Effect of hot gas atomization on spray forming of steel

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Effect of hot gas atomization on spray forming of steel

Description: Effect of hot gas atomization on spray forming of steel ...Aug 01, 2020Hot gas atomization in spray forming has been used for the first time to improve the quality of spray-formed tubular deposits. This technique reduces gas consumption and produces smaller droplets than cold gas atomization. The flight velocity and cooling rate of the ...

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    (PDF) Coupled Atomization and Spray Modelling in the Spray Effect of hot gas atomization on spray forming of steel

    The turbulence intensity is set A typical secondary atomization nozzle in spray to 15% in the inlet, and the gas flow rates at the forming consists of a number of circular inlets primary and secondary nozzles are calculated and located on a circle with the melt stream in its adjusted, so that the gas (PDF) Coupled Atomization and Spray Modelling in the Spray The turbulence intensity is set A typical secondary atomization nozzle in spray to 15% in the inlet, and the gas flow rates at the forming consists of a number of circular inlets primary and secondary nozzles are calculated and located on a circle with the melt stream in its adjusted, so that the gas (PDF) Introduction of hot gas atomization in spray forming Effect of hot gas atomization on spray forming of steel Application of hot gas atomization in spray forming process of steel tubes by a close-coupled atomizer. The goal is to extend the process window of the process for the flexible porduction.

    (PDF) PhD thesis Cooling strategies for the atomization Effect of hot gas atomization on spray forming of steel

    In the present study, a comparative investigation is done to find the influence of hot gas atomization on the spray forming of the bearing steel AISI 52100 (100Cr6) using a close-coupled atomizer.(PDF) Spray forming of high density sheets Lutz Mädler Effect of hot gas atomization on spray forming of steel Keywords spray forming, density, porosity, sheets, modeling 1 SDMA 2013 - 5th Int. Conf. on Spray Deposition and Melt Atomization 23-25 Sept. 2013 - Bremen, Germany 1 Introduction The density or porosity is one of the most important quality criteria of spray-formed materials in the as-sprayed condition, because porosity reduces mechanical Effect of hot gas atomization on spray forming of steel Advanced Materials Research Vols. 774-776 p. 25 Effect of hot gas atomization on spray forming of steel Study of the Effect of Hot Gas on Atomization Quality of Spray Forming Authors Qing Yang, Ying Dong Qu, Rui Ming Su, Bing Kun Zheng, Yu Sheng Wu Abstract In the spray forming process, the atomizing quality is not very good under the low pressure.

    Author Qing Yang, Ying Dong Qu, Rui Ming Su, Bing Kun Zheng, Yu Sheng WuPublish Year 2013Journal of Materials Processing Technology Vol 282 Effect of hot gas atomization on spray forming of steel

    Effect of hot gas atomization on spray forming of steel tubes using a close-coupled atomizer (CCA) Shohag Hussain, Chengsong Cui, Liang He, Lutz Mädler, Volker Uhlenwinkel Article 116677CO-SPRAY FORMING AND TAILORED HEAT One steel melt is poured first into a tundish, followed by gas atomization and spray deposition on a rotating tubular substrate, resulting in a ringshaped deposit (inner ring). When the first crucible is- empty, the second steel melt is poured into the tundish, gas-atomized and spray-deposited over the inner ring to form an outer ring.Cited by 1Publish Year 2020Author Shohag Hussain, Chengsong Cui, Liang He, Lutz Mädler, Lutz Mädler, Volker Uhlenwinkel, Volker Uhlenw Effect of hot gas atomization on spray forming of steel Effect of hot gas atomization on spray forming of steel Effect of hot gas atomization on spray forming of steel Hot gas atomization in spray forming has been used for the first time to improve the quality of spray-formed tubular deposits. This technique reduces gas consumption and produces smaller droplets Effect of hot gas atomization on spray forming of steel

    Cited by 1Publish Year 2020Author Shohag Hussain, Chengsong Cui, Liang He, Lutz Mädler, Lutz Mädler, Volker Uhlenwinkel, Volker Uhlenw Effect of hot gas atomization on spray forming of steel Effect of hot gas atomization on spray forming of steel Effect of hot gas atomization on spray forming of steel

    The spray-formed deposit with hot gas atomization (gas temperature about 300°C) shows lower deposit surface temperature and smaller grain size in comparison to the deposit produced under cold gas atomization condition due to smaller droplet diameter and higher cooling rate of the droplets.Combined Effect of Hot Extrusion and Heat Treatment Combined Effect of Hot Extrusion and Heat Treatment on the Effect of hot gas atomization on spray forming of steel into a spray of liquid droplets. The atomization process takes place Effect of hot gas atomization on spray forming of steel In gas atomized spray forming (GASF), the dense mass of equiaxed grains occasionally include shrinkage pores [7]. Typical microstructuresEffect of hot gas atomization on spray forming of steel Effect of hot gas atomization on spray forming of steel Aug 01, 2020Hot gas atomization in spray forming has been used for the first time to improve the quality of spray-formed tubular deposits. This technique reduces gas consumption and produces smaller droplets than cold gas atomization. The flight velocity and cooling rate of the atomized droplets increase with increasing gas temperature.

    Effects of Spray Forming and Aging Treatment on the Effect of hot gas atomization on spray forming of steel

    The microstructures and hardness of spray-formed and aged H13 steel were investigated by OM, SEM, XRD and hardness tester. Compared to the as-cast H13 steel, the microstructures of the spray-formed H13 steel is characterized by lower bainite, martensite and much more retained austenite, inducing lower hardness than the as-cast H13. The peak aging temperature for the spray-formed H13 steel Effects of Spray Forming and Aging Treatment on the Effect of hot gas atomization on spray forming of steel The microstructures and hardness of spray-formed and aged H13 steel were investigated by OM, SEM, XRD and hardness tester. Compared to the as-cast H13 steel, the microstructures of the spray-formed H13 steel is characterized by lower bainite, martensite and much more retained austenite, inducing lower hardness than the as-cast H13. The peak aging temperature for the spray-formed H13 steel Energy and material efficiency of steel powder metallurgy Effect of hot gas atomization on spray forming of steel For gas atomization and hot isostatic pressing, no energy consumption data has been published, so models were developed in order to estimate their energy intensity. Effect of hot gas atomization on spray forming of steel where V G /m M is the ow ratio of gas volume to steel mass, Effect of hot gas atomization on spray forming of steel A. Leatham, Spray forming alloys, products and markets, Met. Powder Rep. 54 (5) (1999) 2837.

    Experiments on atomization and spray characteristics of an Effect of hot gas atomization on spray forming of steel

    The atomization and the spray characteristics from an effervescent/aerated strut injector were studied experimentally using water as the liquid and nitrogen gas as the secondary fluid. The spray fl Effect of hot gas atomization on spray forming of steel High speed steel produced by spray forming, Advances in Effect of hot gas atomization on spray forming of steel May 02, 2016High speed steel produced by spray forming High speed steel produced by spray forming Zhao, Shun-Li; Fan, Jun-Fei; Zhang, Jie-Yu; Chou, Kuo-Chih; Le, Hai-Rong 2016-05-02 00:00:00 Adv. Manuf. (2016) 4:115122 DOI 10.1007/s40436-016-0137-6 1,2 2 1 1 Shun-Li Zhao Jun-Fei Fan Jie-Yu Zhang Kuo-Chih Chou Hai-Rong Le Received 6 January 2015 / Accepted 19 High speed steel produced by spray formingThe solidification process during spray forming can be divided into two stages gas atomization (rapid cooling) and droplet consolidation (relatively slow cooling) . The vanadium is a strong carbide-forming element and the eutectic reaction L + MC will happen firstly during the solidification process [ 18 ,

    High speed steel produced by spray forming

    The solidification process during spray forming can be divided into two stages gas atomization (rapid cooling) and droplet consolidation (relatively slow cooling). The vanadium is a strong carbide-forming element and the eutectic reaction L + MC will happen Hybrid Gas Atomization for Powder ProductionHybrid Gas Atomization for Powder Production Udo Fritsching and Volker Uhlenwinkel University of Bremen Germany 1. Introduction Atomization of a molten liquid melt is a versatile method for powder production. Main operational parameters and physical conditions for a suitable atomization process for different applications in powder production are:Hybrid Gas Atomization for Powder ProductionPowder production by gas atomization of such viscous melts is a difficult task because of the rapid cooling of the generated ligaments during melt fragmentation that may cause fibre formation in stead of a particulate product.

    Laser Doppler anemometry - ScienceDirect

    Effect of hot gas atomization on spray forming of steel tubes using a close-coupled atomizer (CCA) 2020, Journal of Materials Processing Technology Download PDF View detailsLutz Mädler's research works Universität Bremen, Bremen Effect of hot gas atomization on spray forming of steel Hot gas atomization in spray forming has been used for the first time to improve the quality of spray-formed tubular deposits. This technique reduces gas consumption and produces smaller droplets Effect of hot gas atomization on spray forming of steel Modeling of Porosity during Spray Forming Part I. II of this article, the effects of atomization gas chemistry and alloy compositions are addressed. II. FORMULATION A. Porosity Model As briey described previously, three major mechanisms of porosity formation during spray forming have been pro-posed, that is, gas porosity, interstitial porosity, and solid-ication shrinkage.

    Modeling of Porosity during Spray Forming Part I.

    II of this article, the effects of atomization gas chemistry and alloy compositions are addressed. II. FORMULATION A. Porosity Model As briey described previously, three major mechanisms of porosity formation during spray forming have been pro-posed, that is, gas porosity, interstitial porosity, and solid-ication shrinkage.Modeling of Porosity during Spray Forming Part I. II of this article, the effects of atomization gas chemistry and alloy compositions are addressed. II. FORMULATION A. Porosity Model As briey described previously, three major mechanisms of porosity formation during spray forming have been pro-posed, that is, gas porosity, interstitial porosity, and solid-ication shrinkage.Simulation of Spray Cooling on Hot Steel Slabs in Effect of hot gas atomization on spray forming of steel Heat transfer coefficient (HTC) on slab surface is validated against a hot-plate benchmark experiment and shows good agreement. The significance of spray standoff distance and spray direction on heat transfer is also investigated. The results indicate the existence of the critical standoff distance beyond which the cooling effect becomes Effect of hot gas atomization on spray forming of steel

    Some results are removed in response to a notice of local law requirement. For more information, please see here.Some results are removed in response to a notice of local law requirement. For more information, please see here.Combined Effect of Hot Extrusion and Heat Treatment

    Combined Effect of Hot Extrusion and Heat Treatment on the Effect of hot gas atomization on spray forming of steel into a spray of liquid droplets. The atomization process takes place Effect of hot gas atomization on spray forming of steel In gas atomized spray forming (GASF), the dense mass of equiaxed grains occasionally include shrinkage pores [7]. Typical microstructuresSpray Forming of Aluminum-Alloy Products Part One Effect of hot gas atomization on spray forming of steel The disadvantages of spray forming include as-sprayed porosity that requires closing by hot isostatic pressing or other downstream processes, and losses because not all droplets created by atomization end up in the spray- formed billet.

    Spray forming - Oxford University

    Spray forming, also called spray casting or spray deposition, is the inert gas atomization of a liquid metal stream into variously sized droplets (10-500 microns) that are then propelled away from the region of atomization by the fast flowing atomizing gas.Spray forming Science and technologySpray forming Science and technology S N OJHA Department of Metallurgical Engineering, Banaras Hindu University, Varanasi 221005, India Abstract. Spray forming involves sequential gas atomization of a melt into a spray of fine droplets and their deposition on a substrate to build up a high-density preform. The rapidStudy of the Effect of Hot Gas on Atomization Quality of Effect of hot gas atomization on spray forming of steel In the spray forming process, the atomizing quality is not very good under the low pressure. This article attempts to improve the quality of atomization through heating the gas. A mathematical model is built and calculated according to the existing knowledge, and then the influence of airflow temperature in the spray forming is theoretical calculated and analyzed.

    Study on flow fields of regional control constrained spray Effect of hot gas atomization on spray forming of steel

    Then, the billets will be extruded continuously under hot condition. Effect of hot gas atomization on spray forming of steel and I. Anderson, A numerical investigation of gas flow effects on high-pressure gas atomization due to melt tip geometry variation Effect of hot gas atomization on spray forming of steel Simulation of gas flow field in Laval nozzle and straight nozzle for powder metallurgy and spray forming, J. Iron Steel Res Effect of hot gas atomization on spray forming of steel Study on the atomization zones of the nozzle in the Effect of hot gas atomization on spray forming of steel It can divide the atomization effect in the direction of the nozzle axial injection into the jet area and the non-jet area by using the second crushing theory. On this basis, according to the feed liquid atomization particles discrete degree index ofThe properties and benefits of spray formed steelsOct 20, 2014H13 steel cast and annealed As spray formed SFM Hot working steels example H13 H13 steels are hot working steels with high hardenability and both thermal and wear resistance Typical applications are pressure die casting tools, extrusion tools, forging dies, hot

    The properties and benefits of spray formed steels

    Oct 20, 2014H13 steel cast and annealed As spray formed SFM Hot working steels example H13 H13 steels are hot working steels with high hardenability and both thermal and wear resistance Typical applications are pressure die casting tools, extrusion tools, forging dies, hot US5472177A - Molten metal spray forming apparatus - A regulating gas flow valve is operatively connected to an oscillating molten metal spray forming ring converter through which a molten metal stream passes. The passing metal stream is impacted by gas jets from the converter which breaks up the metal stream into a spray pattern of small molten metal droplets. The valve regulates the flow of gas into the converter as a function of the converter Effect of hot gas atomization on spray forming of steel US6565010B2 - Hot gas atomization - Google PatentsA method for atomizing a fluid wherein a gas is heated with the heating facilitating the acceleration of the gas to a high velocity. The accelerated gas contacts the fluid transferring shear, pressure and inertial forces and heat to the fluid effecting efficient atomization of the fluid.

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