified HA-Al2O3 composites were successfully fabricated by mixing HA, synthesized by wet chemical method between precursor materials H3PO4 and Ca(OH)2, with 25wt% Al2O3 and different content of bioglass (5%, 25%, 45%, 65wt%) respectively, with a mole fraction of 53.9%SiO2, 22.6%Na2O, 21.8%CaO, and 1.7wt%P2O5, sintered in air at various temperatures (750-950°C) for 2h. when the content of bioglass is below 45wt% in the composite, HA decomposes completely and transforms to β-TCP. The main phase in this case are β-TCP, Al2O3 and Ca3(AlO3)2.When the content of bioglass is above 45wt% in the composite, the decomposition of HA to β-TCP is suppressed and the main phases in this case are Al2O3 and HA, DCP CaHPO4 and β-TCP, which almost have the same chemical composition, forming ternary-glass phase, and have better bioactive than pure HA. It can also be found that at the certain addition of bioglass, the higher sintered temperature, the bigger volume density and flexural strength of the composite are, but when the sintered temperature reaches 950°C, they decrease. This modified HA-Al2O3 composites by calcium silicate glass have a much lower sintering temperature and decrease the production cost much.


She Y.,Shaanxi University of Technology | Zhang Z.H.,Shaanxi University of Technology | Ju J.T.,Shaanxi University of Technology | Jin B.,Western Metal Materials CO.
Materials Science Forum | Year: 2015

The continuous cooling phase transformation behavior of niobium microalloyed steel was studied by Thermecmastor-Z thermomechanical simulator; the continuous cooling transformation curves (CCT) were established. The change of microstructure under different cooling rates was observed, and the influence of deformation in austenite non-recrystallization region on transformation was discussed. Based on these work, it was possible to know that the phase transformation is retarded and the ferritic grain is refined dramatically as the cooling rate increasing. The deformation in austenite non-recrystallization region caused deformation stored-energy, which improved the grain refinement of transformation to some extent, but not significant. © (2015) Trans Tech Publications, Switzerland.


Qi F.-Q.,Shaanxi University of Science and Technology | Jing X.-D.,Shanghai Institute of Technology | He K.,Western Metal Materials Co.
Procedia Engineering | Year: 2011

The control system uses LABVIEW as the software development platform. The system includes ADLINK motion control card PCI-8134, LEETRO stepper motor drivers DMD 402A, and tables with LEETRO DM4240A stepper motors. The system uses ADLINK PCI-8134 to send stepping pulse signal PUL and direction level signal DIR to control the stepper motor's rotation angle and direction, achieving the motor' positive and negative rotation, acceleration, constant speed and deceleration, then achieving the radial motion of table's Z-axis slider along the surface of the measured part, the axial motion of X-axis slider along the surface of the measured part and the spindle rotation for the measurement of roundness and cylindricity. © 2011 Published by Elsevier Ltd.


Wang L.-L.,Shaanxi University of Science and Technology | Wang X.-F.,Shaanxi University of Science and Technology | Ding X.,Western Metal Materials Co. | Jiang H.-T.,Shaanxi University of Science and Technology
Materials and Manufacturing Processes | Year: 2013

HA-Bioglass-Al2O3 composites were successfully fabricated by mixing HA, synthesized by wet chemical method between precursor materials H3PO4 and Ca(OH)2, with 25 wt% Al2O3 and different content of bioglass (5, 25, 45, and 65 wt%), respectively, with a mole fraction of 53.9%SiO2, 22.6%Na 2O, 21.8%CaO, and 1.7 wt%P2O5, sintered in air at relative low temperature (750-950°C) for 2 h. It can be seen that when the content of bioglass is above 45 wt% in the composite, the decomposition of HA to β-TCP, considerable thermal reaction and phase degradation are suppressed, and the main phases in this case are Al2O3, HA, and a small amount of DCP (CaHPO4) and β-TCP, which almost have the same chemical composition, forming ternary-glass phase, and have better bioactive than pure HA. It can also be found that the exposed HA particles increase with the increasing of the bioglass content in the mixture. A large number of HA particles stacked together are subjected to form roughened surface, wherein microcracks, voids, and pores are observed, suggesting that pressureless-sintering is not the best way for densification of HA-Bioglass-Al2O3 composite. © Taylor and Francis Group, LLC.


Shi X.-C.,Western Metal Materials Co. | Zhou K.,Northwest Institute for Nonferrous Metal Research | Yang J.-H.,Western Metal Materials Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2010

A novel method for simultaneous determination of impurities of oxygen and nitrogen in NbTi alloy by impulse heating inert gas fusion method was developed (oxygen by infrared determination, and nitrogen by thermal conductivity). The effect of fluxes, heating power and the ratio of sample to flux on determination results were studied. Oxygen and nitrogen in NbTi alloy were determined with analytical power of 5.3 kW and the ratio of sample to flux of 1:20 using nickel as flux. The relative standard deviations (RSD) for oxygen and nitrogen were 3.0% and 5.9%, respectively. The standard addition recoveries for oxygen and nitrogen were 91%-117% and 90%-98%, respectively.


Zhang B.,Xi'an University of Architecture and Technology | Wang K.-S.,Xi'an University of Architecture and Technology | Sun Y.-J.,Jinduicheng Molybdenum Co. | Wang S.,Western Metal Materials Co.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2011

The Cu/Mo/Cu cladding metal materials were made by hot rolling. The interface structure, fracture characteristic and the effect of rolling process parameters on bond strength were studied by optical microscope, scanning electron microscope and electron-tensile tester. The results show that the bonding interface of composite materials is tight when deformation rate is 55% for a pass with heat-treatment at 750°C for 8 min, the maximum value of shearing strength is 77 MPa. The micro-structure of Mo layer is compressed fibrous and uniform distribution. The micro-structure of Cu layer is isometric crystal. The grain size is increased from the interface to the surface, and unevenly distributed. The mechanism of bonding is typically split bonding and mechanical interlocking.


Shi X.-C.,Western Metal Materials Co. | Yang J.-H.,Western Metal Materials Co. | Li H.-Y.,Western Metal Materials Co. | Liu H.-Y.,Western Metal Materials Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2013

The sample was digested by aqua regia in oven at 180°C for 12 h. Then, 10 mL of 100 g/L lanthanum chloride solution and 10 mL of 100 g/L copper sulfate solution were added as releasing agent. Consequently, iridium in platinum-iridium alloy was determined by flame atomic absorption spectrometry (FAAS). The results showed that, the concentration of iridium in the range of 15-100 μg/mL exhibited good linear relationship to the absorbance. The linear regression equation was A=0.00083ρ+0.0015 with correlation coefficient of 0.9995. The detection limit of method was 0.0028 μg/mL. This method was applied to the determination of iridium in Pt25Ir and Pt10Ir samples, and the recovery test was conducted by addition of iridium standard solution. The relative standard deviation (n=11) was 1.6% and 2.3%, respectively. The recoveries were between 95% and 101%.


Lei W.,Northwest Institute for Nonferrous Metal Research | Mao X.,Northwest Institute for Nonferrous Metal Research | Lu Y.,Northwest Institute for Nonferrous Metal Research | Hou Z.,Northwest Institute for Nonferrous Metal Research | And 2 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2011

The quenching process of TC21 titanium alloy forging was simulated by ANSYS finite element analysis software, and the temperature field and the thermal stress field of TC21 titanium alloy forging at different quenching time were obtained, as well as the relationship between the temperature and stress of selected nodes and quenching time. Moreover, the change of microstructure from the forging center to the edge was observed in order to study the effect of cooling rate on the microstructure change. The results show that when the quenching time reaches to 3600 s, the forging surface has cooled to room temperature, while the forging center still maintains a high temperature; the cooling rate increases continually from the forging center to the surface, and the microstructure becomes much finer with the distance from the surface decreasing. At the beginning of quenching, the thermal stress of all parts of the forging rises to the peak rapidly, and then the thermal stress of the surface and the center decrease gradually with the quenching time increasing. The maximum residual stress is only 77 MPa at the end of quenching. Copyright© 2011, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV.All rights reserved.

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