Download or read book Replacement of Chromium Electroplating on Gas Turbine Engine Components Using Thermal Spray Coatings written by and published by . This book was released on 2005 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard chromium electroplating is extensively used by aircraft manufacturers and military maintenance depots to provide wear and/or corrosion resistance or to restore dimensional tolerance to components. However, chrome plating utilizes hexavalent chromium, which is a highly toxic carcinogen, and increasingly, stringent environmental and worker-safety regulations are making chrome plating more expensive for the DoD. This document constitutes the final report on a project to qualify high-velocity oxygen-fuel (HVOF) and plasma thermal spray coatings as a replacement for hard chrome plating on gas turbine engine components. Extensive fatigue, fretting wear, salt-fog corrosion, and carbon-seal wear tests were performed on HVOF, WC/17Co, Tribaloy 400, Tribaloy 800, and Cr3C2/20(NiCr), and plasma-sprayed Tribaloy 400 coatings compared to hard chromium. In general, the HVOF WC/17Co coatings demonstrated superior performance. An accelerated test on a TF33 engine containing seven components coated with HVOF WC/17Co showed superior performance to what would have been expected using the standard hard chromium. A cost/benefit analysis indicates that military repair depots that overhaul gas turbine engines can realize substantial savings by converting from hard chrome to HVOF.

Download or read book Validation of HVOF WC Co Thermal Spray Coatings as a Replacement for Hard Chrome Plating on Aircraft Landing Gear written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard chromium electroplating is extensively used by aircraft manufacturers and military maintenance depots to provide wear and/or corrosion resistance or to restore dimensional tolerance to components. However, chrome plating utilizes hexavalent chromium, which is a highly toxic carcinogen, and increasingly stringent environmental and worker-safety regulations are making chrome plating more expensive for the DoD. This document constitutes the final report on a project to quality high-velocity oxygen-fuel (HVOF) thermal spray WC/Co coatings as a replacement for hard chrome plating on landing gear components. Extensive fatigue, wear, corrosion, impact, and hydrogen embrittlement test results comparing the WC/Co coatings against hard chrome are presented. The results of rig and flight-testing of HVOF WC/Co coatings on landing gear components are also presented. in general, the performance of the WC/Co coatings was superior to hard chrome. Producibility issues such as stripping, grinding, and non-destructive inspection of the coatings were addressed. Cost/Benefit analyses indicate that military repair depots that overhaul landing gear can realize substantial savings by converting from hard chrome to HVOF. Specifications were developed for the WC/Co powder, the coatings deposition parameters, and the grinding of the WC/Co coatings.

Download or read book Thermal Spray 2001 written by Christopher C. Berndt and published by ASM International. This book was released on 2001-01-01 with total page 1338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Plasma Spray Coatings as an Alternative to Hard Chrome Plating on Internal Surfaces written by and published by . This book was released on 2006 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard chromium electroplating is extensively used by aircraft manufacturers and military maintenance depots to provide wear and/or corrosion resistance or to restore dimensional tolerance to components. However, chrome plating utlizes hexavalent chromium, which is a highly toxic carcinogen, with increasingly stringent government regulations making it more expensive for DoD. This document constitutes the final report on an investigation of deposition of coatings using miniature plasma spray guns that could replace hard chromium on internal surfaces where conventional thermal spray technologies could not be used. The coatings investigated included WC/Co, WC/Co with an Ni self-fluxing alloy, WC/CrC/Ni, and Tribaloy 400. Materials tests showed that all of the carbide coatings demonstrated sliding and abrasive wear performance equivalent or superior to hard chromium. Electrochemical corrosion measurements generally showed inferior corrosion performance. A cost analysis indicated that plasma spraying was comparable to hard chromium using larger guns on cylindrical components with internal diameters of the order of 4" but for smaller diameters the plasma spray costs would be somewhat higher. However, turnaround times could be greatly reduced because of fewer process steps, including the elimination of the 24-hour bakeout to remove hydrogen incorporated during chrome plating.

Download or read book Plating and Surface Finishing written by and published by . This book was released on 2004 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nickel and Chromium Plating written by J. K. Dennis and published by Elsevier. This book was released on 1993-10-31 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade the engineering applications for nickel and chromium coatings have gained in importance. In this third edition the chapter dealing with engineering applications has been updated and expanded to include more information on electroforming and composite coatings, and engineering applications have been emphasised in the additions to the chapter on autocatalytic deposition of nickel. Additions have been made to the sections on pulse plating and use or rotating cathodes, and the section on trivalent chromium has been extended.

Download or read book Chromium Electroplating Alternatives Reference written by and published by . This book was released on 1997 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Replacement of Hard Chrome Electroplating by Tungsten Carbide Based High Velocity Oxygen Fueled Thermal Spray written by Matthew H. Leahey and published by . This book was released on 2009 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts written by and published by . This book was released on 1999 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Science Technology Index written by and published by . This book was released on 2000 with total page 1688 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sliding Wear Behavior of Tungsten Carbide WC Thermal Spray Coatings for Replacement of Chromium Electroplate in Aircraft Applications written by Annie Cyrilla Savarimuthu and published by . This book was released on 2000 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of HVOF Thermal Spray Coatings for Hard Chrome Replacement in Landing Applications written by SAE Committee A-5--Aerospace Landing Gear Systems and published by . This book was released on 2007 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern Cold Spray written by Julio Villafuerte and published by Springer. This book was released on 2015-08-24 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the current state of the art of the novel cold spray process. Cold spray is a solid state metal consolidation process, which allows engineers to tailor surface and shape properties by optimizing process parameters, powder characteristics and substrate conditions for a wide variety of applications that are difficult or impossible by other techniques. Readers will benefit from this book's coverage of the commercial evolution of cold spray since the 1980's and will gain a practical understanding of what the technology has to offer.

Download or read book Metal Finishing written by and published by . This book was released on 1940 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Spraying for Power Generation Components written by Klaus Erich Schneider and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thousands of patents address new coating types, new developments, new chemical compositions. However, sometimes coatings is still considered as an "art". This book now deals with questions that are essential for a good performance of this "art": Is there a given process stability? Is there an inherent process capability for a given specification which cannot be improved? What is the right preventive maintenance strategy? Is there a chance to end up with coating process capabilities in the order of other manufacturing processes? This book is not a pure scientific book. It is of most value for the engineer involved in design, processing and application of thermally spayed coatings: To understand the capability and limitations of thermal spraying, to understand deposition efficiency (waste of powder) and the importance of maintenance and spare parts for quick change over of worn equipment, to use offline programming and real equipment in an optimum mix to end up with stable processes in production after shortest development time and in the end to achieve the final target in production: process stability at minimum total cost.

Download or read book Introduction to Surface Engineering written by P. A. Dearnley and published by Cambridge University Press. This book was released on 2017-01-16 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly illustrated reference work covers the three principal types of surface technologies that best protect engineering devices and products: diffusion technologies, deposition technologies, and other less commonly acknowledged surface engineering (SE) techniques. Various applications are noted throughout the text and additionally whole chapters are devoted to specific SE applications across the automotive, gas turbine engine (GTE), metal machining, and biomedical implant sectors. Along with the benefits of SE, this volume also critically examines SE's limitations. Materials degradation pathways - those which can and those which cannot be mitigated by SE - are rigorously explained. Written from a scientific, materials engineering perspective, this concise text is supported by high-quality images and photo-micrographs which show how surfaces can be engineered to overcome the limits of conventionally produced materials, even in complex or hostile operating environments. This book is a useful resource for undergraduate and postgraduate students as well as professional engineers.