PREFACE ......................................................... 9
Chapter 1 COMPOSITION, MICROSTRUCTURE AND MECHANICAL
CHARACTERISTICS OF SPHEROIDAL GRAPHITE CAST IRONS WITH TIN ..... 13
1.1 General characteristics and applications of spheroidal
graphite cast irons ....................................... 13
1.2 Composition and microstructure of spheroidal graphite
cast irons with tin ....................................... 20
1.3 Mechanical characteristics of spheroidal graphite cast
irons with tin ............................................ 25
Conclusion ..................................................... 28
References to Chapter 1 ........................................ 29
Chapter 2 DRY FRICTION ........................................ 31
2.1 Basic ideas on the contact interaction under dry
friction conditions ....................................... 31
2.2 Contact interaction in preliminary displacements .......... 35
2.2.1 Device and procedure ............................... 38
2.2.2 Experimental results and discussion ................ 40
2.2.3 Regressive model of static friction force .......... 45
2.2.4 Law for the static coefficient of friction of the
tin content ........................................ 46
2.3 Kinetic friction .......................................... 50
2.3.1 Device and procedure ............................... 50
2.3.2 Experimental results and discussion ................ 50
Conclusion ................................................ 51
References to Chapter 2 ................................... 52
Chapter 3 ABRASIVE WEAR ....................................... 54
3.1 Basic ideas on abrasive wear .............................. 54
3.2 Abrasive wear dynamics of spheroidal graphite cast iron
microalloyed by tin ....................................... 58
3.2.1 Device and procedure ............................... 58
3.2.2 Experimental results ............................... 62
3.2.3 Results discussion ................................. 66
3.3 Abrasive wear of spheroidal graphite cast iron
microalloyed by tin under extreme friction conditions ..... 67
3.3.1 Abrasive wear at high contact pressure ............. 67
3.3.1.1 Device and procedure ........................... 67
3.3.1.2 Experimental results ........................... 70
3.3.1.3 Results and discussion ......................... 74
3.3.1.4 Regression mathematical model of abrasive wear
rate ........................................... 74
3.3.2 Vibro-abrasive wear of spheroidal graphite cast
iron microalloyed by tin ........................... 78
3.3.2.1 Device and procedure ........................... 79
3.3.2.2 Experimental results ........................... 81
3.3.2.3 Results discussion ............................. 86
Conclusion ................................................ 89
References to Chapter 3 ................................... 90
Chapter 4 EROSION WEAR ........................................ 92
4.1 Contact interactions at solid surfaces erosion ............ 92
4.2 Erosion of spheroidal graphite cast irons at the
interaction with abrasive air jet ......................... 98
4.2.1 Theory of contact interaction at erosion ........... 99
4.2.2 Device and procedure .............................. 101
4.2.3 Experimental results .............................. 104
4.2.4 Analysis of experimental results .................. 105
4.3 Erosion of spheroidal graphite cast irons at the
interaction with water-abrasive jet ...................... 106
4.3.1 Device and procedure .............................. 106
4.3.2 Experimental results .............................. 108
4.3.3 Analysis of experimental results .................. 110
Conclusion ............................................... 110
References to Chapter 4 .................................. 112
Chapter 5 SELECTIVE TRANSFER OF MATERIALS IN TRIBOSYSTEMS .... 113
5.1 Background: roots, mechanisms and relationships of the
selective transfer by friction ........................... 113
5.2 Wear of spheroidal graphite cast iron microalloyed by
tin, under conditions of lubricant media with
metalplating composite additive Valena ................... 123
5.2.1 Materials ......................................... 123
5.2.2 Device and procedure for the study ................ 125
5.2.3 Experimental results and analysis ................. 126
5.3 Wear at contact interaction between different materials
with Valena .............................................. 128
5.3.1 Materials ......................................... 129
5.3.2 Experimental results and analysis ................. 130
5.3.3 Selective transfer in friction regime at
reversible motion ................................. 140
5.4 Friction coefficient in rolling and plain bearings at
lubrication with Valena additive ......................... 143
5.4.1 Influence of Valena additive on friction in
rolling bearings .................................. 143
5.4.1.1 Device and procedure .......................... 143
5.4.1.2 Study of friction in bearing unit with motor
oil M63/14 without and with Valena additive ... 145
5.4.1.3 Study of friction in bearing unit with
transmission oil TM-5-18 without and with
additive Valena ............................... 147
5.4.2 Influence of Valena additive on friction in
"shaft-bushing" contact system .................... 149
5.4.2.1 Device and procedure .......................... 149
5.4.2.2 Experimental results and analysis ............. 153
Conclusion .................................................... 157
References to Chapter 5 ....................................... 158
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