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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
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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
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3
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......................................................................15
5. Al. Vencl, Al-Si ...................................17
6. C. SPÂNU, Cl. TELETIN, I.
CRUDUX-65......................................................................................24
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Al. Makedonski, I. Sovilj-Nikic .........................33
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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 � �
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175
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176
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I=
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,
300 µm
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182
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-
183
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÷ 200 µm
-
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-1:2001.
µm
-
184
Z [ \ ] ^ ] ^ _ ] ^ ` \ _ a b c d e f b g c h d e g f i j c k _
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120
130
140
150
160
170
180
190
200
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186
[1] Asthana Rajiv, Ashok Kumar, Narendra B. Dahotre, Coatings
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[2] Bell G. R., Surface coatings 3 - Gas-welded coatings.
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[6] Hou, R., D. M. Evans, J. McCure, A. C. Nunes, G. Garcia.
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