Multi-component boron coatings on low carbon steel AISI 1018

More documents

Recommendations

Info

2 characteristics and properties of multi-<strong>component</strong> <strong>boron</strong> <strong>coatings</strong> are detected and compared for desiring the specific application of each multi-<strong>component</strong> boride coating. 1.2 Background Information Boronizing and metallizing are a well-known thermo-chemical surface hardening for many decades. Boronizing is a process that <strong>boron</strong> atoms are diffused into a metal substrate and form a hard metallic boride layer on the metal surface. The treatment can be achieved on most ferrous materials (iron steels and alloys) and some nonferrous materials (nickel and nickel-based alloys, titanium and titanium alloys and refractory metals and alloys). On the other hand, metallizing involves the diffusion of metallic elements into the surface of <strong>component</strong>s. One or several metallic elements such as aluminum, chromium, nickel, silicon and vanadium can be diffused into the metal substrate, then either substitutional solid solution layers or intermetallic layers are formed. In case the metal substrate has carbon content at least 0.45%, a carbide layer can be formed. Boronizing provides high wear resistance, corrosion resistance, high temperature oxidation resistance and 3-10 times increasing service life [1]. One of <strong>boron</strong>izing advantages is to fill up the technology gap between conventional surface treatment and advanced surface treatment such as chemical/physical vapor deposition with low cost procedure, high quality products and similar service life improvement [2]. Diffusion metallizing is unlikely to provide a variety of properties as <strong>boron</strong>izing does. Metallizing gives an intentional surface treatment for a special case property; for example aluminizing improves oxidation and corrosion resistance, chromizing improves wear and corrosion resistance and siliconizing improves corrosion resistance in acid [3]. Therefore, the formation of multi-<strong>component</strong> boride <strong>coatings</strong> as borochromizing, borovadanizing or
3 borosiliconizing using <strong>boron</strong>izing and metalizing techniques will enhance the boride coating properties.
Page 1 and 2: Copyright Warning & Restrictions Th
Page 3 and 4: ABSTRACT MULTI-COMPONENT BORON COAT
Page 5 and 6: MULTI-COMPONENT BORON COATINGS ON L
Page 7 and 8: APPROVAL PAGE MULTI-COMPONENT BORON
Page 9 and 10: Roumiana S. Petrova, Naruemon Suwat
Page 11 and 12: vii
Page 13 and 14: TABLE OF CONTENTS Chapter Page 1 IN
Page 15 and 16: TABLE OF CONTENTS (Continued) Chapt
Page 17 and 18: TABLE OF CONTENTS (Continued) Chapt
Page 19 and 20: LIST OF TABLES Table Page 2.1 The M
Page 21 and 22: LIST OF FIGURES (Continued) Figure
Page 27: CHAPTER 1 INTRODUCTION 1.1 Objectiv
Page 31 and 32: 5 During boronizin
Page 33 and 34: 7 the FeB/Fe2B interface. Such crac
Page 35 and 36: 9 nickel metal do not show the stro
Page 37 and 38: 11 2.3.2 Paste Boronizing The paste
Page 39 and 40: 13 2.3.5 Plasma Boronizing The plas
Page 41 and 42: 15 Table 2.2 The Multi</str
Page 43 and 44: 17 Proportion of alloying elements,
Page 45 and 46: 19 when boronizing
Page 47 and 48: 21 in the process of powder pack <s
Page 49 and 50: 23 Torun [46] studied the b
Page 51 and 52: 25 10 3 Figure 2.4 The effect of st
Page 53 and 54: 27 • The surface hardness of <str
Page 55 and 56: 29 Figure 2.7 The hardness value fo
Page 57 and 58: 31 2.7 Research and Development on
Page 59 and 60: 33 Instead of toxic borane and <str
Page 61 and 62: 35 Tsipas et al. [76] utilized the
Page 63 and 64: 37 Buijnsters et al. [85] investiga
Page 65 and 66: 39 in terms of thickness and microh
Page 67 and 68: 41 these boride layers reduced the
Page 69 and 70: 43 The decorative boride co
Page 71 and 72: CHAPTER 3 MULTI-COMPONENT BORONIZIN
Page 73 and 74: 47 3.2.2 Procedures of Boronizing H
Page 75 and 76: 49 Specimen Sample Preparation proc
Page 77 and 78: 51 View direction through a microsc
Page 79 and 80:
53 thicknesses was shown as a histo
Page 81 and 82:
55 the test force, gf the length of
Page 83 and 84:
57 3.3.4 Corrosion Resistance Testi
Page 85 and 86:
59 2. Quantitative Phase Analysis Q
Page 87 and 88:
61 B. The variance of the crystalli
Page 89 and 90:
63 SDI Application software was use
Page 91 and 92:
65 The Intensity /k can be refined
Page 93 and 94:
67 The profile value: The weighted
Page 95 and 96:
69 In Figure 4.1 b), the coating im
Page 97 and 98:
71 4.1.2 Phase Identification The X
Page 99 and 100:
73 Table 4.1 The Lattice Parameters
Page 101 and 102:
75 4.1.4 Corrosion Resistance The c
Page 103 and 104:
77 4.2 Boron- Chromium - Iron (B -
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
83 4.2.4 Mierohardness In B-Cr-Fe s
Page 111 and 112:
85 4.2.6 Oxidation Resistance The h
Page 113 and 114:
Figure 4.13 The morphology images o
Page 115 and 116:
Figure 4.14 The XRD pattern (refine
Page 117 and 118:
91 Figure 4.15 The microdiffraction
Page 119 and 120:
93 4.3.5 Corrosion Resistance The c
Page 121 and 122:
95 4.4 Boron — Tungsten - Iron (B
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Figure 4.23 The mierofluoreseence o
Page 129 and 130:
103 4.4.5 Corrosion Resistance The
Page 131 and 132:
105 4.5 Boron — Niobium - Iron (B
Page 133 and 134:
107 4.5.2 Phase Identification The
Page 135 and 136:
109 Table 4.5 The Lattice Parameter
Page 137 and 138:
M 11 4.5.4 Microhardness In B-Nb-Fe
Page 139 and 140:
113 4.5.6 Oxidation Resistance The
Page 141 and 142:
Figure 4.34 The morphology images o
Page 143 and 144:
Figure 4.35 The XRD pattern (refine
Page 145 and 146:
1119 Figure 4.36 The microdiffracti
Page 147 and 148:
Page 149 and 150:
123 4.7 Boron — Titanium - Iron (
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
131 4.8 Boron — Zirconium - Iron
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
139 4.9 Boron — Hafnium - Iron (B
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
g 145 4.9.5 Oxidation Resistance Th
Page 173 and 174:
147 5.1.1 Microstructure of B-Cr-Fe
Page 175 and 176:
149 As mention above, the coating t
Page 177 and 178:
151 Atomic size: 1.241A Crystal str
Page 179 and 180:
153 Coating thickne, (Mean): 84.24
Page 181 and 182:
155 Due to the atomic size, substit
Page 183 and 184:
157 5.3 Microhardness In bo
Page 185 and 186:
159 5.4 Corrosion Resistance In thi
Page 187 and 188:
161 5.5 Oxidation Resistance In one
Page 189 and 190:
Figure 5.7 The comparison of oxidat
Page 191 and 192:
165 For transition metals Group IVB
Page 193 and 194:
APPENDIX A PHASE DIAGRAMS The binar
Page 195 and 196:
Figure A.3 Phase diagrams in B-Mo-F
Page 197 and 198:
Figure A.5 Phase diagrams in B-Nb-F
Page 199 and 200:
Figure A.7 Phase diagrams in B-Ti-F
Page 201 and 202:
Figure A.9 Phase diagrams in B-Hf-F
Page 203 and 204:
177 Name and formula Reference code
Page 205 and 206:
Page 207 and 208:
Name and formula Reference code: 04
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
195 15. Selçuka, B., Tpekb, R., Ka
Page 223 and 224:
197 41. Ueda, N., Mizukoshi, T., De
Page 225 and 226:
199 67. Davis, J. A., Wilbur, P. J.
Page 227 and 228:
201 90. Uzunov, N., Ivanov, R. (200
Page 229:
203 114. Jayaraman, S., Gerbi, J. E
show all

Multi-component boron coatings on low carbon steel AISI 1018

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?