Download or read book The History of Hardening written by Hans Berns and published by Härterei Gerster AG. This book was released on 2013-02-01 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present needs the past to shape the future. As in many areas of life, heat treatments used in the past have to be studied to understand the present. The resulting conclusions can be used to shape the future. But how did heat treatment develop into a key branch of the economy in spite of its initial inadequacies? This question is the subject of this book, written by Professor Emeritus Dr.-Ing. Hans Berns and published by Härterei Gerster AG. It begins with the production of sponge iron in a bloomery hearth during the pre-Christian era and its subsequent carburisation as an essential requirement for hardening. During the Modern Period, in contrast, the high carbon content of the crude iron had to be painstakingly reduced to a level that allowed forging and hardening. The invention of mild steel in 1856 brought alloyed steels that could be hardened with thicker cross-sections, thus laying the foundations for modern hardening techniques. Härterei Gerster AG, a family business, has become the leading Swiss specialist for technical heat treatments mainly due to ongoing development cooperation with a number of academic institutions. Various development projects established a friendly relationship between Härterei Gerster AG and Prof. Hans Berns.
Download or read book Flame Hardening written by Hans Wilhelm Grönegress and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book intended for shop use tries to familiarize the reader with the peculiari ties of a hardening method which due to its many advantages is now in use,many shops. A general knowledge of the principles of hardening and heat treating is presumed. Introduction 1. The name of the process. Flame hardening is a method derived from the old quench hardening and is used for the surface hardening of heat treatable steels. Flame hardening is so named in analogy to flame cutting as the use of a flame is a distinctive feature of this process as opposed to the use of a furnace. 2. Characteristics of flame hardening. In flame hardening the area to be 6 hardened is heated with a burner of large heat capacity (approx. 0.5 · 10 kcaljhr/ meter of flame lengths or 50,000 BTUfhr/inch of flame length) supplied with a mixture of fuel gas and oxygen. The hardening temperature is thus reached in so short a time at the surface that a heat jam is created, that is, more heat is supplied to the surface than can be dissipated to the interior of the workpiece. As the querr ehing takes place immediately after the heating the penetration of the heat to greater depth is prevented and only the outer layer subject to wear is hardened. The core of the workpiece remains unaffected by this heat treatment in cantrast to the other hardening methods where the entire piece is through heated in a furnace.
Download or read book Work hardening of dual phase steel written by Rieger, Florian and published by KIT Scientific Publishing. This book was released on 2016-07-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-phase steels exhibit good mechanical properties due to a microstructure of strong martensitic inclusions embedded in a ductile ferritic matrix. This work presents a two-scale model for the underlying work-hardening effects; such as the distinctly different hardening rates observed for high-strength dual-phase steels. The model is based on geometrically necessary dislocations and comprises the average microstructural morphology as well as a direct interaction between the constituents.
Download or read book Advanced High Strength Steel And Press Hardening Proceedings Of The 4th International Conference On Advanced High Strength Steel And Press Hardening Ichsu2018 written by Yisheng Zhang and published by World Scientific. This book was released on 2018-12-18 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: The automotive industry requirements for vehicle weight reduction, weight containment, improved part functionality and passenger safety have resulted in the increased use of steel grades with a fully martensitic microstructure. These steel grades are essential to improve the anti-intrusion resistance of automotive body parts and the related passenger safety during car collisions. Standard advanced high strength steel (AHSS) grades are notoriously difficult to be formed by cold stamping; they are characterized by elastic springback, poor stretch flangeability and low hole expansion ratios. Hot stamping has therefore received much attention recently as an alternative technology to produce AHSS automotive parts.In this book, selected articles from the Fourth International Conference on Advanced High Strength Steel and Press Hardening held on August 20-22th, 2018 in Hefei, China, are compiled. It focuses on AHSS for the development of press hardening of high performance sheet metal for lightweight vehicle, advanced digital manufacturing technology, as well as the physical metallurgy principles of the hot stamping process.Aiming at the process design and industrial application for hot stamping of press hardened steel and high strength aluminium alloy sheet, the effect of temperature and strain rate on the formability and mechanical properties of the products is discussed. In addition, more practical cases are provided concerning accurate modelling and multi-physics coupling simulation of the hot stamping process. Furthermore, the influence of tool design on forming process, more precise process control strategies to increase production efficiency, and the improvement of hot stamping equipment by advanced design methods will also be presented.
Download or read book Quenching Theory and Technology written by Bozidar Liscic and published by CRC Press. This book was released on 2010-07-19 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quenching is one of the most fundamentally complex processes in the heat treatment of metals, and it is something on which mechanical properties and distortion of engineering components depend. With chapters written by the most respected international experts in the field, Quenching Theory and Technology, Second Edition presents the most authoritat
Download or read book Transactions written by Iron and Steel Institute and published by . This book was released on 1899 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precipitation Hardening written by J. W. Martin and published by Elsevier. This book was released on 2016-06-03 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precipitation Hardening
Download or read book State of New York Supreme Court Appellate Division Fourth Department written by and published by . This book was released on with total page 1418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acceleration of concrete hardening by thermal curing written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1982-03-01 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Machinery and Production Engineering written by and published by . This book was released on 1917 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Iron and Steel Institute written by Iron and Steel Institute and published by . This book was released on 1899 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the institute's Proceedings.
Download or read book Handbook of Metallurgical Process Design written by George E. Totten and published by CRC Press. This book was released on 2004-05-25 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviewing an extensive array of procedures in hot and cold forming, casting, heat treatment, machining, and surface engineering of steel and aluminum, this comprehensive reference explores a vast range of processes relating to metallurgical component design-enhancing the production and the properties of engineered components while reducing manufacturing costs. It surveys the role of computer simulation in alloy design and its impact on material structure and mechanical properties such as fatigue and wear. It also discusses alloy design for various materials, including steel, iron, aluminum, magnesium, titanium, super alloy compositions and copper.
Download or read book Marine Structural Design written by Yong Bai and published by Elsevier. This book was released on 2003-08-05 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new reference describes the applications of modern structural engineering to marine structures. It will provide an invaluable resource to practicing marine and offshore engineers working in oil and gas as well as those studying marine structural design. The coverage of fatigue and fracture criteria forms a basis for limit-state design and re-assessment of existing structures and assists with determining material and inspection requirements. Describing applications of risk assessment to marine and offshore industries, this is a practical and useful book to help engineers conduct structural design.*Presents modern structural design principles helping the engineer understand how to conduct structural design by analysis*Offers practical and usable theory for industrial applications of structural reliability theory
Download or read book New York Supreme Court written by and published by . This book was released on with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Materials written by Colin Humphreys and published by CRC Press. This book was released on 2020-01-29 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a very special book for two reasons. First, it is a tribute to Professor Sir Peter Hirsch from his students, colleagues and friends. Second, it is a collection of specially written review articles by world-class scientists that take the readers from the origins of modem materials science through to the cutting edge of the subject in the twenty- first century. The book will be a valuable resource for all researchers in materials science, particularly those specialising in electron microscopy and diffraction, and in the mechanical properties of materials. The front and back covers of this book are coloured images of historic electron micrographs depicting the first observation in the world of moving dislocations. The pictures were taken by Mike Whelan, then a research student of Peter Hirsch. The image on the front cover is before some dislocations have moved, and the back cover image is after the movement. See if you can spot the difference! This book had its genesis in a symposium organised by Mike Goringe, John Hutchison and myself to mark the retirement of Peter Hirsch from the Isaac Wolfson Chair of Metallurgy at Oxford. This symposium brought together a large number of Peter's former students and colleagues. Some of the most distinguished of these have now written the chapters in this book. The opening chapter, by Professor Ugo Valdre, provides a fascinating biographical sketch of Peter Hirsch from his early career in Cambridge to his retirement in Oxford. It contains many illuminating insights into the personality of Peter, both as a scientist and as a man. The next two chapters focus on the development of electron microscopy and diffraction. Professor Mike Whelan gives an eye-witness account of the seminal early work of Peter and his colleagues at Cambridge on the first observation of dislocations and their movements, using trans-mission electron microscopy. Professor Archie Howie extends this account to the present day, describing nanometer-scale resolution in scanning electron microscopes and atomic scale resolution in the scanning tunnelling microscope.
Download or read book Forging Stamping Heat Treating written by and published by . This book was released on 1928 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
