Production Gas Carburising

Production Gas Carburising

The Pergamon Materials Engineering Practice Series

1st Edition - January 1, 1985

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  • Authors: G. Parrish, G. S. Harper
  • eBook ISBN: 9781483152349

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Production Gas Carburising discusses the aspects of gas carburising for practical application. The book covers the fundamentals up to the advance concepts of gas carburising. The first few chapters tackle the basic aspects of gas carburising, including its history and fundamental principles. Later chapter covers the much more advance concepts. The topics this book covers include reasons for case carburising; hardness and hardenability; residual stress; carburising theory; control for the carburising process; quality control; and aspects of safety. Professionals whose work includes carburising, such as design engineers, will find this book of great interest.

Table of Contents

  • 1. Introduction

    2. Reasons for Case Carburising

    Bending Fatigue

    Contact Damage


    3. The Hardening of Steels

    Heat Treatment—Heating

    The Effect of Slow Cooling

    The Effect of Fast Cooling

    Hardness and the Carbon Gradient

    4. Hardness and Hardenability

    Core Hardness and Hardenability

    Material Selection—Jominy Data


    Significance of Core Strength

    Case Hardness and Hardenability

    5. Residual Stresses

    6. Design for Carburising

    Alternative Processes

    Design Considerations

    Material Considerations

    Process Considerations

    Process Specifications

    7. Carburising Theory

    Reactions within the Gas Phase

    Transport in the Boundary Layer

    Reactions at the Gas-Metal Interface

    Carburising in CH4:H2 Mixtures

    Carburising in CO:CO2 Mixtures

    Carburising in CO:H2:H2O Mixtures

    Carburising in CO:CO2:CH4:H2:H2O:N2 Mixtures



    8. Carburising Atmospheres: Their Production and Control


    Generator Practice

    Control of Endothermic Generators

    Nitrogen-Based Atmospheres


    Cost Comparison of Alternative Atmospheres

    Control of Carburising Atmospheres

    9. Control of the Carburising Process


    Determination of Required Carbon Profile

    Determination of Process Parameters

    Process Control

    Atmosphere Control

    10. Furnaces and Equipment

    Furnace Types

    Batch Furnaces

    Continuous Furnaces

    11. Pre-Carburising and Post-Carburising Heat Treatments

    Pre-Carburising Heat Treatments


    Pre-Carburising Quenching Treatment

    Post-Carburising Heat Treatments

    Austenitising for Hardening

    Practical Hardening Treatments

    Local Hardening

    Effect of Austenitising Temperature on Properties

    Effect of Quenching



    12. Quality Control

    Materials Acceptance

    In-process Testing

    Final Inspection

    13. Distortion

    Effect of Phase Changes on the Specific Volume of Steel

    Thermal Gradients

    Stress Relief

    Thermal Stresses

    Transformation Stresses

    Thermal Stresses and Transformation Stresses

    Uniformity of Heating and Cooling and Geometry of the Component

    Chemical Composition

    Effect of Other Production Variables

    Post-Hardening Corrective Treatments

    14. Microstructures in Case-Hardened Surfaces

    Internal Oxidation



    Retained Austenite


    15. Aspects of Safety


    Safety in the Heat Treatment Department—General

    First Aid


    Protective Clothing and Footwear

    Fire-Fighting Equipment

    Ventilation and Gas Detectors

    Parting Comment

    16. Concluding Remarks


    A. An Example of the Use of Fatigue Test Data

    B. Continuous-Cooling Transformation Diagrams

    C. Cooling Curves

    D. Theoretical Determination of Case Depth


Product details

  • No. of pages: 330
  • Language: English
  • Copyright: © Pergamon 1985
  • Published: January 1, 1985
  • Imprint: Pergamon
  • eBook ISBN: 9781483152349

About the Authors

G. Parrish

G. S. Harper

About the Editors

D. W. Hopkins

Affiliations and Expertise

University College of Swansea, UK

J. R. Barratt

T. Bell

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