SOCIETY OF BULGARIAN TRIBOLOGISTS
TECHNICAL UNIVERSITY OF SOFIA
8-
TRIBOLOGICAL JOURNAL BULTRIB
Papers from the 8 th National Conference with International Participation
BULTRIB '11
October 28th
, 2011, Sofia
II, 02 (02), 2012 Volume II, Number 02 (02), 2012
2
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Tribological journal BULTRIB is published by The resources of a project funded by the grant for "Days of Science of TU - Sofia - 2011."
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BULTRIB '11,
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2012
ISSN: 1313-9878
3
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� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �................................................................07
2. - � � � � � � � � � � - � � - � � � � � � � � � � � � � � 3.
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5. Al. Vencl, Al-Si ...................................17
6. C. SPÂNU, Cl. TELETIN, I. CRUDUX-65......................................................................................24
7. B. Sovilj, M. Kandeva, G. Nikolcheva, J. Javorova, I. Kolev, Al. Makedonski, I. Sovilj-Nikic .........................33
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� � � � . #
FE2O3-TIO2 -......................................................................43
9. / � 0 � � � � � � �
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............................................49 10.
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CU-CO ....................................................56
11. � � " � � � � � � � � # ( � � " � � � # � � " � � � � � a, ........................61
12. / � " � � � � 3 � � � # ( � � � � � � # � � � � � � � � #
...............................................................................................73 13.
/ � " � � � � 3 � � � # 1 � " � � � 4 % � � � # � � " � � � � � � #
- .......................................................80
14. +
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..............................................105
17. � � " * � - � � � # ( � � � � � � # � � " � � � � � � #
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..............................................133
4
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..............................................................141
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...........................................149
22. 6 � � � � � � # + � � � - � � � � � # 2 � 6 � � � � # ! � ! � � � 7 � # 8 � � � � � , ST 304...........................................................................................................157
23. 9 � � � - � � � � � # � � � � � � # 9 � 9 � � � � � � #
....................176
24. 2 � � � 4 % � � # � � " � � � � � � #
HVOF-..............................................................................................187
25. � � " � � � � � � # 2 � � � 4 % � � # + � � � - � � � � � #
(HVOF- )......................198
26. ( � � . � � � � � � # � � " � � � � � � # ) � + � � � � �
.............213 27.
+ � � � � # � -.......................................................................219
28. + � � � � #
� � " � � � � � � #
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29. � � � � - � � � � # S700MC .....................................................................242
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................................................................254
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....................................................258 33.
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........................................................................................................287
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35. � �
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176
Tribological Journal BULTRIB, Papers from Conference BULTRIB '11, October 28th, 2011, Sofia
Compiled by: Assoc. Prof. Dr. Mara Kandeva, Society of Bulgarian Tribologists Published by: Publ. House Technical University - Sofia
1 2 3
1 � � � � � � � � � � � � � � � � � � � - � � � � r_dimitrova@ tu-sofia.bg 2 � � � � � � � � � � � � � � � � � � � - � � � � � [email protected]
3 � � � � � � � � � � � � � � � � � � �- � � � � rafo@ tu-sofia.bg
CREATION OF INTERNAL ALLOYED LAYER WITHIN A LOW
CARBON STEEL MATRIX BY PLASMA ARC SURFACING PROCESS
Rayna Dimitrova1 , Manahil Tongov 2 , Rangel Rangelov3
1 Technical University, Sofia, Bulgaria; E-mail: r_dimitrova@ tu-sofia.bg 2 Technical University, Sofia, Bulgaria; E-mail: [email protected]
3Technical University, Sofia, Bulgaria; E-mail: rafo@ tu-sofia.bg
Abstract: In the present work are investigated the creation
possibilities of internal alloyed layer with high carbon contend and
decreased hardness within a low carbon matrix using a method of
preliminary coated graphite based alloying material by the plasma
arc surfacing process with solid wire electrode. There are obtained
experimental results after metalographic analysis and
microhardness profile within the surfaced metal. The investigation
is related to the topic and is funded by the Ministry of Education
and Science according to the contract � � � �
-01/3 of the Technical
University � Sofia entitled Development of University Research Complex for Innovations and Knowledge Transfer in the area of
micro/nano technologies and materials, energy efficiency and
virtual engineering � �
175
-
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-
- -
-
-
-
176
- -
2.
2.1
.
-
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-80 .16 mm SiO2 98%.
�
177
I=
80 [A], VH = 30 [mm/min], [mm],
-
Olympus
2% HN 3
-
178
� � � � � � � ! " # $ ! % $ % ! & ' ( " ) & $ & ) & # * + & ' , ' , ) - ) & ) & ' & ! - ) � , . - $ & + #) � # " ' / 0 + - ! " 1 ) & $ & . & $ ! � 2 & 3 - ( ) & ) - # - ) + - 0 � ! & 4 . & $ - ! � & +
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D
- < > D B 6 E D @ 6 D F G A H ; 6 I > B C > 9 J 6 K G G A H ; 6 I > L C : @ 9 J
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D
- < > D B 6 E D @ 6 D F G G A H ; 6 I > B C > 9 J 6 K
G G G A H ; 6 I > L C : @ 9 J
179
M N O P Q � � ! " # $ ! % $ % ! & ' ( " ) & $ & ) & ) & ' & ! - ) � , . - $ & + 3 - ( ) & ) - # - ) + - 0 � ! & 4 ' / ! R %) � # " ' / 0 + - ! " 1 ) & $ & . & $ ! � 2 & . & $ - ! � & +
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = @ = > = 8 C > = @ D
- < > D B 6 E D @ 6 D F G A H ; 6 I > B C > 9 J 6 K G G A H ; 6 I > L C : @ 9 J
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D-
< > D B 6 E D @ 6 D F G G A H ; 6 I > B C > 9 J 6 K
G G G A H ; 6 I > L C : @ 9 J
180
: 1.
� � � � S � � ! " # $ ! % $ % ! & ' ( " ) & $ & ) & # * + & ' , ' , ) - ) & ) & ' & ! - ) � , . - $ & + #) � # " ' / 0 + - ! " 1 ) & $ & . & $ ! � 2 & # * ! - 1 ' & ! � $ - + ) " ) & ) - # - ) + - 0 � ! & 4 . & $ - ! � & + " $ 0 ! & T � $
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D
- < > D B 6 E D @ 6 D F G A H ; 6 I > B C > 9 J 6 K G G A H ; 6 I > L C : @ 9 J
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D-
< > D B 6 E D @ 6 D F G G A H ; 6 I > B C > 9 J 6 K
G G G A H ; 6 I > L C : @ 9 J
181
� � � � U � � ! " # $ ! % $ % ! & ' ( " ) & $ & ) & ) & ' & ! - ) � , . - $ & + # * ! - 1 ' & ! � $ - + ) " ) & ) - # - ) + - 0 � ! & 4# + " V " $ 0 ! & T � $
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = @ = > = 8 C > = @ D
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G G G A H ; 6 I > L C : @ 9 J
,
300 µm
-
20-
182
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5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D
- < > D B 6 E D @ 6 D F G A H ; 6 I > B C > 9 J 6 K G G A H ; 6 I > L C : @ 9 J
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D
- < > D B 6 E D @ 6 D F G G A H ; 6 I > B C > 9 J 6 K
G G G A H ; 6 I > L C : @ 9 J
183
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- < > D B 6 E D @ 6 D F G A H ; 6 I > B C > 9 J 6 K G G A H ; 6 I > L C : @ 9 J
5 6 7 8 9 : ; 8 < 7 ; < 8 = > ? 9 @ = ; = @ = : A B = > C > = @ D-
< > D B 6 E D @ 6 D F G G A H ; 6 I > B C > 9 J 6 K
G G G A H ; 6
I > L C : @ 9 J
÷ 200 µm
-
30-
-1:2001.
µm
184
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110
120
130
140
150
160
170
180
190
200
210
-200 -100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300m n o p q m r s p nt uvwx yz{w |x} y HV 0.2
HV 0,2 /~
/
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-
185
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186
[1] Asthana Rajiv, Ashok Kumar, Narendra B. Dahotre, Coatings and Surface
Engineering. Materials Processing and Manufacturing Science, 2006
[2] Bell G. R., Surface coatings 3 - Gas-welded coatings. Tribology, Volume 5,
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[3] Fischer A., Well-founded selection of materials for improved wear
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[5] Henderson J. L., J. H. Bulloch, The abrasive wear resistance of the
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[6] Hou, R., D. M. Evans, J. McCure, A. C. Nunes, G. Garcia. 1996. Shielding
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