Chapter 6 Precision manufacturing through cryogenic treatment: a case study
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M. Arockia Jaswin
Abstract
Cryogenic treatment is an add-on process to the conventional heat treatment process carried out to enhance the behavior of materials before including them into service. The precision in the machine parts will affect the quality of components produced and if any failure occurs in the precision components, it leads to increase in down time of the machines and production losses. The dimensional stability of the precision components plays a vital role in manufacturing more accurate and reliable products. Cryogenic treatment has the potential to enhance the performance of the material and improve the reliability of the system. Cryogenic treatment process is a onetime process to enhance the performance of the material during service. The materials are slowly cooled to −196 °C and soaked for around 24 h and treated at room temperature followed by a low-temperature tempering. It is reported that the cryogenic treatment has the potential to enhance the strength and dimensional stability of the treated material by transforming the retained austenite to martensite and ultrafine carbide precipitation. The dimensional stability of the cryogenic treated materials shows lower coefficient of linear thermal expansion by increasing the precision of the component in service. This chapter will discuss about the dimensional stability of the cryogenic treated materials for precise applications like IC engine valve and valve seat, bearings, plunger of diesel pumps, piston rings, and related precision components. The step-by-step procedure to carry out the cryogenic treatment process to get optimum dimensional stability of the materials will be discussed in detail. Also, the important properties associated with the machine components for ensuring precision in its service will be discussed.
Abstract
Cryogenic treatment is an add-on process to the conventional heat treatment process carried out to enhance the behavior of materials before including them into service. The precision in the machine parts will affect the quality of components produced and if any failure occurs in the precision components, it leads to increase in down time of the machines and production losses. The dimensional stability of the precision components plays a vital role in manufacturing more accurate and reliable products. Cryogenic treatment has the potential to enhance the performance of the material and improve the reliability of the system. Cryogenic treatment process is a onetime process to enhance the performance of the material during service. The materials are slowly cooled to −196 °C and soaked for around 24 h and treated at room temperature followed by a low-temperature tempering. It is reported that the cryogenic treatment has the potential to enhance the strength and dimensional stability of the treated material by transforming the retained austenite to martensite and ultrafine carbide precipitation. The dimensional stability of the cryogenic treated materials shows lower coefficient of linear thermal expansion by increasing the precision of the component in service. This chapter will discuss about the dimensional stability of the cryogenic treated materials for precise applications like IC engine valve and valve seat, bearings, plunger of diesel pumps, piston rings, and related precision components. The step-by-step procedure to carry out the cryogenic treatment process to get optimum dimensional stability of the materials will be discussed in detail. Also, the important properties associated with the machine components for ensuring precision in its service will be discussed.
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- Chapter 1 Introduction to precision manufacturing for micro- and nanofabrication 1
- Chapter 2 Principle of precision engineering 25
- Chapter 3 Microfabrication: techniques and technology 47
- Chapter 4 Materials for micro- and nanofabrication 77
- Chapter 5 Transition metal oxide semiconductor materials: properties and applications 101
- Chapter 6 Precision manufacturing through cryogenic treatment: a case study 133
- Chapter 7 Ferromagnetic composite nanofiber for low magnetic field sensing: a case study 149
- Chapter 8 Environmental impact, sustainability, and future direction 163
- Index 173
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- Chapter 1 Introduction to precision manufacturing for micro- and nanofabrication 1
- Chapter 2 Principle of precision engineering 25
- Chapter 3 Microfabrication: techniques and technology 47
- Chapter 4 Materials for micro- and nanofabrication 77
- Chapter 5 Transition metal oxide semiconductor materials: properties and applications 101
- Chapter 6 Precision manufacturing through cryogenic treatment: a case study 133
- Chapter 7 Ferromagnetic composite nanofiber for low magnetic field sensing: a case study 149
- Chapter 8 Environmental impact, sustainability, and future direction 163
- Index 173
