Showing papers on "Spray forming published in 1983"
TL;DR: In this paper, a new concept in solidification and casting technology is outlined which relates powder metallurgy, spray forming, and conventional casting, and it is shown that incremental solidification can he used to make products having enhanced properties.
Abstract: A new concept in solidification and casting technology is outlined which relates powder metallurgy, spray forming, and conventional casting. It is shown that incremental solidification can he used to make products having enhanced properties. Rapid solidification, very low porosity, zero segregation, fine grain size, and uniform distribution of a second phase can be accomplished in various combinations though, regrettably, not all together. A terminology appropriate to the new concept has been developed together with certain definitions. Basic equations are proposed to describe a general model spray forming, from which solutions can be derived in particular practical cases.
39 citations
TL;DR: Spray forming comprises a new generation of metal manufacturing processes for making semi-finished engineering materials as discussed by the authors, which cover such diverse products as strip and sheet having fine grain size and Rapid Solidification potential, large diameter rings and tubes, forgings, billets for extrusion and forging and spray coated steel strip with adherent and ductile coatings.
16 citations
Patent•
13 May 1983TL;DR: In this article, an improved fluid spray-forming device or showerhead which is energy efficient and produces a high fluid velocity and a forceful spray is described. But, it is not suitable for outdoor use.
Abstract: Disclosed is an improved fluid spray-forming device or showerhead which is energy efficient and produces a high fluid velocity and a forceful spray. The device has a relatively large, substantially cylindrical chamber between a restricted input flow path and a spray-forming disk. This combination changes the fluid flow properties to achieve the improved results. A pulsating spray can be obtained by proper selection of the ratios of the input, chamber and output diameters, thus making a mechanical fluid interrupter unnecessary.
13 citations
TL;DR: In this paper, the development of a new centrifugal spray forming process is outlined, from early laboratory work to the stage of industrial production, with particular attention paid to the work at AERE Harwell, where 380 mm dia. tubes were produced in Nimonic 80A.
Abstract: The development of a new centrifugal spray forming process is outlined, from early laboratory work to the stage of industrial production. Particular attention is paid to the work at AERE Harwell, where 380 mm dia. tubes were produced in Nimonic 80A. The properties of the product are related to the atomizing and deposition variables, with respect to the structures produced and the concept of incremental solidification.
6 citations
TL;DR: In this paper, it is shown that the properties of the products depend greatly upon the spray density used in the individual processes and that a low spray density can give materials that benefit from rapid solidification with resulting high mechanical properties, whereas high spray density gives products that are very near to theoretical density and can be produced at high throughputs.
5 citations