Investigation of Two-wire Arc Spray Process PDF Download

Author: Xiaochuan Wang
Publisher:
ISBN:
Category : Metal spraying
Languages : en
Pages : 370

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Author: Nakhleh Ameen Hussary
Publisher:
ISBN:
Category :
Languages : en
Pages : 300

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Author: Nakhleh Ameen Hussary
Publisher:
ISBN:
Category : Chemical vapor deposition
Languages : en
Pages : 318

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Author: AmirHossein Pourmousa Abkenar
Publisher:
ISBN: 9780494397237
Category :
Languages : en
Pages : 268

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Protective coatings are important to metal working. Thermal spray is a rapidly growing market, and wire-arc spraying is gaining a significant share of this market because of its low operating/equipment costs and high material/energy efficiency. Although wire-arc spraying is widely used, many of its underlying processes are not yet fundamentally understood. This work examines and explains different aspects of a wire-arc system. Shortly after primary breakups, the detached particles break up into smaller particles (secondary atomization). The size and velocity of such particles were measured in-flight using a DPV-2000 system for a range of operating parameters. A technique was developed to identify and separate the size distributions of particles produced by atomization of molten metal at either the anode or cathode by assuming that both follow a log-normal distribution. (This assumption was also verified experimentally). It was shown that particles produced by the anode are almost two times larger than those originating from the cathode. Furthermore, effect of operating parameters on size distribution of anodic and cathodic particles was investigated. In wire-arc spraying, two consumable wires are continuously fed into the gun. An electric arc is struck between the tips of these two wires and continuously melts their material. A cross-flow gas removes the molten material from the wire-tips and accelerates them towards a substrate, over which the detached particles form a protective coating layer. Experiments were also conducted to study the effect of impact velocity and substrate temperature on the properties of individual wire-arc splats and coatings. Aluminum was sprayed onto polished stainless-steel coupons maintained at temperatures ranging from 25°C to 450°C. At low substrate temperature, droplets splashed, forming irregular splats; at higher temperatures there was no splashing and splats formed circular disks. The temperature at which the transition occurred decreased with increasing impact velocity. An imaging system was developed to take pictures of the arc, and determine its length and shape. Using the information extracted from such pictures, a computational fluid dynamic model of the wire-arc torch was developed to estimate the shear stresses on the wire-tips and also sizes of primary breakups from the two electrodes.

Author: Joseph R. Davis
Publisher: ASM International
ISBN: 0871707950
Category : Reference
Languages : en
Pages : 344

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This reference covers principles, processes, types of coatings, applications, performance, and testing and analysis of thermal spray technology. It will serve as an introduction and guide for those new to thermal spray, and as a reference for specifiers and users of thermal spray coatings and thermal spray experts. Coverage encompasses basics of th

Author: Pierre L. Fauchais
Publisher: Springer Science & Business Media
ISBN: 0387689915
Category : Technology & Engineering
Languages : en
Pages : 1587

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This book provides readers with the fundamentals necessary for understanding thermal spray technology. Coverage includes in-depth discussions of various thermal spray processes, feedstock materials, particle-jet interactions, and associated yet very critical topics: diagnostics, current and emerging applications, surface science, and pre and post-treatment. This book will serve as an invaluable resource as a textbook for graduate courses in the field and as an exhaustive reference for professionals involved in thermal spray technology.

Author: Vladislav Boronenkov
Publisher: Springer
ISBN: 3319223062
Category : Technology & Engineering
Languages : en
Pages : 266

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This book guides readers through the systematic analysis of Arc Spraying: one of the most widespread and important thermal spraying methods. Along the way, readers from industry and research laboratories become familiar with the features of the process and physical-chemical regulations of particles in flight, coating formation, internal coating properties, and their output parameters. The book is ideal for engineers, technicians, and scientists engaged in welding and thermal spraying and stands as an excellent reference for students interested in advanced coatings technology.

Author:
Publisher: ASM International
ISBN: 1615031014
Category : Metal spraying
Languages : en
Pages : 1147

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Author: K.H. Stern
Publisher: Springer Science & Business Media
ISBN: 9400915012
Category : Science
Languages : en
Pages : 353

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Book Description
Surface engineering is an increasingly important field and consequently those involved need to be aware of the vast range of technologies available to modify surfaces. This text provides an up-to-date, authoritative exposition of the major condensed phase methods used for producing metallurgical and ceramic coatings. Each method is discussed thoroughly by an expert in that field. In each chapter the principle of the method, its range of applications and technical aspects involved are described. The book not only informs the reader about established technologies familiar only to specialists, but also details activity on the frontier of coating technology providing an insight into those potential technologies not yet fully developed but which should emerge in the near future.

Author: Milind Kelkar
Publisher:
ISBN:
Category :
Languages : en
Pages : 532

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