Author : Bozidar Liscic
Publisher : CRC Press
Page : 728 pages
File Size : 13,35 MB
Release : 2010-07-19
Category : Science
ISBN : 1420009168
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
Author : Bozidar Liscic
Publisher : Springer Science & Business Media
Page : 499 pages
File Size : 37,64 MB
Release : 2013-11-11
Category : Technology & Engineering
ISBN : 366201596X
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.
Author : ASM Heat Treating Society. Conference and Exposition
Publisher : ASM International
Page : 608 pages
File Size : 18,99 MB
Release : 2003-01-01
Category : Technology & Engineering
ISBN : 1615032614
Author : George E. Totten
Publisher : ASM International
Page : 528 pages
File Size : 40,8 MB
Release : 1993-01-01
Category : Technology & Engineering
ISBN : 9781615031726
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
Author : Ping Hu
Publisher : Springer Science & Business Media
Page : 218 pages
File Size : 31,52 MB
Release : 2012-07-23
Category : Technology & Engineering
ISBN : 1447140990
Over the last 15 years, the application of innovative steel concepts in the automotive industry has increased steadily. Numerical simulation technology of hot forming of high-strength steel allows engineers to modify the formability of hot forming steel metals and to optimize die design schemes. Theories, Methods and Numerical Technology of Sheet Metal Cold and Hot Forming focuses on hot and cold forming theories, numerical methods, relative simulation and experiment techniques for high-strength steel forming and die design in the automobile industry. Theories, Methods and Numerical Technology of Sheet Metal Cold and Hot Forming introduces the general theories of cold forming, then expands upon advanced hot forming theories and simulation methods, including: the forming process, constitutive equations, hot boundary constraint treatment, and hot forming equipment and experiments. Various calculation methods of cold and hot forming, based on the authors’ experience in commercial CAE software for sheet metal forming, are provided, as well as a discussion of key issues, such as hot formability with quenching process, die design and cooling channel design in die, and formability experiments. Theories, Methods and Numerical Technology of Sheet Metal Cold and Hot Forming will enable readers to develop an advanced knowledge of hot forming, as well as to apply hot forming theories, calculation methods and key techniques to direct their die design. It is therefore a useful reference for students and researchers, as well as automotive engineers.
Author : S Steeb
Publisher : Elsevier
Page : 1163 pages
File Size : 25,48 MB
Release : 2012-12-02
Category : Technology & Engineering
ISBN : 0444601112
Rapidly Quenched Metals, Volume I covers the proceedings of the Fifth International Conference on Rapidly Quenched Metals, held in Wurzburg, Germany on September 3-7, 1984. The book focuses on amorphous and crystalline metals formed by rapid quenching from the melt. The selection first covers the scope and trends of developments in rapid solidification technology, rapid solidification, and undercooling of liquid metals by rapid quenching. Discussions focus on experimental method, powders, strip, particulate production, consolidation, and alloys and alloy systems. The text then examines the solidification of undercooled liquid alloys entrapped in solid; crystallization kinetics in undercooled droplets; and grain refinement in bulk undercooled alloys. The manuscript tackles the undercooling of niobium-germanium alloys in a 100 meter drop tube; influence of process parameters on the cooling rate of the meltspinning process; and the mechanism of ribbon formation in melt-spun copper and copper-zirconium. The formation and structure of thick sections of rapidly-solidified material by incremental deposition and production of ultrafine dispersions of rare earth oxides in Ti alloys using rapid solidification are also mentioned. The selection is a valuable reference for physicists, chemists, physical metallurgists, and engineers.
Author : Dmitri B Papkovsky
Publisher : Royal Society of Chemistry
Page : 384 pages
File Size : 28,46 MB
Release : 2018-05-25
Category : Science
ISBN : 1788014553
Significant progress has been made in recent years in quenched-phosphorescence oxygen sensing, particularly in the materials and applications of this detection technology that are open to commercialization, like uses in brain imaging and food packaging. Prompted by this, the editors have delivered a dedicated book that brings together these developments, provides a comprehensive overview of the different detection methodologies, and representative examples and applications. This book is intended to attract new researchers from various disciplines such as chemistry, physics, biology and medicine, stimulate further progress in the field and assist in developing new applications. Providing a concise summary at the cutting edge, this practical guide for current experts and new potential users will increase awareness of this versatile sensing technology.
Author : George E. Totten
Publisher : CRC Press
Page : 992 pages
File Size : 48,56 MB
Release : 2004-05-25
Category : Technology & Engineering
ISBN : 9780203970928
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.
Author :
Publisher :
Page : 234 pages
File Size : 39,81 MB
Release : 2010
Category : Steel
ISBN : 9781628702347
Author : Xinmin Luo
Publisher :
Page : 28 pages
File Size : 48,1 MB
Release : 2018
Category : Plates, Iron and steel
ISBN :
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.
