Abstract: The leaching solution was taken as the research object which was obtained from the new process for vanadium production by acid leaching with titanium white waste acid under the pressure without roasting. V(IV) solution in sulfuric acid system was prepared to study on the extraction performance of V(...
Abstract: For the NaVO3-H2O solution system obtained by extracting vanadium from vanadium slag by sodium method, the effects of precipitation pH value, precipitation temperature, crystallization time, ammonium addition coefficient on the crystallization of ammonium metavanadate were investigated using ammoniu...
Abstract: The relationship between crushing strength of pellets and leaching behaviors of vanadium in oxidation roasting-HCl leaching process from high-chromium vanadium-bearing titanomagnetite concentrates were investigated in this work. The results of the thermodynamic analysis of oxidizing roasting process...
Abstract: In this paper, using ammonium metavanadate as the vanadium source, hydrazine monohydrate as the reducing agent and ammonium metatungstate as the dopant, the VO2 powder doped with W from 0.0 to 2.0 at% was prepared by one-step hydrothermal method at 280 ℃, and was added to polyurethane to prepare VO2...
Abstract: In this paper, Sc3+ doped Li3V2(PO4)3/C cathode material was successfully prepared by carbothermal reduction method. The effects of Sc3+ doping amount on the structure, morphology and lithium storage properties of Li3V2(PO4)3 were systematically investigated. Although Sc3+ doping does not change the...
Abstract: In this paper, two batches of vanadium slag with different Mn content were taken as the research object. XRD and SEM-EDS were used to explore the phase composition and microstructure of vanadium slag, and to find out the phase change of calcified roasted clinker with different Mn content and its eff...
Abstract: The hot deformation behavior of TA18 Titanium alloy was investigated using the Gleeble-3500 test machine at 750 − 1050 ºC with strain rates from 0.001 s−1 to 10 s−1, and the constitutive equation including Zener-Hollomon parameter (Z parameter) and processing map was established. The results reveale...
Abstract: In order to study warm deformation behavior of the biomedical Ni-Ti alloy, compression tests were performed on a Gleeble-3800 thermal simulator. The true stress-true strain curves were obtained. The constitutive relationship and microstructures evolution during the deformation were analyzed. The pro...
Abstract: The Ti-25Ta alloy powder was successfully prepared by radio frequency plasma spheroidization, and the Ti-25Ta alloy spherical powder was subsequently formed by selective laser melting. The effect of laser power on the surface morphology, density, microstructure and mechanical properties was studied....
Abstract: A novel two-phase titanium alloy of Ti84Al11FeMo4 was designed based on d-electron theory and the phase composition as a function of temperature was analyzed. Combined with the thermodynamic calculation results, the evolution relationship between the microstructure and mechanical properties of titan...
Abstract: Low-cost Ti-4.5Al-3.5Zr-2Fe titanium alloys with different carbon content of 0, 0.1%, 0.15% and 0.3% were prepared in a water-cooled copper crucible vacuum induction levitation melting furnace. The effects of carbon microalloying on the as-cast microstructure and mechanical properties of the titaniu...
Abstract: The effect of solution and aging treatment on the microstructure of Ti60 alloy was investigated by optical microscope and scanning electron microscope. Combined with the tensile tests at room temperature and 600 ℃, it is found out the 1/2 height area of forged billet is relatively uniform and suitab...
Abstract: In this paper, cylindrical and dumbbell shaped ZTA15 titanium alloy test bars (as cast) were prepared by investment casting technology, and then treated by hot isostatic pressing (HIP). The effects of wall thickness and casting defects on the microstructure and properties of ZTA15 titanium alloy wer...
Abstract: Calcium extraction of vanadium tailings was taken as research object, the composition, phase and occurrence state of main elements of the tailings were analyzed. On the basis of combining previous studies, the comprehensive utilization of vanadium-bearing alloy and titanium-bearing furnace slag from...
Abstract: Pyrite was used as denitrification catalyst to investigate the performance in catalytic CO reduction of NO. XRF, XRD, SEM-EDS and H2-TPR are used for characterization. The results showed that the NO conversion for pyrite was 78.53% at 400 ℃ and remained constant at 100% in the temperature range of 5...
Abstract: Australia is rich in high-quality iron ore resources with high raw ore grade and low content of harmful elements, which can be directly smelted without beneficiation after mining. However, high-quality iron ore resources are not renewable. The development and utilization of lower grade iron ore reso...
Abstract: In order to separate and recover iron resources of Panzhihua pyrite residue, using Panzhihua pyrite residue as raw material, pulverized coal as carbon source, and polyvinyl alcohol (PVA) as binding agent, the influences of the content of polyvinyl alcohol, the water content, the pressure and the par...
Abstract: The oxide metallurgy technology with the low aluminum condition is carried out in marine steel and further expands the adjustment range of alloy compositions, which is beneficial to promote the effective inclusion of inducing acicular ferrite. This research has a significant potential application to...
Abstract: Transformation behavior of Cr-Mo-Ni-B ultra-high strength steel for construction machinery under continuous cooling condition was studied by means of MMS-200 thermomechanical simulator. The effect of cooling rate (0.5~40 ℃/s) on its transformation temperature and microstructure was analyzed by therm...
Abstract: In order to effectively improve the cleanliness of gear steel and product quality, it is necessary to clarify the evolution behavior of non-metallic inclusions in the smelting process of gear steel. This paper takes 20MnCr5 gear steel as the research object. Through sampling and analysis of the whol...
Abstract: Based on the process and equipment of converter, continuous casting and rolling, the experimental study on the production of HRB500E high strength anti-seismic steel rebar by microalloying with high nitrogen ferrovanadium alloy was carried out. The results show that compared with vanadium-nitrogen a...
Abstract: The effects of heating temperature, heating time, and surface treatment on the depth of decarburized layer and microstructure of cold heading 40CrMoV steel were studied, and the evolution mechanism of surface decarburization with temperature was analyzed. The results show that when the cold heading ...
Abstract: The hydrogen embrittlement sensitivity of vanadium-free and vanadium-containing (0.15%) martensite-bainite steel was studied utilizing a scanning electron microscope and transmission electron microscope. The test results show that adding vanadium will refine the prior austenite structure in martensi...
Abstract: The as-cast structure and mechanical properties of Y12Cr18Ni9 free-cutting steel were studied by means of thermodynamic calculation software FactSage, SEM and Phenom Partical X SEM-EDS. The results show that the main equilibrium phases in Y12Cr18Ni9 free-cutting steel are Liquid, MnS, δFerrite, Aust...
Abstract: In this paper, the molecular dynamics method studied the microstructural evolution, deformation mechanism, and mechanical properties of AlxCoCrFeNi high entropy alloy (HEAs) under uniaxial tension. The effects of Al content, high temperature, and high strain rate on the mechanical properties of AlxC...
Abstract: Mn18Cr18N electro-slag remelting steel was rolled in three or five passes and subject to solid solution treatment. The microstructure observation by electron back scattering diffraction (EBSD) indicates that with the increase of rolling passes, the recrystallized grains grow along the grain boundari...
Abstract: Combined with practical production experience, taking the rail products of seven racks universal production line as an example, this paper studies and deduces the pass design method of the universal zone. According to the finished product size, each pass's elongation coefficient, the local size defo...
Abstract: We here present a new approach of model construction to search for solid superionic materials in database by using decision tree and random forest algorithms. Based on a data set collected from literature and 20 features computed from lattice parameters, we constructed two decision tree models and a...
