Abstract: M-phase vanadium dioxide (VO2) is a major thermally induced phase change material with a phase change temperature of 68 ℃. Due to obvious changes in physical and chemical properties before and after the phase change, M-phase VO2 can be widely used in the fields of phase change energy saving and sens...
Abstract: Based on non-isothermal thermogravimetric analysis, the influences of Na2CO3 addition and heating rate on oxidation of vanadium removal slag of titanium tetrachloride (vanadium-containing tailings) were studied. The Kissinger-Akahira-Sunose (KAS) method was used to calculate the activation energy an...
Abstract: Regarding the problem that low acidolysis rate occurs frequently at the beginning of the experiment in low-grade titanium slag, an investigation was proposed to elaborate the relationship among the phase composition, acidolysis temperature curve, and standard heat of reaction for the chemical reacti...
Abstract: Calcification roasting-acid immersion is a very promising clean process for vanadium extraction, but the resultant acidic vanadium solution contains a higher content of manganese, which seriously affects the quality and application of vanadium products. Thus the removal of manganese from the acidic ...
Abstract: Vanadium slag and sodium peroxide (Na2O2) were mixed, briquetted, roasted, and leached to rich vanadium into V2O5. The effects of roasting temperature, briquetting pressure, roasting time, Na2O2 content, and leaching temperature on the vanadium leaching rate were studied. The results showed that the...
Abstract: The sources of impurity Al in titanium sponge produced by the Kroll process were analyzed. The impurity Al is mainly derived from titanium tetrachloride and magnesium. Based on the source analysis of Al in titanium tetrachloride, water vapor was introduced for Al removal from titanium tetrachloride ...
Abstract: The in-situ formed (Ti5Si3 + TiBw)/TC11 composites with network structure were prepared by powder metallurgy. The metallographic structure, microstructure, mechanical properties and fracture surface of (Ti5Si3 + TiBw)/TC11 were analyzed. The results show that TiBw and partial Ti5Si3 distribute aroun...
Abstract: The optical microscope (OM) was employed to investigate the influence of heat treatment on microstructure evolution of ZTC4 titanium alloy, and the relationship between microstructure and mechanical properties was discussed. The results showed that the ZTC4 titanium alloy casting was composed of mar...
Abstract: The research on welding process and weldability of TC4 titanium alloy has been widely concerned at home and abroad. Therefore, this paper mainly reviewed the current research progress of the effect of laser welding process on the geometrical dimensions, microstructure and mechanical properties of th...
Abstract: Industrial V-Mo/Ti denitration catalyst was modified by phosphorus (P) via impregnation method to enhance the catalytic performances. The catalyst was characterized by XRD, N2 adsorption and desorption, XPS, H2-TPR and UV-vis. The denitration activities of the catalyst were tested on a fixed-bed mic...
Abstract: The characteristics of the photocatalysts can be prepared using Ti-bearing blast furnace slag containing TiO2 to realize Ti-bearing blast furnace slag′s high added value and reasonable comprehensive utilization. Photocatalytic material derived from vanadium and nitrogen co-doped Ti-bearing blast fur...
Abstract: Deform software were employed to simulate hydraulic press and hammer press forging processes of TA15 titanium alloy, and two kinds of forging equipment were used to produce TA15 titanium alloy forgings. The results show that when hydraulic module of deform software is used to deform TA15 titanium al...
Abstract: This paper used the sol-gel method to prepare Fe3+ doped GO-TiO2 films with different proportions on glass substrates. The samples were characterized by X-ray diffraction (XRD) and ultraviolet-visible spectrometer (UV-Vis). The photocatalytic degradation of TCM was irradiated under a UV lamp with a ...
Abstract: Steelmaking slags containing large amounts of Ca silicate is a potentially alkaline waste that can be used to capture CO2 to synthesize high-quality CaCO3. Here, effect of ultrasonic on leaching efficiency and selective leaching rate of Ca in steelmaking slags was studied in acetic acid solution. Ex...
Abstract: Corundum slag is a solid waste produced in smelting 50 or 80 vanadium iron by thermite process. In order to improve the utilization value of corundum slag, the primary raw materials in this investigation were corundum slag, ferrosilicate, limestone, calcium carbide and sodium carbonate, respectively...
Abstract: The mix proportion of high titanium heavy slag concrete (HTHS) and normal concrete was designed. Four groups of concrete cubic and prism specimens were made and tested. Using the PFC discrete element software, the meso-structure mechanical parameters of HTHS and normal concrete specimen were calibra...
Abstract: Vanadium-titanium magnetite has its unique characteristics like containing many valuable elements, complex phase structure and close intergrowth of iron and titanium, as well as the difficulty of full comprehensive utilization. In this paper, the phase change of vanadium-titanium magnetite reacted w...
Abstract: In this investigation, the low-alloy steel wire applied in additive manufacturing was made by clean steelmaking, hot rolling and drawing; subsequently, laser wire-feed additive manufacturing was carried out with this steel wire. The mechanical properties of the 3D printed parts are the yield strengt...
Abstract: Based on the classical model of collision aggregation of inclusions, the growth mode of exponential increase of inclusions is used to establish the numerical model of reaction of aluminum and oxygen, collision and aggregation of inclusions, remove of inclusions, for the purpose of predicating the ma...
Abstract: Based on the principle that electromagnetic force affects the distribution of non-metallic inclusions and the velocity of particles in molten metal, the effect of electromagnetic stirring in mold on the removal of non-metallic inclusions in billet was studied. The inclusion separation and removal ex...
Abstract: The development of vibration introduced into the metal solidification process was reviewed and the vibration methods, application fields, metallurgical effects, and advantages/disadvantages of mechanical vibration technology, vibration excitation nucleation technology, ultrasonic vibration technolog...
Abstract: The dynamic mechanical properties of austenitic stainless steel 06Cr19Ni10 were studied by a high temperature split-Hopkinson pressure bar (SHPB) at temperatures of 25–300 ℃ and strain rates of 1000–3000 s−1. The austenitic stainless steel 06Cr19Ni10 shows strain rate strengthening effect in the ran...
Abstract: 1725/WC composite coatings were prepared on the surface of cast iron by laser cladding. The effects of process parameters including laser power, scanning speed and powder feed rate on dilution ratio and hardness of the cladding coating were studied through orthogonal experiments. The results showed ...
Abstract: In this work, the influence of Ti treatment on inclusions in steel and the formation conditions and evolution process of Ti oxide inclusions were studied by a combination of simulation calculation and experiment. The results show that at 1 600 ℃, when the content of [O] in steel is greater than 22×1...
Abstract: In order to investigate the effect of SO42− on the corrosion damage of 304 stainless steel in a solution containing 0.7 mol/L Cl−, acoustic emission technology and morphology observation technology were used to test the acoustic signal generated during the corrosion process and the surface morpholog...
Abstract: The influence of rare earth modifier on nonmetallic inclusion morphology and size distribution of 1500 MPa grade hot stamping steel were investigated by optical microscope and scanning electron microscope. And the microstructure and plastic property of resulted steel at room temperature were compare...
Abstract: In this paper, the microstructure, corrosion resistance and wear resistance of Fe-Si-Mn-C-Ti high-strength building steel with different titanium content were tested and analyzed. The results show that the addition of alloy element titanium is helpful to refine the internal structure and improve the...
Abstract: The work roll bending force of the last stand of the four stands 6-Hi HC tandem cold rolling mill is usually in saturation state when the brightwork roll is used in the last stand. This production phenomenon leads to the lack of the ability to control the strip shape, and then the shape defects are ...
Abstract: The surface crack area of SAE1144 free cutting steel during cold drawing from 18 mm round bar to 15 mm octagonal bar was studied by means of optical microscope, sample electrolysis, SEM+EDS and ImageJ software. The results show that there exist large granular MnS inclusions, elongated strip cluster ...
