Wang Y.,North University of China |
Wang J.,North University of China |
Wang J.,Shanxi Taigang Stainless Steel Co. |
Zhang X.-F.,North University of China |
Liu Y.-Q.,North University of China
Key Engineering Materials | Year: 2017
La-Nd co-doped barium hexaferrites, Ba0.7(LamNdn)0.3Fe12O19 (D-BaM), were successfully prepared by sol-gel method. PANI / D-BaM composites were synthesized by in-situ polymerization in solution. The structure, morphology and properties of samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), four-probe conductivity tester and vector network analyzer. The XRD patterns showed that the crystal structure of all the samples exist as M-type phases. The SEM images revealed that the particles presented a hexagonal platelet-like morphology. The magnetic properties could be improved by substitutions of La and Nd ions. The saturation magnetization (Ms) and coercive force (Hc) increased with the change of La / Nd ratio to the maximum at La / Nd = 3:1. The doped particles have also been embedded in conductive PANI to prepare electromagnetic materials, and the conductivity kept on the order of 10-2. The microwave absorbing properties of composites at 30 MHz-6 GHz improved obviously, the peak value of reflection loss could reach -7.5 dB. © 2017 Trans Tech Publications.
Zhao H.-Y.,Shanxi Taigang Stainless Steel Co Ltd
Journal of Iron and Steel Research | Year: 2012
Experiments of melting Inconel 690 by three different kinds of crucible material MgO, CaO, Al 2O 3 in 200 and 500kg VIM (Vacuum induction melting) were done. Sulfer and oxygen content ,oxidate sizes and number of the products were analyzed to study the effect of crucible material on purity of Ni-based alloy Inconel 690 melted by VIM. The results show that the oxygen content of product is lowest by melting in Al 2O 3 crucible, achieving (10 15) × 10 -6; There are 5 - 10μm D type oxidates amd less than 50 μm B type oxidates in the ingot, the purity is high. The sulfer content of product is lowest by melting in CaO crucible, achieving 10× 10 -6, the average oxygen content is 33×10 -6, there are lots of fine 5 -l0 μm D type oxidates and some 50 -100 μm Ca-aluminate oxidates; The oxygen and sulfer content in the ingot melted by MgO crucible is 28 × 10 -6 and 55 ×10 -6 respectively. There are lots of B type oxidates larger than 50 μm. Therefore, the Al 2O 3 crucible is the best choice to produce Inconel 690 by VIM.
Li Q.,Shanxi Taigang Stainless Steel Co.
Kang T'ieh/Iron and Steel | Year: 2013
The relationships among rotation speed of main exhaust fan, air volume, sintering machine speed and FFS (front flame speed) was analyzed and the sinter production process was stabilized by adjusting the rotation speed of new adapted converter controlled main exhaust fan. A FFS-based automatic control system for rotation speed of main exhaust fan was developed. The stability of FFS was remarkably improved and burn-through point (BTP) was stabilized at the penultimate wind box. Under the assistance of this system in the sintering plant of TISCO, the stability rate of BTP in the penultimate wind box is up to 98.1%, which is 35.5% higher than manual control, while the rate of return fine was reduced by 3.46%. The advantage of the converter controlled main fan can be enhanced by the system. The power consumption of the main exhaust fan can be reduced by 28.6%, comparing to power frequency running.
Zhang G.,Taiyuan University of Technology |
Zhao Y.,Harbin University of Science and Technology |
Liu C.,Shanxi Taigang Stainless Steel Co.
Communications in Computer and Information Science | Year: 2011
According to the function of recycled water in Center Air-condition Set and the run mode of recycle pumper, this paper proposes the method of power saving, discusses the corresponding structure of automation control system, draws up the control system block diagrams for the temperature control and pressure control, describes the system configuration for hardware, as well as provides the method in programming for the temperature data sampling, digital filter, digital controller and etc. © 2011 Springer-Verlag.
Wang F.,Shanxi Taigang Stainless Steel Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2016
The composition inhomogeneity of certified reference materials/samples for instrumental analysis was mainly caused by macrosegregation in casting process. The prediction of possible macrosegregation in cast ingot was the precondition and foundation for the initial homogeneity inspection of certified reference materials/samples. Based on the analysis and discussion on basic conception of initial homogeneity inspection, the certified reference materials/samples for instrumental analysis were classified into four types according to casting and formation processes, i.e., cast ingot-forging rolling type, continuous casting-forging rolling type, multi-cast ingots type and multi-cast ingots cutting type. Under the guidance of redistribution theory of solute atoms in solidification process, the macrosegregation characteristics formed in various casting processes were analyzed and investigated. The segregation types which should be paid attention in initial homogeneity inspection were proposed. The study provided the basis for making sampling plan in initial homogeneity inspection. © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved.
Yang Z.-R.,Shanxi Taigang Stainless Steel Co.
Kang T'ieh/Iron and Steel | Year: 2015
Based on production, operational furnace profiles monitoring and maintenance of two blast furnaces (BFs) with volume of 4350 m3 in TISCO, it was found that there was the interaction between upper and lower operational furnace profiles. What's more, it had an influence on hearth life. The upper operational furnace profile was affected by bosh gas volume, shaft refractory selection and flow direction of shaft cooling water. It was helpful to formed reasonable upper furnace profile by appropriate bosh gas volume, decreased gas channel between cooling plates and lining bricks and divisional cooling of horizontal shaft cooling water. There was the interaction between shaft middle operational furnace profile and thickness of skull. The operational furnace profile above tuyere also had the interaction with erosion and accretion of hearth bottom. In order to improve and maintain reasonable operational furnace profiles, the breathability and permeability of deadman should be maintained. The hard extruding repairing and furnace protection of schreyerite could also be utilized. Therefore, The operation indicators of furnace condition could be improved and the hearth erosion could be constrained by above measures. For the long life of hearth bottom, some measures are taken including the design, material selection and masonry of hearth bottom based on the new. ©, 2014, Chinese Society for Metals. All right reserved.
Zhao J.,Shanxi Taigang Stainless Steel Co. |
Hu J.-C.,Shanxi Taigang Stainless Steel Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2015
0.100 0 g of sample was dissolved with 10 mL of nitric acid (1+1) by heating from low temperature to boiling. Based on the optimization of instrumental parameters, the mass spectrometry interference was avoided by selecting proper isotope, and the calibration curve was plotted by standard addition method to eliminate the matrix effect. Consequently, a determination method of arsenic, tin, antimony, lead and bismuth in high-purity nickel plate was established by inductively coupled plasma mass spectrometry(ICP-MS). The correlation coefficient of calibration curve for each element was between 0.999 2 and 0.999 9. The detection limit of method was 0.009-0.047 μg/g. The proposed method was applied to the analysis of high purity nickel plate actual sample. The relative standard deviation (RSD, n=9) was 2.4%-5.4%, and the recoveries were between 95% and 106%. The determination results of high purity nickel plate actual sample were consistent with those obtained by atomic absorption spectrometry (AAS). ©, 2015, Central Iron and Steel Research Institute. All right reserved.
Wang Z.,Shanxi Taigang Stainless Steel Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2012
Influence of microalloying on microstructure and mechanical properties of large size Q345E forging material were investigated by adding microalloying elements in the steel. The results show that with the microalloying element increasing, the microstructure refines and the strength of the steel increases, but the elongation and the impact toughness decrease. The steel with 0.03% vanadium content and 0.03% niobium content can obtain optimal match of plasticity and toughness after normalized at 910°C, the impact work under -40°C is over 100 J.
Wang J.Q.,CAS Shenyang Institute of Metal Research |
Dong P.,CAS Shenyang Institute of Metal Research |
Dong P.,Shanxi Taigang Stainless Steel Co. |
Hou W.L.,CAS Shenyang Institute of Metal Research |
And 2 more authors.
Journal of Alloys and Compounds | Year: 2013
Centimeter-scale Al85Ni5Y6Co 2Fe2 bulk metallic glass composites were fabricated by warm extrusion of gas-atomized amorphous powders. Thermal behavior and microstructure of both the starting powders and the extruded samples formed with different extrusion ratios were studied in detail. The viscosity dependence of the powders on temperature was analyzed by calculation. The result demonstrated that the viscosity decreases steeply near the glass transition temperature and the minimum viscosity value calculated is about 1.37 × 108 Pa s at 550 K. Those have been confirmed by the viscous flow in warm extrusion around such a temperature. The compacts consolidated at 550 K under various extrusion ratios from 6.8 to 15.7 yielded nanostructured α-Al/glassy matrix composites with high hardness. The appearance of such a devitrified structure is thought to be related to the deformation-induced temperature rise during extrusion. © 2012 Elsevier B.V. All rights reserved.
Wang C.,Shanxi Taigang Stainless Steel Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2013
CCT curves of 08Ni3DR steel were measured by Gleeble 3800 thermal simulation testing machine, and microstructure of the steel was observed under different cooling temperature, and microstructure and mechanical properties of the 08Ni3DR steel after heat treatment was analyzed. The results show that austenitized and cooled with the speed above 8°C/s, bainite appears in the quenched microstructure. When the cooling speed is above 15°C/s, the microstructure is composed of martensite and bainitic, and the crystal line grain is uniform and fine. When 08Ni3DR steel is heated to 850°C and then rapidly cooled to 300°C, and tempered at 650°C, the crystal is uniform and fine, the microstructure is tempered sorbite and the comprehensive mechanical properties is preferable.