Plasma Nitriding of Steels (eBook)

Hossein Aghajani is an Assistant Professor at the Department of Materials Engineering- University of Tabriz, Iran. He holds three Iranian patents in active screen plasma nitriding and several research papers in the field.Sahand Behrangi holds a master degree from the University of Tabriz, Iran. His research interests are surface engineering and protection of ferrous and nonferrous alloys.

Preface 6
Contents 7
1 Introduction 10
1.1 Surface Layers Formed by Nitriding 10
1.1.1 Compound (White) Layer 10
1.1.2 Diffusion Layer 11
1.2 Methods of Nitriding 11
1.2.1 Liquid Nitriding 11
1.2.2 Gas Nitriding 12
1.2.2.1 Single-Stage Method 12
1.2.2.2 Two-Stage Method 12
1.2.3 Plasma Nitriding 12
1.2.3.1 Mechanism of Plasma Nitriding 13
1.2.3.2 Parameters 14
Gas Mixture 15
Temperature 15
1.2.3.3 Parts of a Plasma Nitriding System 15
1.2.3.4 Advantages and Disadvantages of Plasma Nitriding 16
References 17
2 Conventional DC Plasma Nitriding 18
2.1 Microstructure 18
2.1.1 Austenitic Stainless Steels 18
2.1.2 Martensitic Stainless Steels 28
2.1.3 Precipitation Hardening Stainless Steels 32
2.1.4 Tool Steels 37
2.1.5 Structural and Constructional Steels 39
2.2 Mechanical Properties 45
2.2.1 Austenitic Stainless Steels 45
2.2.2 Martensitic Stainless Steels 52
2.2.3 Precipitation Hardening Stainless Steels 54
2.2.4 Tool Steels 57
2.2.5 Structural and Constructional Steels 60
2.3 Corrosion Behavior 68
2.3.1 Austenitic Stainless Steels 68
2.3.2 Martensitic Stainless Steels 69
2.3.3 Precipitation Hardening Stainless Steels 72
2.3.4 Tool Steels 73
2.3.5 Structural and Constructional Steels 74
References 76
3 Pulsed DC Glow Discharge Plasma Nitriding 79
3.1 Microstructure 79
3.1.1 Austenitic Stainless Steels 79
3.1.2 Martensitic Stainless Steel 84
3.1.3 Precipitation Hardening Stainless Steels 86
3.1.4 Ferritic Stainless Steels 86
3.1.5 Tool Steels 90
3.1.6 Constructional and Structural Steels 96
3.2 Mechanical Properties 103
3.2.1 Austenitic Stainless Steels 103
3.2.2 Martensitic Stainless Steels 108
3.2.3 Ferritic Stainless Steels 114
3.2.4 Tool Steels 114
3.2.5 Constructional and Structural Steels 117
3.3 Corrosion Properties 120
3.3.1 Austenitic Stainless Steel 120
3.3.2 Martensitic Stainless Steel 123
3.3.3 Precipitation Hardening Stainless Steels 127
3.3.4 Tool Steels 127
3.3.5 Constructional and Structural Steels 128
References 131
4 Active Screen Plasma Nitriding 134
4.1 Microstructure 135
4.1.1 Austenitic Stainless Steels 135
4.1.2 Structural and Constructional Steels 141
4.2 Mechanical Properties 152
4.2.1 Austenitic Stainless Steels 152
4.2.2 Structural and Constructional Steels 158
4.3 Corrosion Properties 161
4.3.1 Austenitic Stainless Steels 161
4.3.2 Structural and Constructional Steels 163
References 165
5 Radiofrequency (RF) Plasma Nitriding 167
5.1 Microstructure 168
5.1.1 Austenitic Stainless Steels 168
5.1.2 Martensitic Stainless Steel 173
5.1.3 Tool Steels 174
5.1.4 Constructional and Structural Steels 176
5.2 Mechanical Properties 178
5.3 Corrosion Behavior 182
References 186
6 Other Methods 188
6.1 Microwave Plasma Nitriding 188
6.2 Electron Beam Excited Plasma Nitriding 191
6.3 Plasma Radical Nitriding 191
References 192