|
|
|||||||||||||||||
|
Costul unui
abonament: 540 RON |
Nr.12 decembrie 2007 |
Copyright ©
2007 Revista METALURGIA
Nici un
material din această revistă nu poate fi reprodus, difuzat sau
folosit ξn orice alt mod decβt cu aprobarea scrisă a editorului.
Manuscrisele şi documentele nepublicate
(fotografii, pliante, cărţi) expediate pe adresa redacţiei,
din iniţiativa autorilor, nu se restituie.
Potrivit art.206 CP, responsabilitatea juridică
pentru conţinutul articolului aparţine autorului. De asemenea, ξn
cazul unor agenţi de presă şi personalităţi citate,
responsabilitatea juridică le aparţine.
Reproducerea
de părţi din această revistă este permisă cu acordul
scris al editorului
The copyright of parts from this
publication is allowed with the written agreement of the editor
Director
General Editura Ştiinţifică F.M.R.
Redactor
responsabil ing.
BRΒNDUŞA FLORENTINA SCORŢEA
Asistent
Editura Ştiinţifică F.M.R.
Procesare -tehnoredactare:
Anca Ion
Metalurgia
(revistă fondată ξn anul 1948)
federaţia
patronală metalurgia
şi
editura
ştiinţifică f.m.r.
Preşedinte
ing. borş ionel
|
FEDERAŢIA PATRONALΓ A RAMURII METALURGIE FEROASΓ ŞI NEFEROASΓ
ŞI PRODUSE REFRACTARE |
UniRomSider UNIUNEA PRODUCΓTORILOR DE OŢEL DIN ROMΒNIA Romanian
Steel Producers Union < Membru
al EUROFER> |
preŞedinte: BORŞ
ionel director
executiv: budur mircea |
||||
|
|
Organizaţia Patronală ARGOS din
ramura de metalurgie neferoasă |
preŞedinte: dobra Gheorghe |
||||
|
UNITUB |
Uniunea Generală a Producătorilor de Ţevi din
Romβnia |
preŞedinte: TERHEŞ GHEORGHE DIRECTOR
EXECUTIV: parpală vasile |
||||
preşedintele onorific al
editurii ştiinţifice f.m.r.
Dr. Ec. Lepădatu
V.Gheorghe
colegiul
onorific
(ξn
ordine alfabetică)
Εgren (Suedia), ameling dieter (GERMANIA), bensabra
hakim (algeria), BORDEA MARIUS, chabour
salem (algeria), chiţu gheorghe, french david (Australia), gencang
yang (china), mihaela grigore (australia),
JOANNA GROZA (UNIVERSITY OF CALIFORNIA, DAVIS, s.u.a.), P.D. hodgson
(deakin university, Australia), R.
S. HOUK (S.U.A.), T.Y.Hsu (China),
I. IMRI (TECHNICAL UNIVERSITY
OF KOICE, SLOVAK
REPUBLIC), ioan
romulus,
IVAN ION, jiang wan (china),
L. KUZNETSOV (LIPETSK STATE
TECHNICAL UNIVERSITY, RUSIA),V.MARINA (TECHNICAL UNIVERSITY,
CHIŞINĂU, MOLDOVA), y. matsubara
(Japonia), MARIA-TEREZA NOGUEIRA (FACULTY OF
SCIENCE AND TECHNOLOGY, LISABONA, PORTUGALIA), D. R. J. OWEN (SWANSEA,
UK), puşici miho
(Slovenia), radu nicu, rizescu
corneliu, roşescu
gheorghe (grecia), roxana
ruxandra (california), sakurovs richard (australia), TAKEHIDE SENUMA (OKAYAMA UNIVERSITY), TATEO USUI (OSAKA UNIVERSITY), S. VODENICHAROV (INSTITUTE OF
METAL SCIENCE, BULGARIA), w.m. nicola (tri. state university angola, indiana,
s.u.a.), xianqing you (china)
Preşedinţii
colegiului
de redacţie
Prof. dr. ing.
NICOLAE AVRAM
Prof. dr. ing.
SCORŢEA COSTIN
Colegiul
de redacţie
Prof. dr. ing. bejan
Mircea
Prof. dr. ing. cănănău
nicolae
Prof. dr. ing. Elena drăgulănescu, Catedra GDGI,
Facultatea de Inginerie Aerospaţială, U.P.B., Bucureşti
Prof.
dr. ing. Dumitrescu Constantin, membru corespondent al Academiei de
Ştiinţe Tehnice
Prof. dr. ing. hepuţ teodor
Prof. lawson christopher, Institutul Tehnic Copenhaga, Danemarca
Dr.
ec. LEPĂDATU V.
GHEORGHE: Universitatea Creştină Dimitrie Cantemir,
Bucureşti
Prof. dr. ing. MARIA NICOLAE
Prof. dr. doc. Oprea Florea, membru
al Academiei de Ştiinţe Tehnice
Prof. sahajwalla veena, Universitatea New South
Wales, Sydney,Australia
Prof. saiter Jean-marc, Universitatea Rouen, Franţa
Prof.
SALVO LUC, Institutul
National Politehnic, Grenoble, Franţa
Prof. dr. ing. samoilă
Corneliu
Prof. dr. ing. SCORŢEA COSTIN
Prof. dr. ing. SOFONEA GaLAgTION
Prof.
dr. ing. SOFRONI LAURENŢIE,
membru al Academiei de Ştiinţe Tehnice
Prof.
dr. ing. Şaban Rami, Decan, Facultatea de
Ştiinţa Materialelor, U.P.B. Bucureşti
Prof. dr. ing. ŞTEFĂNESCU DORU,
Ohio State University Columbus,
S.U.A.
Prof. dr. ing. VASIU TEODOR, Facultatea de
Inginerie, Hunedoara
Prof. dr. ZAINEA VIOREL, Institutul de
Fono-audiologie şi Chirurgie Funcţională ORL Prof. Dr. D.
Hociotă Bucureşti. Universitatea de Medicină şi Farmacie
Carol Davila Bucureşti
Referenţi ştiinţifici
Prof. dr. ing. Ciobanu
Ioan, Prof. dr. ing. anişoara
ciocan,
Prof. dr. ing.
Crişan Aurel, Prof. dr. ing. constantin
Nicolae,
Dr.
Hainăroşie Răzvan, Prof. dr .ing. Miloşan Ioan,
Prof. dr. ing. Nagy
Emil, Prof. dr. ing. Maria Nicolae
Prof. dr. ing. Tamara radu,, Prof. dr. ing. Doina Răducanu,
Prof. dr. ing. Rusu
Nicolae,, Prof. dr. ing. Rusu Tiberiu,
Conf. dr. ing. Semenescu Augustin,, Dr. ing. Varga Bela,
Conf. dr. ing.
Vizureanu Petrică
Redactor
şef prof. dr. ing. SCORŢEA COSTIN
SUMAR ISSN
0461-9579
cercetări din
domeniul StiinTa
materialelor
..
..
.
5 - 35
Maria
Nicolae, Irina Vξlciu, Negulescu Ionel, Netty Brβnduşa Milea, Dana
Şerban:Analiza posibilităţilor de deteriorare a calităţii
suprafeţelor
produselor sub influenta lichidelor
tehnologice ξn laminarea la rece a
benzilor
..
. 5
Neagu
Gigel, Ştefănescu Florin: Compozite Al-SiCp. Compatibilitatea
componentelor
......................................................................................................
13
Ana-Luciana
Rus: Consideraţii privind superplasticitatea indusă de tensiuni
interne ...................................................................................................................
20
Mariana Pop: Aspecte privind distribuţia temperaturii la
tragerea fără filieră ..... 26
Balaş M. Ioan: Asupra
implementării sistemelor adaptive ξn procesele de
tragere
..
. 30
TEHNOLOGII EMERGENTE ..............................................
36 - 43
Zainea
Viorel, HainĂroŞie Răzvan: Esofagoscopia pe tub metalic
rigid.
Actualităţi
şi perspective
... 36
Management
Economic Financiar.
contabilitate ξn
metalurgie.................................... 44 54
Lepădatu V. Gheorghe, Radu Sorin-Claudiu: Metoda ABM
(Activity
Basic Management
Managementul Activităţii de Bază)
. 44
Mihaela
Mureşan: Ingineria
afacerilor Arhitectura proceselor de afaceri ........ 47
F
Ştiri
.
...
.. I
F
Informaţii din metalurgia mondială
..
..
...
..
III
F Semnalări
..
..
.
...
V
o
Evenimente Internaţionale
..
.....
VII
F Conferinţe-Expoziţii-Tβrguri
.
VII
F Cărţi apărute la EDITURA
ŞTIINŢIFICĂ F.M.R.
...
..
..
.....
..
..
IX - XII
F
Revista revistelor
.
..
.
.
.
.
.
..
12, 19, 29, 35, 46
abstract metalurgia 12/2007
|
D.C.: 621.77.016.3 Key
words: pickling,
hot rolled-strip, cold-rolled strip, lubricant, rolling process Maria Nicolae, Irina Vξlciu, Negulescu Ionel, Netty
Brβnduşa Milea, Dana Şerban: The analysis of the possibilities of depreciation of the products
surface quality under the influence of the technological liquids in strip the
cold-rolling process Metalurgia (59) 2007, nr. 12, p. 5 In the strip rolling process, the surface quality can
be depreciated during the pickling, washing, lubrication operations, due to
the interactions between the rolled material and the technological fluids.
The surface quality and the technological fluids analysis has to be done
separatelly, in stages, but taking into account that there are successive
influences on the chain of pickling washing- lubrication processes. D.C.:
669.71 Key words:
aluminium, silicon carbide, particles, wettability, chemical reactions Neagu Gigel, Ştefănescu Metalurgia
(59) 2007, nr. 12, p. 13 The
paper presents the principal aspects regarding the obtaining of the mixture
aluminium - silicon carbide particles. It
is discussed about the wetting conditions and the critical acceleration
necessary for the incorporation of particles into the melt. The high values
obtained for this parameter involve to apply some methods to improve the wettability:
the covering of the complementary material with a thin layer of Ni, the
alloying of the aluminium melt, the overheating of the metallic bath and the
heat treatment of the silicon carbide particles with the aim to removal the
gases from the superficial layer and
to create an oxide layer. D.C.:
539.214 Key words:
superplasticity, thermal cycling, internal stress, strain rate, strain rate
sensitivity exponent Ana-Luciana Rus: Considerations concerning superplasticity induced by
internal-stresses Metalurgia
(59) 2007, nr. 12, p. 20 Phenomenologically, superplasticity is the capability
of certain alloys to undergo extensive, neck-free, tensile deformation prior
to fracture. There are two types of superplastic behavior in polycrystalline
solids: micrograin superplasticity and internal-stress superplasticity. In
this article is described the internal-stress superplasticity, the ways in
which internal stresses can be generated. These include: thermal cycling of
polymorphic materials through a phase change, thermal cycling of
polycrystalline pure metals or single-phase alloys that have anisotropic
thermal expansion coefficients, and thermal cycling of composite materials in
which the constituents have different thermal expansion coefficients. In case of superplasticity induced by internal
stresses, if internal stresses can be developed in materials, considerable
tensile plasticity can be obtained under the application of a low externally
stress, because the superplastic materials can have a strain-rate-sensitivity
exponent as high as unity, they can exhibit ideal Newtonian viscous behavior.
Such superplastic materials deform by a slip process, and a fine grain size
is not a necessary condition. Examples of internal-stress superplasticity are found
in polycrystalline zinc and alpha uranium. In these two metals, the internal
stress arises from the anisotropy of expansion coefficients present in these
non-cubic structure materials. During thermal cycling, internal stresses are
induced at the boundaries between adjacent grains. Materials that undergo polymorphic changes with
temperature can exhibit Newtonian viscous behavior when tested under
thermal-cycling conditions. The internal-stresses arising in this case from
the difference in molar volume between different phases during phase
transformation. Such behavior is known as transformation plasticity. The internal-stress superplasticity
can be utilized to enhance the ductility of metal-matrix composites that are
normally brittle. For example, in several whisker-reinforced metal-matrix
composites (aluminum containing 20% SiCw alloy) were induced the
superplastic behavior during deformation under thermal cycling conditions. An
exceptional tensile ductility can be achieved in this manner in a
whisker-reinforced 6061 aluminum alloy. Whereas the metal-matrix composite
exhibits only 12% elongation under isothermal deformation at 4500C,
the same composite exhibits 1400% elongation if deformed under thermal
cycling conditions (100↔4500C at 100 seconds per cycle). |
D.C.: 621.778.1 Key words: channel-less drawing
temperature, inductor Mariana Pop: Aspects
regarding the temperature distribution during the channel-less drawing Metalurgia (59) 2007, nr. 12, p. 26 Taking into account the importance of temperature
during the dieless drawing process, the aim of present paper is to present
some aspects regarding the temperature distribution in the drawn products.
The paper presents the results obtained for temperature distribution function
of drawing speed, inductor shape and inductor parameters D.C.:
621.778 Balaş M. Ioan: On the
implementation of adaptive systems within drawing processes Metalurgia (59) 2007, nr. 12, p. 30 The
paper approaches the theoretic baselines imposed by the necessity to
implement adaptive systems in the drawing of wires and bars, emphasizing the
advantages that come from maintaining the continuity of the thread, through
monitoring the drawing process, using ACC systems. The described running principle of ACC systems, allows the
monitoring of the plastic distortion, for the wire as well as in the bars
drawing. Key words: esophagoscopy,
methalic rigid tube, surgical instruments Zainea
Viorel, HainĂroŞie Răzvan: Esophagoscopy with metalic
rigid tube, present and future Metalurgia
(59) 2007, nr. 12, p. 36 The aim: a revue of a classical method for diagnosis and surgical approach to
esophagus by mean of a metallic rigid tube. The objective: an overview of the indications,
limits and actually used instruments in esophagoscopy with rigid metallic
tube. The results: clinical studies of many authors
shows the method to be a valuable one and to present a real potential
for development and improvements. Conclusions: It is necessary to develop and to improve a large
spectrum of surgical instruments according to a lot of clinical and lesional
situations. Key words: financial administration accountancy, cost
calculation, activity basic management, direct costs, indirect costs Lepădatu V.
Gheorghe, Radu Sorin-Claudiu: The ABM
method (Activity Based Management) Metalurgia
(59) 2007, nr. 12, p. 44 The activity management is based on undertaken
splitting by activities, similar to that defined by the ABC method. For some authors, the activity management is
considered as a development and improvement of the ABC method. For others,
ABC represents a subproduct of the activity management. A third category of authors has a different
conception, considering the ABC a calculation tool for costs, and the ABM
method as a psychology of the performance management. Key words: business engineering,
business architecture, business framework, model driven architecture Mihaela Mureşan: Business
Engineering - Business Architecture Metalurgia
(59) 2007, nr. 12, p. 47 The competitiveness of the metallurgical enterprise
depends of the profit-costs balance. The internal processes re-engineering
represents one of the ways of reducing the costs related to organizational
and management issues. The business architecture offers an efficient solution
for the business engineering and the re-engineering processes. This approach
strengthens the cooperation between the main actors involved in the business
architecture design and implementation, aiming at including all the
significant views in a integrated model. The main
goal of the development of a business architecture
is to offer a standard model for the integration of the internal processes
and for a better management of the technological and informational resources
of the enterprise. Such a standard approach has as main benefits the increase
of the management quality and the efficiency in the business processes,
contributing to the competitivity of the organization. |
Atenţie !
E Ξn conformitate cu paragraful 2.6 din acordul de
licenţă dintre EBSCO Publishing Inc. (S.U.A.) şi
FUNDAŢIA METALURGIA ROMΒNĂ (ROMΒNIA)
revistele METALURGIA şi METALURGIA INTERNAŢIONAL sunt incluse ξn baza
de date EP Products, ξncepβnd cu data de 1.07.2006.
E Revistele noastre pot fi găsite ξn baza de date
EBSCO pe site-ul: www.ebscohost.com la
rubrica Computers and Applied
Sciences Complete, poziţiile
1026 şi 1027.
E Ξncepβnd cu data de 01.01.2007 revista METALURGIA
INTERNAŢIONAL este introdusă şi ξn baza de date SCOPUS
aparţinβnd lui ELSEVIER BIBLIOGRAPHIC DATABASES Amsterdam (Olanda).
E According to paragraph 2.6 of license agreement between
EBSCO Publishing Inc. (U.S.A.) and FUNDAŢIA METALURGIA ROMΒNĂ
(ROMΒNIA) the journals METALURGIA and METALURGIA INTERNATIONAL are included in EP Products, starting from July 1st, 2006.
E These journals are included on EBSCOs site: www.ebscohost.com , chapter Computers and
Applied Sciences Complete, pozitions 1026 and
1027.
E Starting from January 1st, 2007 the
journal METALURGIA INTERNATIONAL is also in the SCOPUS database,
belonging to ELSEVIER BIBLIOGRAPHIC DATABASES Amsterdam (Netherlands).
Copyright © 2007 Nici un material din această
revistă nu poate fi reprodus, difuzat sau folosit ξn orice alt mod decβt
cu aprobarea scrisă a editorului.
Manuscrisele şi documentele nepublicate
(fotografii, pliante, cărţi) expediate pe adresa redacţiei, din
iniţiativa autorilor, nu se restituie.
Potrivit
art.206 CP, responsabilitatea juridică pentru conţinutul articolului
aparţine autorului. De asemenea, ξn cazul unor agenţi de presă
şi personalităţi citate, responsabilitatea juridică le
aparţine.
Reproducerea de
părţi din această revistă este permisă cu acordul
scris al editorului.
ANUNŢ
IMPORTANT
Revista METALURGIA (poziţia 480) şi revista METALURGIA
INTERNAŢIONAL (poziţia 481) sunt acreditate de CNCSIS la categoria
B+ .
Editura
Ştiinţifică F.M.R. se află la poziţia 104
|
Copyright © 2007 EDITURA ŞTIINŢIFICĂ F.M.R. EDITURĂ
ACREDITATĂ DE C.N.C.S.I.S. |
|
