The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Eric Becker - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation of the thixoforging of tubes of low-carbon steel
Journal of Materials Processing Technology, 2018Co-Authors: Eric Becker, Régis Bigot, Sophie Rivoirard, Pierre FaverolleAbstract:This article presents the outcomes of using thixo-extrusion (backward and forward) to produce tubes in low-carbon steel, grade SAE1006 (C05). According to the literature data, the semisolid state of this steel, required for thixoforging, is very difficult to obtain and has never been studied for this type of shaping. The experimental tests involve using an inductive heating and a flashless forging process. This work shows the route and possibility to obtain a usable semisolid by inductive heating for thixoforging of this steel grade. It shows by simulation the validation steps before the shaping and the forming constraints. A geometrical analysis of the parts revealed the good dimensional performance of thixoforging processes with high repeatability and a good microstructure. Such thixoforged tubes extend the dimensional limits of the tube wall thickness, as compared to the case of conventional forging in one step and in the framework of a typical Industrial Installation. These results could be integrated into a knowledge management system of thixoforging to identify new possibility of components.
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Some Approaches on Industrial Installation of Steel Thixoforged Processes
Solid State Phenomena, 2012Co-Authors: Régis Bigot, Eric Becker, Laurent LangloisAbstract:Based on several years of research, this paper presents some approaches on Industrial Installation on thixoforging steel with an important potential of an innovative technology. The possibility of Thixoforging Industrialization makes it possible to consider new steel components production. From billet to final part with complex shape obtained in one step, several “keys” are developed as heating system, transfer system, part and die design.
Pierre Faverolle - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation of the thixoforging of tubes of low-carbon steel
Journal of Materials Processing Technology, 2018Co-Authors: Eric Becker, Régis Bigot, Sophie Rivoirard, Pierre FaverolleAbstract:This article presents the outcomes of using thixo-extrusion (backward and forward) to produce tubes in low-carbon steel, grade SAE1006 (C05). According to the literature data, the semisolid state of this steel, required for thixoforging, is very difficult to obtain and has never been studied for this type of shaping. The experimental tests involve using an inductive heating and a flashless forging process. This work shows the route and possibility to obtain a usable semisolid by inductive heating for thixoforging of this steel grade. It shows by simulation the validation steps before the shaping and the forming constraints. A geometrical analysis of the parts revealed the good dimensional performance of thixoforging processes with high repeatability and a good microstructure. Such thixoforged tubes extend the dimensional limits of the tube wall thickness, as compared to the case of conventional forging in one step and in the framework of a typical Industrial Installation. These results could be integrated into a knowledge management system of thixoforging to identify new possibility of components.
Régis Bigot - One of the best experts on this subject based on the ideXlab platform.
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Experimental investigation of the thixoforging of tubes of low-carbon steel
Journal of Materials Processing Technology, 2018Co-Authors: Eric Becker, Régis Bigot, Sophie Rivoirard, Pierre FaverolleAbstract:This article presents the outcomes of using thixo-extrusion (backward and forward) to produce tubes in low-carbon steel, grade SAE1006 (C05). According to the literature data, the semisolid state of this steel, required for thixoforging, is very difficult to obtain and has never been studied for this type of shaping. The experimental tests involve using an inductive heating and a flashless forging process. This work shows the route and possibility to obtain a usable semisolid by inductive heating for thixoforging of this steel grade. It shows by simulation the validation steps before the shaping and the forming constraints. A geometrical analysis of the parts revealed the good dimensional performance of thixoforging processes with high repeatability and a good microstructure. Such thixoforged tubes extend the dimensional limits of the tube wall thickness, as compared to the case of conventional forging in one step and in the framework of a typical Industrial Installation. These results could be integrated into a knowledge management system of thixoforging to identify new possibility of components.
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Some Approaches on Industrial Installation of Steel Thixoforged Processes
Solid State Phenomena, 2012Co-Authors: Régis Bigot, Eric Becker, Laurent LangloisAbstract:Based on several years of research, this paper presents some approaches on Industrial Installation on thixoforging steel with an important potential of an innovative technology. The possibility of Thixoforging Industrialization makes it possible to consider new steel components production. From billet to final part with complex shape obtained in one step, several “keys” are developed as heating system, transfer system, part and die design.
Marek Wasilewski - One of the best experts on this subject based on the ideXlab platform.
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optimization of the geometry of cyclone separators used in clinker burning process a case study
Powder Technology, 2017Co-Authors: Marek Wasilewski, Lakhbir Singh BrarAbstract:Abstract This study presents the possibilities for improving the process of clinker burning by optimizing the geometry of first-stage cyclones that form a part of a cyclone suspension preheater. Due to the high energy consumption and scale of the process involved in cement production, the aim is to improve the efficiency of the system. Since the exploitation data collected from real Industrial Installations frequently indicate significant discrepancies against the results obtained from experimental models, a case study of a particular Industrial Installation is, therefore, presented. Three highly efficient design models are proposed based on design guidelines to enhance the cyclone performance. In addition, a new method to determine the basic characteristic dimension D of the first-stage cyclone separators used for clinker burning is also proposed. The multiphase flow inside the cyclones was analyzed using computational fluid dynamics (CFD) analysis. As a closure model to the Reynolds-averaged Navier–Stokes (RANS) equation, the Reynolds stress model (RSM) was used, as this solves the transport equations for Reynolds stresses as well as the dissipation rate. For the discrete phase, one-way coupling was used, and the numerically predicted results were found to be in close agreement with the existing Industrial Installations. The results conclusively indicate that the proposed design guidelines, when applied to existing first-stage cyclones, result in better collection efficiency with a more than 43% reduction in the power consumption (with the third cyclone variant), which is highly significant.
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analysis of the effects of temperature and the share of solid and gas phases on the process of separation in a cyclone suspension preheater
Separation and Purification Technology, 2016Co-Authors: Marek WasilewskiAbstract:Abstract Most scientific papers discussing cyclone separators do not consider the effects of temperature or the share of the solid and gas phases on the efficiency of such devices. This article analyses the effect of these factors on the efficiency of solid particle separation, based on a cyclone separator that constitutes part of a suspension preheater. The operating conditions for this device allowed for a wide range of temperatures to be taken into account. The main research procedure was preceded by exploitation research conducted at an Industrial Installation. This enabled the correct reconstruction of the cyclones actual operating conditions. The multiphase flow inside the cyclones was analysed with computational fluid dynamics (CFD). Reynolds-averaged Navier–Stokes equations with the Reynolds stress turbulence model (RSM) were used in the analysis. The methods used in this paper for analysing the phenomena occurring inside the device allow for the conclusion that both the temperature and the concentration of solid particles have a significant effect on the effectiveness of a cyclone separator. The presented analysis may help to optimise the cyclones used in cyclone suspension preheaters, as well as traditional devices used solely for separation processes.
A. Valverde - One of the best experts on this subject based on the ideXlab platform.
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Solar photodegradation of antipyrine in a synthetic WWTP effluent in a semi-Industrial Installation
Solar Energy Materials and Solar Cells, 2014Co-Authors: A. Durán, José M Monteagudo, I. Sanmartín, A. ValverdeAbstract:Abstract The aim of this work was to study the continuous mineralization of antipyrine present in a synthetic municipal wastewater effluent (SE) in a semi-Industrial UV/solar compound parabolic collector (CPC) plant using a homogeneous photo-Fenton oxidation assisted with ferrioxalate. Under the selected continuous operating conditions ([H2O2]=750 ppm, [Fe]=12 ppm, pH=2.7, and [(COOH)2·2H2O]=66.2 ppm, flowrate=1200 L/h, 77% of TOC is removed when treating an aqueous synthetic effluent containing 50 ppm of antipyrine. The use of artificial UV lamps together with solar radiation increases mineralization up to 88%. Determination of the hydrogen peroxide consumed and remaining in the water revealed that 4.7 mol of H2O2 were consumed per each mol of total organic carbon removed from solution. The operational costs due to the consumption of reagents and catalysts were calculated from the optimal conditions. The results showed that the ferrioxalate-assisted solar photo-Fenton process was economically feasible with no electric consumption due to the use of photovoltaic panels. Under optimal conditions, a total cost of 2.78 cent €/g TOC removed (1.56 €/m3) was calculated.