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.

Study of Microstructure and Mechanical Properties of Extrued Spray Forming Al-8.5Fe-1.3V-1.7Si Alloy

Abstract: In this paper, the Al-8.5Fe-1.3V-1.7Si alloys were fabricated by spray forming and extrusion process. The microstructure and mechanical properties of the alloy were investigated by means of metallographic, scanning electron microscope and tensile test. The results indicate that the tensile strength of the extrued alloys can reach 353MPa, the yield strength 300MPa, elongation 19.12%, at room temperature. At 250°C, the tensile strength of the extrued alloys can reach 221MPa, the yield strength 208MPa, elongation 13.33%.

Spray-forming a metal shield layer for a SAW chip

Abstract: The method for fabricating a surface acoustic wave filter chip package comprises the steps of mounting the surface acoustic wave filter chip 13 on a substrate 12; forming a underfill 16 in a space between the substrate and the surface acoustic wave filter chip; forming a metal shield layer on an whole outer wall of the surface acoustic wave filter chip by using a spray process; and molding resins 22 on the metal shield layer. The method has advantages in that a fillet forming step (fig 1d) for improving a step-coverage is removed. By forming a metal shield layer from a conductive epoxy with the use of a spray nozzle a one-ply metal shield layer is formed without an additional metal layer for preventing oxidation of the metal layer by forming an exterior of the SAW filter chip package with the use of a top molding process, and that a structurally stable SAW filter package can be fabricated.

Aluminum lithium alloy for large-depth pressure bearing shell and preparation method of aluminum lithium alloy

Abstract: The invention discloses an aluminum lithium alloy for a large-depth pressure bearing shell and a preparation method of the aluminum lithium alloy. The alloy comprises the metal materials in percentageby mass: 1.0-1.5% of Li, 3.2-5.0% of Cu, 0.2-1.0% of Mg, 0.4-0.9% of Ag, 0.08-0.18% of Zr, 0.1-0.5% of Mn, 0.2-1.0% of Zn, less than or equal to 0.05% of Si, less than or equal to 0.8% of Fe, less than or equal to 0.1% of Ti, and the balance of Al. The preparation method includes the following steps of (1) batching; (2) preparation of an alloy ingot blank through spray forming; (3) extruding; (4)forging and upsetting; (5) reverse extruding; (6) thermal treatment; and (7) distressing aging. High-quality melt with high cleanliness and less hydrogen content is prepared through argon-shield smelting and furnace refining, the aluminum lithium alloy cast ingot with high metallurgical quality is prepared through spray deposition and electromagnetic stirring technologies, and the spray deposition technology solves the problems of non-uniform structure and macroscopic segregation of the aluminum lithium alloy cast ingot. According to the specification of the prepared aluminum lithium alloy ingot blank, the diameter is greater than phi 550 mm, the shape is regular, the density is high, and the chemical compositions are uniform and free of macroscopic segregation.

Spray forming process of thermoplastic composite material

Abstract: The invention discloses a spray forming process of a thermoplastic composite material. The spray forming process of the thermoplastic composite material comprises the following steps of (1), continuously spraying heated and pressurized resin powder to a fiber reinforcement body which moves at a uniform speed, impacting the surface of the fiber reinforcement body by the resin powder and enabling the resin powder to enter the inner part of a fiber bundle, instantly converting part of kinetic energy of the resin powder into heat energy, instantly melting and plasticizing the resin powder, impregnating the fiber reinforcement body, and obtaining a prepreg primary sample after impregnation; and (2) sequentially carrying out preheating treatment and shaping treatment on the prepreg primary sample to obtain the thermoplastic composite material after completion. According to the spray forming process of the thermoplastic composite material, the impregnating effect of the thermoplastic composite material is effectively improved.

Device for rapidly manufacturing mould through spray forming, and method for manufacturing mould

Abstract: The invention relates to a device for rapidly manufacturing a mould through spray forming, and a method for manufacturing the mould. The device comprises a cavity, an induction smelting furnace, a tundish, an atomization spraying mechanism, a whole of a ceramic receiver and a heating device, a three-dimensional oblique rotating device, a lifting device, an axial compression device, an inert gas quenching device, a plurality of operating handles and operating gloves. The method comprises the steps that spray-formed tool and mould steel on the surface of the ceramic receiver is axially compressed in the cavity, holes are completely eliminated, and the surface geometrical morphology and smooth finish of the ceramic receiver are completely replicated; when a cooling pipeline is placed in or the mould does not contain the cooling pipeline, the axially compressed tool and mould steel is subjected to direct gas quenching in the cavity into of a martensite structure, the outer profile is machined outside the cavity, and tempering is conducted; and after axial compression, the tool and mould steel can also be removed from the cavity to be annealed, the cooling pipe and the outer profile aremachined, and quenching and tempering are conducted. The holes in the mould can be reliably and thoroughly eliminated, and the completely accurate mould cavity is obtained.