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.

Forming apparatus and method for alloy material using osprey forming

Abstract: PURPOSE: An apparatus and method for forming an alloy material using a spray forming method are provided to efficiently prevent the oxidation of metal and to form the alloy material in which at least two substances are uniformly mixed. CONSTITUTION: An apparatus for forming an alloy material using a spray forming method includes a molten metal generating part (10), a spray chamber (50), a gas jetting part, and a substrate (51). The molten generating part has a melting chamber and a heating unit. The melting chamber has a closed inner space, and the heating unit melts an ingot charged into the melting chamber. The spray chamber is installed at the lower side of the melting chamber. The gas jetting part jets inert gas to molten metal, which is discharged from the melting chamber and falls into the spray chamber, and then granulates the molten metal into droplets. The droplets falls and are laminated on the substrate.

Sprühkompaktieren von Kupferlegierungen im industriellen Massstab

Abstract: Following the introduction of the spray forming method for processing aluminium alloys, the method is now also used in the manufacture of semi-finished products of copper alloys. Spray forming of billets measuring up to 2.2 m in length and 300 mm in diameter is described below. The outstanding feature of billets manufactured in this way is their isotropic material behaviour. The wear properties of sliding rails containig graphite and manufactured from various spray-formed copper materials are improved considerably to conventionally produced tin bronze.

SYNTHESIS OF Mg-Cu-Y BULK METALLIC GLASS PLATE VIA SPRAY FORMING PROCESS

Abstract: Mg-based amorphous alloys exhibit maximum specific strength among bulk metallic glass systems. In this study, a bulk Mg65Cu25Y10 deposit was produced successfully via spray forming process with higher cooling rate than conventional mold casting route. The deposit is 300mm in diameter, 10 mm in thickness and 650 g in weight. The average porosity is about 10%. The XRD and DSC results of the deposit look similar to that obtained from corresponding amorphous melt-spun ribbon. However, the measured composition of deposit varies slightly with the distance from substrate, which attribute to gravity effect of relative heavy element, like Y and Cu. The hardness of the deposit is higher than that of melt spun ribbons. The supercooled liquid region of the deposit determined from TMA technique is about 20K smaller than that obtained from DSC trace due to the stress induced nanocrystallzation occurred in the former. In addition, the volume reduction of deposit during TMA test was also smaller than that of ribbon and shows better dimension stability.

Microstructure and Mechanical Properties of Spray Formed and Hot Pressed/HeatTreated Al-(20-30 wt%) Mg2Si-2% Cu Alloy

Abstract: In the present investigation, Al-(20-30%wt) Mg2Si-2Cu alloys were synthesized by spray forming process and further processed by hot pressing for densification. The alloys were further subjected to age hardening heat treatment. The spray formed, age hardened and as-cast alloys were characterized by microstructure and mechanical properties. The microstructure of spray formed alloys exhibited finer and evenly distributed primary β-Mg2Si particles and θ-Al2Cu phase and clusters of discrete and high volume fraction of Q-phase. As-cast alloys mainly consist of large sized polygonal primary β-Mg2Si, coarse Chinese script of Al2Cu and needle shaped eutectic Q-phase. Hot pressing of the spray formed alloy promotes the microstructural refinement, reduction in porosity, fragmentation and redistribution of secondary phases. Artificial age hardened alloys exhibits the large quantity of θ-Al2Cu precipitates less than 2 μm size uniformly distributed in the matrix. The β phase re-precipitates in a very fine spherical form results in an increase in the area fraction of β-Mg2Si phase during aging. The significant enhancement in ultimate strength in heat treated and sprays formed alloys as compared to the as-cast alloy. The SEM of fracture surfaces of tensile specimens was taken on spray formed age hardened and as cast alloys. The fractographs revealed the transformation from brittle mode to ductile dimples.