Topic
Spray forming
About: Spray forming is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 12869 citations. The topic is also known as: spray casting & spray deposition.
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Patent•
19 Feb 2014
TL;DR: In this paper, a multi-metal liquid spray deposition additive manufacturing method is described, which belongs to additive manufacturing techniques in the field of machine manufacturing, and the method includes: establishing a computer 3D solid model of parts, and z-directionally layering the established model to obtain a scan path of a current layer; melting various metals to be deposited into liquids with a heating device; using nozzles to perform metal liquid spray forming along the scan path, according to the information of the current layer.
Abstract: The invention discloses a multi-metal liquid spray deposition additive manufacturing method and belongs to additive manufacturing techniques in the field of machine manufacturing The method includes: establishing a computer 3D solid model of parts, and z-directionally layering the established model to obtain a scan path of a current layer; melting various metals to be deposited into liquids with a heating device; using nozzles to perform metal liquid spray forming along the scan path of the current layer according to the information of the current layer; after spraying of one layer, moving to another layer height The multi-nozzle multi-metal spray deposition fast-forming method is adopted, the metal parts manufactured with additive manufactured by the method have good internal structure and good operating performance, production cycle is short, and production efficiency is high
6 citations
TL;DR: In this article, the billets of M3 high speed steel with or without niobium addition were prepared via spray forming and forging, and the corresponding microstructures, properties were characterized and analysed.
Abstract: The billets of M3 high speed steel (HSS) with or without niobium addition were prepared via spray forming and forging, and the corresponding microstructures, properties were characterized and analysed. Finer and uniformly-distributed grains without macrosegregation appear in the as-deposited high speed steel that are different to the as-cast high speed steel, and the primary austenite grain size can be decreased with 2% niobium addition. Niobium appears in primary MC-type carbides to form Nb6C5 in MN2 high speed steel, whereas it contributes less to the creation of eutectic M6C-type carbides. With same treatments to forged MN2 high speed steel and M3 high speed steel, it is found that the peak hardness of these two steels are almost the same, but the temper-softening resistance of the former is better. With higher high-temperature hardness of the forged MN2 high speed steel, its temper softening above 600 °C tends to slow down, which is related to the precipitation of the secondary carbides after tempering. A satisfactory solid solubility of Vanadium and Molybdenum can be obtained by Nb substitution, precipitation strengthening induced by larger numbers of nano-scaled MC and M2C secondary carbides accounts for the primary role of determining higher hardness of MN2 high speed steel. The results of the wear tests show that the abrasive and adhesive wear resistance of MN2 high speed steel can be improved by the grain refinement, existence of harder niobium-containing MC carbides, as well as solute strengthening by more solute atoms. The oxidational wear behavior of MN2 high speed steel can be markedly influenced by the presence of the high hardness and stabilization of primary niobium-containing MC-type carbides embedded in the matrix tested at 500 °C or increased loads. The primary MC carbides with much finer sizes and uniform distribution induced by the combined effects of niobium addition and atomization/deposition would be greatly responsible for the good friction performance of the forged MN2 high speed steel.
6 citations
Patent•
02 Nov 2011
TL;DR: In this article, a high-silicon aluminum alloy was optimized based on a Fe-rich phase and a preparation method thereof, and the method was used for manufacturing a novel high-strength heat-resistant high silicon aluminum alloy used in a cylinder liner for an automobile engine.
Abstract: The invention provides a high-silicon aluminum alloy optimized based on a Fe-rich phase and a preparation method thereof, and the method is used for manufacturing a novel high-strength heat-resistant high-silicon aluminum alloy used in a cylinder liner for an automobile engine. The high-silicon aluminum alloy comprises the following components by weight percentage: 22-27wt% of Si, 4-6wt% of Fe, 3-4wt% of Cu, 0.5-2.5wt% of Cr, 0-2wt% of Mn and the balance of Al. The invention further provides a preparation method of the high-silicon aluminum alloy. In the method, by utilizing a spray forming rapid solidification technology, the alloy elements are added to a graphite crucible based on a given ratio for melting, and then the obtained melt is directly atomized and deposited in the presence of nitrogen to form a bulky material. The preparation method has the beneficial effects that by properly controlling the mass fraction ratio of Cr/Fe or (Cr+Mn)/Fe and utilizing a subsequent hot extrusion or hot rolling process, a large number of fine and uniformly-distributed alpha-Al(Fe,TM)Si(TM=Cr or (Cr+Mn)) phase particles are formed in the final-state alloy instead of the flat-elongated Fe-rich phase in the traditional cast alloy so as to greatly improve room (high) temperature performance and heat stability and enhance thermal deformability and machinability.
6 citations
Patent•
18 Jun 2013TL;DR: In this article, an electrical inductor is constructed from an electrically conductive material by a layer-by-layer production process. The inductor geometry is predetermined as a record computer supported by a numerical method.
Abstract: The method comprises forming an electrical inductor from an electrically conductive material by a layer-by-layer production process. The layer-by-layer production process includes a selective laser melting, a spray forming and/or a laser wire spraying. The method further comprises placing a supporting body on a bottom surface of the inductor, and removing the support body after completion of an inductor geometry. The support body has a support surface having a geometry to be formed corresponds to an effective area at the inductor, and is provided or produced by selective laser melting. The method comprises forming an electrical inductor from an electrically conductive material by a layer-by-layer production process. The layer-by-layer production process includes a selective laser melting, a spray forming and/or a laser wire spraying. The method further comprises placing a supporting body on a bottom surface of the inductor, and removing the support body after completion of an inductor geometry. The support body has a support surface whose geometry to be formed corresponds to an effective area at the inductor, and is provided or produced by selective laser melting, spray forming and/or laser wire spraying process. The electrically conductive material includes a conductive raw material, a powder or a wire, a metallic or non-metallic raw material. The supporting body: is formed from a material having a lower melting point than the electrically conductive material and including a metal, an ice or a wax; includes a soluble material formed of a salt; and is melted or dissolved by the inductor. The inductor geometry is predetermined as a record computer supported by a numerical method. The method is computerized based on a data. A wall thickness of the inductor is varied based on load.
6 citations
TL;DR: In this article, the microstructure evolution of gamma prime phase under different conditions was systematically analyzed, and the reasonable heat treatment regime of FGH100L alloy was determined based on microstructural characterization of γ′ phase.
6 citations