Grain-Boundary Carbides in High-Speed Tool and Hot-Work Die Steels PDF Download
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Author: B. R. Banerjee
Publisher:
ISBN:
Category : Carbides
Languages : en
Pages : 13
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Book Description
Rapid etching and clear delineation of prior austenite grain boundaries are characteristic of tool steels upon rapid quenching from sufficiently high austenizing temperatures and of hot-work die steels upon arrested quenching. In this study, two tool steels (M2 and M10 types) and a hot-work die steel (H21 type) were heat treated under a variety of austenizing conditions and examined by extraction replica electron microscopy. In each case, the grain-boundary delineation observed under light metallography was associated with the presence of discrete carbide particles. The presence of these carbides at grain boundaries accelerates the etching rates and delineates the boundaries at the lower scale of resolution in light metallography. The various boundary carbides were identified, and the carbide-precipitation kinetics were quantitatively related to interstitial supersaturation in the alloy. An interesting observation was the presence of M2C as grain-boundary carbides and as residual carbides in the high-speed tool steels.
Author: B. R. Banerjee
Publisher:
ISBN:
Category : Carbides
Languages : en
Pages : 13
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Book Description
Rapid etching and clear delineation of prior austenite grain boundaries are characteristic of tool steels upon rapid quenching from sufficiently high austenizing temperatures and of hot-work die steels upon arrested quenching. In this study, two tool steels (M2 and M10 types) and a hot-work die steel (H21 type) were heat treated under a variety of austenizing conditions and examined by extraction replica electron microscopy. In each case, the grain-boundary delineation observed under light metallography was associated with the presence of discrete carbide particles. The presence of these carbides at grain boundaries accelerates the etching rates and delineates the boundaries at the lower scale of resolution in light metallography. The various boundary carbides were identified, and the carbide-precipitation kinetics were quantitatively related to interstitial supersaturation in the alloy. An interesting observation was the presence of M2C as grain-boundary carbides and as residual carbides in the high-speed tool steels.
Author: Peter Payson
Publisher:
ISBN:
Category : Machine-tools
Languages : en
Pages : 378
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Author:
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 144
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Author: George Krauss
Publisher: ASM International
ISBN: 1615030506
Category : Electronic book
Languages : en
Pages : 613
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Book Description
Steels: Processing, Structure, and Performance is a comprehensive guide to the broad, dynamic physical metallurgy of steels. The volume is an extensively revised and updated edition of the classic 1990 book Steels: Heat Treatment and Processing Principles. Eleven new chapters expand the coverage in the previous edition, and other chapters have been reorganized and updated. This volume is an essential reference for anyone who makes, uses, studies, or designs with steel. The interrelationships between chemistry, processing, structure, and performance--the elements of physical metallurgy--are integrated for all the types of steel discussed. The evolution, characterization, and performance of steel microstructures are described, with increased emphasis on deformation and fracture. Heat treatment remains a vital aspect of the manufacture of steel products, and the coverage of thermal processing and its effect on steels is expanded in this edition. Dramatic changes in steel manufacture have occurred in the 15 years since the publication of the 1990 edition. Low-carbon sheet steels have experienced the most dynamic changes: thermal processing of sheet steels on a massive continuous scale has produced new grades with only subtle changes in chemistry. Low carbon sheet steels, together with strengthening mechanisms, developments in microalloyed forging steels, steels with bainitic and a variety of ferritic microstructures, quench and tempered steel performance, high-carbon steels for rail and ultra-high strength wire, and the causes of low toughness and embrittlement are all discussed in new chapters. Brief coverage is provided on the history of steel, including the time frame for important developments. A link to steelmaking and solidification is made in the chapter on the effects of primary processing on steel microstructure. The text is meant to be informative, readable, up-to-date, and self contained. Principles, concepts, and understanding of microstructural evolution and performance, within the framework of processing and properties, are illustrated, by plots of data, micrographs and schematic diagrams. A special effort has been made to include references to the most pertinent books, reviews, and technical papers on a given subject. About the Author Dr. George Krauss is currently University Emeritus Professor at the Colorado School of Mines and a metallurgical consultant specializing in steel microstructural systems. He served at Lehigh University as Assistant Professor, Associate Professor, and Professor of Metallurgy and Materials Science from 1963 to 1975, and in 1975, joined the faculty of the Colorado School of Mines as the AMAX Foundation Professor in Physical Metallurgy. He was the John Henry Moore Professor of Metallurgical and Materials Engineering at the time of his retirement from the Colorado School of Mines in 1997. In 1984, Dr. Krauss was a principal in the establishment of the Advanced Steel Processing and Products Research Center, a National Science Foundation Industry-University cooperative research center at the Colorado School of Mines, and served as its first Director until 1993. In addition to the three editions of the present volume, he coauthored the book Tool Steels, Fifth Edition, ASM International, 1998, and edited or co-edited conference volumes on tempering of steel, carburizing, zinc-based coatings on steel, and microalloyed forging steels. He has published over 300 papers and lectured widely in technical conferences, universities, corporations and ASM International chapters, including a number of keynote, invited and honorary lectures. He presented the Edward DeMille Campbell Memorial Lecture of ASM International in 2000 and the Howe Memorial Lecture of the Iron and Steel Society in 2003. Dr. Krauss has served as the President of the International Federation of Heat Treatment and Surface Engineering (IFHTSE), 1989-91, and as President of ASM International, 1996-97. He is Fellow of ASM International, TMS, and IFHTSE. He has been awarded the Adolf Martens Medal of the German Society for Heat Treatment and Materials, the Charles S. Barrett Silver Medal of the Rocky Mountain Chapter of ASM, the George Brown Gold Medal of 3.
Author: Rafael A. Mesquita
Publisher: CRC Press
ISBN: 1351722298
Category : Technology & Engineering
Languages : en
Pages : 312
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Book Description
This handy book provides a single, up-to-date source of information for increasing the life of tool steels through optimized design and manufacturing. Supplying a solid understanding of the metallurgy involved, the text explains how material compositions, manufacturing processes, heat treatments, surface hardening techniques, and coatings affect tool steel properties, grades, and performance. It also explores real-life case studies and failure analyses, offering examples of die-life parameters and hints for modifying tool steels and heat treatments during cutting or forming processes. While the book offers deep coverage of properties, microstructure, and manufacturing, its focus is on describing the performance of each application of this special class of ferrous materials. Provides a single, up-to-date source of information for increasing the life of tool steels through optimized design and manufacturing. Explains how material compositions, manufacturing processes, heat treatments, surface hardening techniques, and coatings affect tool steel properties, grades, and performance. Supplies a solid understanding of the metallurgy involved in tool steel manufacturing, machining, hot and cold working, and molding. Offers examples of die-life parameters and hints for modifying tool steels and heat treatments during cutting or forming processes. Includes real-life case studies and failure analyses from the Villares Metals plant in Brazil.
Author:
Publisher:
ISBN:
Category : Electron metallography
Languages : en
Pages : 148
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Book Description
Author: Adamu Isa Obajimoh
Publisher:
ISBN:
Category : Austenite
Languages : en
Pages : 158
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Author:
Publisher:
ISBN:
Category : Electron metallography
Languages : en
Pages : 152
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Author: George Adam Roberts
Publisher: ASM International
ISBN: 1615032010
Category : House & Home
Languages : en
Pages : 365
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Book Description
Author:
Publisher:
ISBN:
Category : Mines and mineral resources
Languages : en
Pages : 690
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Book Description
