Download or read book Evolution from Cooling Modeling to Cooling Engineering of the Steel Quenching Process A Technology Overview written by Xinmin Luo and published by . This book was released on 2018 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The type of heat treatment process used is mainly determined by its cooling mode. Hardening is a metal heat treatment during which the most critical operation is cooling. Most quenchants used for steel hardening are vaporizable liquids, such as water, petroleum oils, emulsions, aqueous polymer solutions, or brines. Testing methodologies that include ISO 9950, Industrial Quenching Oils-determination of Cooling Characteristics-Nickel-alloy Probe Test Method, and ASTM Standards: D6200, Standard Test Method for Determination of Cooling Characteristics of Quench Oils by Cooling Curve Analysis, D6482, Standard Test Method for Determination of Cooling Characteristics of Aqueous Polymer Quenchants by Cooling Curve Analysis with Agitation (Tensi Method), D6549, Standard Test Method for Determination of Cooling Characteristics of Quenchants by Cooling Curve Analysis with Agitation (Drayton Unit), and D7646, Standard Test Method for Determination of Cooling Characteristics of Aqueous Polymer Quenchants for Aluminum Alloys by Cooling Curve Analysis, are typically used to evaluate the cooling characteristics of these quenchants or processes. The cooling time-temperature curves obtained by these methodologies traditionally involve three stages of cooling. However, the relationship between this model and heat treatment, especially between hardening theory and practice, has not been satisfactory. Therefore, it is necessary to better understand the relationship between cooling theory and metallurgical behavior to create a new cooling model that achieves zero distortion, zero dispersion of quality, and zero pollution, which are concepts proposed in the "Heat Treating Industry Vision 2020 "and the "Heat Treating Technology Roadmap 2004" by the ASM Heat Treating Society and Materials Treating Institute. The relationship between the physical metallurgical phenomenon of phase transformation of a steel workpiece during quenching after being austenitized and the actual cooling conditions in engineering practice were analyzed and discussed in this report. Additionally, the development of advanced cooling technologies and related quenching equipment are discussed. The evolution from cooling model research to cooling engineering construction represents important progress in heat treatment practice.
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 908 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 Theory and Technology of Quenching written by Bozidar Liscic and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat treatment of metallic alloys constitutes an important step within the production process. The heat treatment process itself is considered as a cycle of heating the workpieces to a predetermined temperature, keeping them at this temperature for the time period required, and cooling them to room temperature in an appropriate way. The process of heating and keeping workpieces at the required temperature is now adays weil mastered and mostly automatized. The process of cooling or quenching which determines actually the resulting properties, is handicapped with many physical and technical uncertainties. Good results can already be obtained predominantly by using empirically based practice. But increased demands on the properties of the pro ducts as weIl as demands on safety and environment conditions of the quenching media require efforts to investigate the details of the quenching process and to transfer the results of the research to practical application. Advances in the knowledge about quenching processes have been achieved by modem applied thermodynamics especially by the heat and mass transfer researches; further the application of computer technology was helpful to new approaches in quenching pro cesses. Special emphases has been given to: - The theory of heat transfer and heat exchange intensification during quenching - Wetting kinematics - Residual stresses after quenching - Determination of the quenching intensity - Prediction of microstructural transformation and hardness distribution after quenching, the latter with some limitations.
Download or read book Handbook of Thermal Process Modeling Steels written by Cemil Hakan Gur and published by CRC Press. This book was released on 2008-12-22 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Emerging Tool for Pioneering Engineers Co-published by the International Federation of Heat Treatment and Surface Engineering.Thermal processing is a highly precise science that does not easily lend itself to improvements through modeling, as the computations required to attain an accurate prediction of the microstructure and properties of work
Download or read book Intensive Quenching Systems written by and published by . This book was released on 2010 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Quenchants and Quenching Technology written by George E. Totten and published by ASM International(OH). This book was released on 1993 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Authoritative Source: The Handbook of Quenchants and Quenching Technology is just what you need to learn both the theory and application of quenching. This book provides much-needed information on the selection and use of numerous types of quenching. For example, oil, water, salt, aqueous polymers, brine, fluidized bed, and high-pressure gas quenching are all discussed in detail. Less commonly used quenchants such as quenching into a magnetic medium, ultrasonic quenching, aus-bay quenching, HIP quenching, etc., are also discussed. Contents include: Introduction to Heat Treating of Steel Measuring Hardenability and Quench Severity Cooling Curve Analysis Quenching Oils Polymer Quenchants Quench Bath Maintenance Spray Quenching Other Quenching Media Quench Bath Design Impeller Agitation Quench Distortion
Download or read book Investigation and Development of Spray Cooling Device for Heat Treatment of Large Steel Forgings written by M. Maisuradze and published by . This book was released on 2014 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods for determining the main service characteristics of cooling devices (irrigation density, its distribution on the cooling surface, and dependence of the heat-transfer coefficient versus temperature) are described. An investigation of technological and design parameters of spraying jets and their effect on cooling capability of large steel forgings (e.g., hot-rolling mill rolls) are presented. The technological parameters under consideration are water pressure in spraying jets and the number of spraying jets in a cooling device. The varied design parameters of spraying jets are the diameters of the channels in spraying jets, the distance between the jets, and the distance from the cooling surface. The results of the experiments were applied to obtain the dependency between technological and design parameters versus main service characteristics of spraying jets to develop and optimize the technology of heat treatment of large steel forgings. These relations were applied for modeling spray cooling of hot-rolling mill rolls.
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 Development of an Ultra Fast Cooling Concept Based on the Dispersion of a Liquid Hydrocarbon in a Continuous Heat Treatment Line for Steel Strips ULTRA DRY COOLING written by and published by . This book was released on 2014 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ultra Dry Cooling project objective is to validate and facilitate the industrial transfer of a rupture technology. This technology is a new steel strip cooling method that offers very high cooling rates, while in the same time being inert for the strip, to enable metallic coating directly after cooling. The basic principle of Ultra Dry Cooling is to spray a liquid hydrocarbon on the hot strip, a part of the hydrocarbon being vaporized at the contact between droplets and the steel surface. The liquid and vapor phases are recovered in a closed loop. Several key steps have been defined to secure the industrialization. It includes at first the establishment of experimental correlation of heat transfer on a laboratory test bench. Then a complete safety study has been conducted to secure the industrial design. An Endless Strip Bench has been built and commissioned based on this design, and tests have been undertaken for pentane and then hayeptane as cooling fluid, after modification of the bench. Good behavior and high cooling performances have been demonstrated on the bench with heptane as a cooling fluid. The last part of the project focused on the basic engineering of the industrial design of the system using heptane, and on a deep study of steel surface quality after being cooled down by heptane. Conclusions are very encouraging, as an industrial solution has been determined, cooling performance and surface quality demonstrated. Finally, potential applications of the technology have been highlighted through contacts with main steelmakers.
Download or read book Encyclopedia of Iron Steel and Their Alloys Online Version written by Rafael Colás and published by CRC Press. This book was released on 2016-01-06 with total page 3918 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first of many important works featured in CRC Press’ Metals and Alloys Encyclopedia Collection, the Encyclopedia of Iron, Steel, and Their Alloys covers all the fundamental, theoretical, and application-related aspects of the metallurgical science, engineering, and technology of iron, steel, and their alloys. This Five-Volume Set addresses topics such as extractive metallurgy, powder metallurgy and processing, physical metallurgy, production engineering, corrosion engineering, thermal processing, metalworking, welding, iron- and steelmaking, heat treating, rolling, casting, hot and cold forming, surface finishing and coating, crystallography, metallography, computational metallurgy, metal-matrix composites, intermetallics, nano- and micro-structured metals and alloys, nano- and micro-alloying effects, special steels, and mining. A valuable reference for materials scientists and engineers, chemists, manufacturers, miners, researchers, and students, this must-have encyclopedia: Provides extensive coverage of properties and recommended practices Includes a wealth of helpful charts, nomograms, and figures Contains cross referencing for quick and easy search Each entry is written by a subject-matter expert and reviewed by an international panel of renowned researchers from academia, government, and industry. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automotive Manufacturing Processes written by G.K. Awari and published by CRC Press. This book was released on 2023-07-14 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automotive Manufacturing Processes discusses basic principles and operational procedures of automotive manufacturing processes, issues in the automotive industry like material selection, and troubleshooting. Every chapter includes specific learning objectives, multiple-choice questions to test conceptual understanding of the subject and put theory into practice, review questions, solved problems, and unsolved exercises. It covers important topics including material decision-making processes, surface hardening processes, heat treatment processes, effects of friction and velocity distribution, the metallurgical spectrum of forging, and surface finishing processes. Features: Discusses automotive manufacturing processes in a comprehensive manner with the help of applications. Provides case studies addressing issues in the automotive industry and manufacturing operations in the production of vehicles. Discussion on material properties while laying emphasis on the materials and processing parameters. Covers applications and case studies of the automotive industry. The text will be useful for senior undergraduates, graduate students and academic researchers in areas including automobile engineering, industrial and manufacturing engineering and mechanical engineering.
Download or read book Microstructure Evolution in Metal Forming Processes written by J Lin and published by Elsevier. This book was released on 2012-07-09 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring and control of microstructure evolution in metal processing is essential in developing the right properties in a metal. Microstructure evolution in metal forming processes summarises the wealth of recent research on the mechanisms, modelling and control of microstructure evolution during metal forming processes. Part one reviews the general principles involved in understanding and controlling microstructure evolution in metal forming. Techniques for modelling microstructure and optimising processes are explored, along with recrystallisation, grain growth, and severe plastic deformation. Microstructure evolution in the processing of steel is the focus of part two, which reviews the modelling of phase transformations in steel, unified constitutive equations and work hardening in microalloyed steels. Part three examines microstructure evolution in the processing of other metals, including ageing behaviour in the processing of aluminium and microstructure control in processing nickel, titanium and other special alloys. With its distinguished editors and international team of expert contributors, Microstructure evolution in metal forming processes is an invaluable reference tool for metal processors and those using steels and other metals, as well as an essential guide for academics and students involved in fundamental metal research. Summarises the wealth of recent research on the mechanisms, modelling and control of microstructure evolution during metal forming processes Comprehensively discusses microstructure evolution in the processing of steel and reviews the modelling of phase transformations in steel, unified constitutive equations and work hardening in microalloyed steels Examines microstructure evolution in the processing of other materials, including ageing behaviour in the processing of aluminium
Download or read book The Technical Review written by and published by . This book was released on 1919 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Conference on Advances in Surface Treatment Research Applications ASTRA written by and published by . This book was released on 2004 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Aluminum and Its Alloys Two Volume Set Print written by George E. Totten and published by CRC Press. This book was released on 2018-12-07 with total page 2957 pages. Available in PDF, EPUB and Kindle. Book excerpt: This encyclopedia, written by authoritative experts under the guidance of an international panel of key researchers from academia, national laboratories, and industry, is a comprehensive reference covering all major aspects of metallurgical science and engineering of aluminum and its alloys. Topics covered include extractive metallurgy, powder metallurgy (including processing), physical metallurgy, production engineering, corrosion engineering, thermal processing (processes such as metalworking and welding, heat treatment, rolling, casting, hot and cold forming), surface engineering and structure such as crystallography and metallography.
Download or read book Handbook of Residual Stress and Deformation of Steel written by George E. Totten and published by ASM International. This book was released on 2002 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Examines the factors that contribute to overall steel deformation problems. The 27 articles address the effect of materials and processing, the measurement and prediction of residual stress and distortion, and residual stress formation in the shaping of materials, during hardening processes, and during manufacturing processes. Some of the topics are the stability and relaxation behavior of macro and micro residual stresses, stress determination in coatings, the effects of process equipment design, the application of metallo- thermo-mechanic to quenching, inducing compressive stresses through controlled shot peening, and the origin and assessment of residual stresses during welding and brazing. Annotation c. Book News, Inc., Portland, OR (booknews.com)
