ebook ebooks e-book e-books downloaden bei MyEbooks.ch downloaden

Magnesium Injection Molding

:	Frank Czerwinski
:	Magnesium Injection Molding
:	Springer-Verlag
:	9780387725284
:	1
:	CHF 132.90
:

:	Maschinenbau, Fertigungstechnik
:	English

:	599
:	Wasserzeichen
:	PC/MAC/eReader/Tablet
:	PDF

The objective of this book, being the first one on magnesium injection molding, is to treat both the scientific background and the technological aspects as they are understood at present. All aspects of material development, manufacturing and engineering are covered. The book provides a single source of information covering the interdisciplinary field of net shape forming of magnesium alloys. It reflects a unique blend of science and industrial practice.

Dr. Czerwinski did 2 years of postdoctoral study at McGill University and 2 years at McMaster University. He has a PhD in Metallurgical Engineering from McGill University, and a PhD in Materials Engineering from the University of Mining and Metallurgy, Cracow, Poland.

He was a University Professor of Materials and Metallurgical Engineering and a faculty member for 19 years. Dr. Czerwinski has been a manager and principal scientist of numerous research projects sponsored by the National Research Council of Canada, universities and industry. At present, he is a Chief Metallurgist involved in a development of the injection molding machinery and researching metallurgical aspects of semisolid injection molding of metallic alloys.

He is the author of a monograph in surface engineering; and the author and co-author of over 140 reserch papers in peer-review scientific journals and conference proceedings.

Dr.Czerwin ki is affiliated with: Professional Engineergs of Ontario, ASM International and The Minerals, Metals and Materials Society.

	Preface	6
	Biography	8
	Contents	9
	Magnesium and Its Alloys	21
	1.1 Introduction	21
	1.2 Market Development	21
	1.3 Production Techniques of Pure Metal	29
	1.4 Fundamentals of Alloying	38
	1.5 Alloys	49
	1.6 Selected Properties of Alloys	60
	1.7 Processing Techniques	72
	1.8 Heat Treatment	81
	1.9 Surface Protection	85
	1.10 Application Markets	93
	1.11 Summary	96
	References	96
	Semisolid Processing—Origin of Magnesium Molding	100
	2.1 Introduction	100
	2.2 Origin of the Concept	100
	2.3 Rheological Behavior of Semisolid Slurries	102
	2.4 Viscosity Measurements of Metallic Slurries	115
	2.5 Rheological Measurements for Semisolid Magnesium Alloys	122
	2.6 Techniques of Generating Globular Structures	126
	2.7 Benefits of Semisolid Processing	134
	2.8 Suitability Criteria of Alloys for Semisolid Processing	138
	2.9 Industrial Implementations of Major Semisolid Concepts	143
	2.10 Origin and Progress of Magnesium Molding	149
	2.11 Present Applications and Future Opportunities for Magnesium Molding	154
	2.12 Summary	163
	References	164
	Basic and Auxiliary Hardware	167
	3.1 Introduction	167
	3.2 Machine	167
	3.3 Slurry Distribution Systems	189
	3.4 Mold	192
	3.5 Summary	198
	References	198
	Thermal and Corrosive Aspects of Processing Molten Magnesium	199
	4.1 Introduction	199
	4.2 High Temperature Effect of Molten Magnesium Alloys on Other Materials	200
	4.3 Corrosive Behavior of Molten Magnesium Alloys	217
	4.4 Summary	230
	References	232
	Process Theory and Practice	233
	5.1 Introduction	233
	5.2 Key Processing Parameters	233
	5.3 Functions of the Injection Screw	241
	5.4 Function of the Non-Return Valve	256
	5.5 Nozzle Plug—Principles of Thermal Gating	260
	5.6 Mold Processing	269
	5.7 Common Defects	282
	5.8 Product Quality Control	295
	5.9 Summary	300
	References	301
	Feedstock Selection	303
	6.1 Introduction	303
	6.2 Techniques of Particulates Manufacturing	303
	6.3 Characterization of Particulates Manufactured by Mechanical Fragmentation	308
	6.4 Characterization of Rapidly Solidified Granules	315
	6.5 External Characteristics Affecting Injection Molding Applications	326
	6.6 Global Manufacturing Market of Magnesium Particulates	328
	6.7 Summary	330
	References	330
	Oxidation Behavior of the Feedstock	332
	7.1 Introduction	332
	7.2 Oxidation Kinetics	332
	7.3 Oxidation Surfaces	336
	7.4 Oxide Growth Morphologies	337
	7.5 Internal Structure of Oxide Layers	341
	7.6 Oxide Phase Composition	343
	7.7 Influence of Chemical Composition on Magnesium Oxidation	347
	7.8 Evaporation Characteristics	349
	7.9 Oxidation Mechanism	351
	7.10 Ignition Behavior	355
	7.11 Alloy Protection Against Oxidation and Ignition	356
	7.12 Implications for Injection Molding Practice	363
	7.13 Examples of Alloy Degradation from Injection Molding Practice	364
	7.14 Summary	369
	References	369
	Melting Behavior of the Feedstock	371
	8.1 Introduction	371
	8.2 Factors Affecting Feedstock’s Thermal Instability	371
	8.3 Solid-State Transformation During Heating	380
	8.4 Microstructure Evolution During Feedstock Melting	390
	8.5 Melting of As-Cast Ingot	408
	8.6 Phenomena During Heating of Rapidly Solidified Granules	410
	8.7 Microstructure Correlation Between the Solid and Semisolid State	415
	8.8 Summary	419
	References	420
	Alloy Transformations During Molding	422
	9.1 Introduction	422
	9.2 Factors Controlling Microstructure Evolution	422
	9.3 Solid-State Transformations During Initial Conveyance	424
	9.4 Semisolid-State Transformations Within the Machine Barrel	427
	9.5 Transformations Associated with the Seal Plug	435
	9.6 Theories of the Formation of Globular Structures During Melting and Solidification	440
	9.7 Evolution of the Primary Solid Phase During Molding	444