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Principles of the Austenitization of Steels - Charlie R. Brooks

Principles of the Austenitization of Steels

Hardcover Published: 30th November 1992
ISBN: 9781851667703
Number Of Pages: 218

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This book introduces the principles of the response of steels to the austenitizing process and is intended to act as a source book for information and review purposes for metallurgists, metallurgical engineers and other materials scientists.

Introductionp. 1
The Process of Crystallization and Chemical Segregationp. 2
The Formation of a Crystal from a Liquidp. 2
As-Cast Grain Shape and Sizep. 4
Gross Chemical Segregation in Ingotsp. 7
Dendritic Segregation (Coring)p. 10
The Dendritic Structure and Chemical Segregation in Cast Steel Ingotsp. 19
Dendritic Structure in Steel Ingotsp. 19
Gross Chemical Segregation in Steel Ingotsp. 21
Dendritic Segregationp. 23
Calculation of Austenitizing Temperature and Time for Chemical Homogenizationp. 28
Removing Gross Segregationp. 28
Removing Dendritic Segregationp. 29
Effect of Homogenization on Removing Dendritic Segregationp. 33
Banding in Steelsp. 40
Review of the Grain Growth Processp. 51
The Role of Impurities in Affecting Grain Growthp. 59
The Effect of Solutesp. 59
The Effect of Insoluble Particlesp. 59
Particle Coarseningp. 65
Grain Growth in Austenitep. 73
Grain Growth in Pure Ironp. 73
Grain Growth in Steelsp. 74
Austenitization of Steelsp. 81
The Formation of Austenite in Pure Ironp. 82
The Formation of Austenite in Steelsp. 82
The Formation of Austenite from Pearlitep. 85
The Initial Austenite Grain Sizep. 92
The Homogenization of Austenitep. 94
The Formation of Austenite from Structures of Primary Ferrite and Pearlite and of Primary Iron Carbide and Pearlitep. 101
The Formation of Austenite from a Structure of Spheroidized Carbides in Ferritep. 106
The Formation of Austenite from Martensitep. 114
Examination of Some Models for Carbide Dissolution in Austenitep. 114
Summarizing Commentsp. 129
Heating to the Austenite Regionp. 131
Heat Transfer Relationsp. 131
Some Heating Rate Datap. 137
Closing Commentsp. 142
Austenitizing Treatments to Remove Chemical Segregation, either Gross or Dendritic, Developed during Solidificationp. 142
Austenitizing as the First Step in Heat Treatmentp. 143
A Comment on Referencesp. 144
Appendix 1 The Johnson-Mehl Equationp. 145
Appendix 2 Nucleation and Growth Theoryp. 150
Appendix 3 Derivation of Number of Particles Intersected by a Surfacep. 158
Appendix 4 Tables for Calculating the Temperature Distribution in Steels as a Function of Time during Heating and Coolingp. 160
Appendix 5 Temperature Conversionsp. 179
Appendix 6 Metric Conversion Factorsp. 184
Appendix 7 Common Units for Converting from the English to the Metric (SI) Systemp. 186
Appendix 8 The Iron-Carbon Equilibrium Diagramp. 189
Appendix 9 Approximate Equivalent Hardness Numbers and Tensile Strengths for Rockwell C and Rockwell B Hardness Numbers for Steelp. 190
Appendix 10 The Relationship between the ASTM Grain Size and the Average 'Diameter' of the Grainp. 193
Appendix 11 Methods to Reveal Austenite Grain Sizep. 195
Appendix 12 A Comment on Magnification Markersp. 196
Appendix 13 A Glossary of Termsp. 198
Indexp. 211
Table of Contents provided by Blackwell. All Rights Reserved.

ISBN: 9781851667703
ISBN-10: 1851667709
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 218
Published: 30th November 1992
Publisher: Kluwer Academic Publishers Group
Country of Publication: NL
Dimensions (cm): 23.5 x 15.5  x 1.91
Weight (kg): 1.13