Abstract: In this study, polyvinyl pyrrolidone (PVP) is used to optimize the core-shell V@C precursor structure, and the precursor is heat-treated to obtain vanadium nitride (VN) up to the National Standard VN16 grade of China. The addition of PVP promotes both the uniform dispersion of the carbon powders in ...
Abstract: Based on the limited selectivity exhibited by current direct acid leaching and alkaline leaching processes for deactivated sulfuric acid catalysts, resulting in costly subsequent separation and challenging medium reuse, a new two-step process for selective extraction of vanadium was adopted. Using t...
Abstract: In this paper, the process conditions and reaction process of using CH4 instead of traditional carbon thermal reduction to prepare VN is explored by combining thermodynamic calculation and experimental process exploration. The results showed that the VN products with nitrogen and carbon contents of ...
Abstract: Based on the physical parameters of high titanium slag and chlorine gas, the initial fluidization velocity of fluidized chlorination of high titanium slag was calculated by using the classical initial fluidization velocity formula. And the mathematical model of gas-solid two-phase flow of fluidized ...
Abstract: Electrolytic titanium powder was utilized as the raw material for fabricating porous titanium through press-sintering technique. The forming and sintering characteristics were investigated. Then the mechanical properties, pore structure, pore size distribution and permeability of the prepared porous...
Abstract: The surface energy and acid/base constants of three kinds of titanium dioxide (TiO2) were measured by inverse gas chromatography (IGC) to investigate the effect of organic treatment on the surface properties of TiO2. The non-polar surface energy of the samples were calculated by using different mole...
Abstract: Renewable energy-based water electrolysis is the main method of producing “green hydrogen”, but it still faces difficulties in large-scale application due to high power consumption and the resulting high cost of electricity. The way to reduce power consumption lies in the development of high-perform...
Abstract: TC4 forged titanium plates with a thickness of 14 mm were multi-layer and multi-pass butt welded by non-melting tungsten inert gas welding (TIG), and the metallographic structure, crystal orientation and mechanical properties of the joints were investigated. The results show that the weld seams of T...
Abstract: The thin-walled Gr.1 pure titanium straight seam welded pipe was welded by laser, and the samples obtained from the experiment were analyzed for macroscopic morphology, microstructure and mechanical properties. The results show that the weld width of longitudinally welded thin-walled pipe is relativ...
Abstract: The prolonged exposure of TMCs to high temperatures results in severe interfacial reactions between the matrix and the fiber, leading to a degradation in the mechanical properties of the composites. In this study, SiCf/TC25G composites were prepared using a magnetron sputtering precursor wire method...
Abstract: To investigate the effect of prestrain on the mechanical properties of TA2, room temperature tensile tests were conducted on the TA2 original material and specimens with the prestrains of 10%, 20%, and 30%. Based on the influence of prestrain on the mechanical properties of TA2, prestrain variables ...
Abstract: Ti-45Al-8Nb-xHf (x=0.5, 1.0, 1.5, 2) alloys were prepared by argon-protected vacuum induction melting process, and the microstructure, compressive properties and antioxidant properties of the alloys were investigated by using optical microscope (OM), scanning electron microscope (SEM), energy spectr...
Abstract: Recently, due to the increasing application of selective catalytic reduction (SCR) technology, a large number of spent SCR denitrification catalysts were inevitably produced. In order to save the resources and protect the environment, much attention should be attracted on their proper disposal. Spen...
Abstract: The comprehensive utilization of fly ash is a solid waste industry with high technical content and application potential, which integrates environmental protection and resource recycling. Ferrosilicon alloy was prepared by carbothermal reduction of fly ash under laboratory conditions and alumina was...
Abstract: In order to find out the ore properties of a low-grade refractory vanadium-titanium magnetite ore and the factors affecting the beneficiation index, carried out detailed process mineralogy research. The research shows that the ore is a low-grade vanadium-titanium magnetite ore of gabbro type. The gr...
Abstract: To optimize the recycling strategy of steel slag and enhance the economic and social benefits of steel companies, the study first analyzed the content of titanium and phosphorus elements in steel slag and conducted sintering pot tests based on different steel slag ratios. In the vanadium-titanium ma...
Abstract: The theoretical combustion temperature in front of the tuyere is one of the important parameters for evaluating the thermal state of the blast furnace hearth. On the basis of the traditional theoretical combustion temperature calculation model, the influence of ash content, unburned coal powder, and...
Abstract: In order to improve the quality of Xianggang Q345R thick slab casting billet, a solidification heat transfer model was established and was verified and corrected by nail shooting experiment. Through numerical simulation, the existing production process was evaluated, and the influence of casting spe...
Abstract: CaO-Al2O3-V2O5 slag system is a basic metallurgical slag system for denitrification of liquid steel. The lack of thermodynamic information, such as the phase equilibrium relationship, limits the research and development of related slag systems. In this paper, the phase equilibrium relationship of Ca...
Abstract: The sizes and microstructures of MnS at different positions of the heavy rail steel bloom were measured by electro-chemical etching and Aspex scanning, and the effect of solidification structure on MnS was studied. The results show that when the solidification structure transforms from mixed-crystal...
Abstract: The transformation of different phases, the precipitation of inclusions and carbides in the Cr12MoV cold work die steel were calculated using Factsage thermodynamic software. The inclusions and carbides of the mold casting billets were analyzed using OM and SEM. It is shown that Cr12MoV steel is dom...
Abstract: On the basis of 7Mn medium manganese steel, different contents of V element were added. Through cold rolling and annealing treatment, the influence of 0.1%~0.3% V addition on the microstructure and mechanical properties of the steel was preliminarily explored. The experimental results show that when...
Abstract: In order to reveal the influence of final cooling temperature on microstructure and mechanical properties of Ti-microalloyed automobile 510L beam steel, the hot rolling and laminar cooling (LC) experiment was conducted on 0.11C-1.20Mn-0.055Ti beam steel. The experimental results showed that with the...
Abstract: Using cobalt nitrate (Co(NO3)2·6H2O), iron nitrate (Fe(NO3)3·9H2O), nickel nitrate (Ni(NO3)2·6H2O), manganese nitrate (Mn(NO3)2·4H2O), copper nitrate (Cu(NO3)2·3H2O) as raw materials and glycine as fuel, Co0.25Ni0.25Cu0.25Mn0.25Fe2O4 was prepared by solution combustion synthesis. The preparation and...
Abstract: In this paper, the high-temperature low-cycle fatigue characteristics of three types of materials: 316L base metal, welded material, and welded joints were systematically studied. By introducing a fatigue life reduction coefficient into the traditional life prediction model, the low-cycle fatigue li...
Abstract: The CCT curves of 50W600 and 50W600-Ti were measured by thermal simulator. The phase transformation of the two test steels under continuous cooling had been studied and precipitation behavior in titanium-containing steels was also observed. The results show that the phase transformation temperature ...
Abstract: In this paper the revision reasons and process evolution of new standard GB/T 2965-2023 had been briefed. And interpretation had been made on the following points such as terms and definition, product category, dimension and tolerance, heat treatment, mechanical properties, sampling and test result ...
