|
Editorial
office and administration: Editura
Ştiinţifică F.M.R.,
Calea Griviţei, nr. 83, sector 1,
O.P.12, cod 010705, Bucharest, ROMANIA Tel.: +(40)-1-310 71 38, +(40)-1-0722 665 071 Fax: +(40)-1-310
71 38 E-mail: redactia@metalurgia.ro www.metalurgia.ro Readers
from abroad can subscribe through Editura Ştiinţifică F.M.R. Conturile
EDITURII ŞTIINŢIFICE F.M.R.: Banca Comercială HVB Ţiriac S.A. Sucursala Rosetti, Bucharest, Romania RON: RO48BACX0000003002329000 USD: RO21BACX0000003002329001 EURO: RO91BACX0000003002329002 Copyright
© 2006 editura
Ştiinţifică F.M.R.-Bucharest,
Romania The
copyright of parts from this publication is allowed with the written
agreement of the editor. The
price for annual subscription:
USD 140
EURO 120 |
Metalurgia INTERNATIONAL (magazine set-up
in 1995) English version,
published by romanian metallurgical
foundation Honorary president
of scientific
publishing house f.m.r. Dr. ec. Lepădatu v. gheorghe
(2006)
no.5 romanian metallurgical
foundation Scientific publishing
house |
|||||
|
Honourary
Staff (in alphabetical order) bensabra
hakim (algeria), chabour
salem (algeria), gencang yang
(china), R. S.
HOUK (S.U.A.), I. IMRI (TECHNICAL
UNIVERSITY OF KOICE,
SLOVAK REPUBLIC), puşici miho (Slovenia),
roşescu gheorghe (grecia), roxana
ruxandra (california), w.m. nicola (tri. state university angola,
indiana, s.u.a.), xianqing you (china) |
||||||
|
scientific board staff Prof. colan horia Ph. D., member of Romanian Academy of
Technical Sciences Prof. Coşmeleaţă georgeta Ph. D. Prof.
Dumitrescu Constantin Ph. D., deputy member of
Romanian Academy of Technical Science Prof. French David Ph. D., CSIRO Energy Technology, Australia Prof. Găluşcă Dan-Gelu Ph. D. Prof.
Mihaela Grigore Ph. D., University of New
South Wales, Sydney, Australia Prof. Lawson Cristopher Ph. D., Copenhague Technical Institute, Denmark Prof. Nicolae Avram Ph. D. Prof. Maria Nicolae Ph. D. Prof.
doc. Oprea Florea Ph. D., member of Romanian
Academy of Technical Sciences Prof.
Veena Sahajwalla Ph. D., University of New South Wales, Sydney, Australia Prof. Sakurovs Richard Ph. D.,
CSIRO Energy Technology, Australia Prof. Salvo Luc Ph. D., Grenoble National Politechnical
Institute, France Prof. Saiter Jean-Marc Ph. D., Rouen University, France Prof. Scorţea Costin Ph. D. Prof. Simiti Ioan Vida Ph. D. Prof.
Sofroni Laurenţie Ph. D., member of
Romanian Academy of Technical Sciences Prof. Şaban Rami Ph. D Scientific refferents team: Prof. bejan Mircea Ph. D Prof. cănănău nicolae Ph. D Prof. hepuţ teodor Ph. D Prof. TODERIŢA
NEMEŞ Ph. D Prof. Doina Răducanu Ph. D Prof. Ripoşan Iulian Ph. D Prof. samoilă Corneliu Ph. D Prof. SOFONEA GALAFTION Ph. D Managing Director: Editor-in-chief: Professor Scorţea
Costin Ph. D. Manager Scientific Publishing House F.M.R.: eng. Florentina
Brβnduşa Scorţea |
Contents Issn 1582 2214 Mihaela Grigore, Sakurovs Richard, French David, Veena
Sahajwalla: Influence of mineral matter on coke reactivity with carbon dioxide ...
. 5 Ana Veteleanu, Bodea F., Bot
D.: The influence of cooling
rate and of copper content on the characteristics of binary Al-Cu alloys
.. 22 Geamăn
Virgil: CastCon A new
manufacturing technology for
aluminum alloy parts
29 Ana-Luciana Rus , Canta Traian, Frunză Dan: Aspects
concerning characterization at high temperatures of the 2024 aluminium alloy
.... 32 Tintelecan Marius: The loss of protective layer (of Zn or Zn-Al)
in the wires drawing process
... 37 ? FOSECO
Turbostop system reference list
.
. I - II ? Press
release
..
..
.....................
III IV ? New books,
published by romanian metallurgical
foundation
..... V - VI |
|||||
abstract
metalurgia International 5/2006
|
D.C.: 662.741.3 Mihaela Grigore, Sakurovs Richard, French David,
Veena Sahajwalla: Influence of
mineral matter on coke reactivity with carbon dioxide Metalurgia
International (vol. XI), no.5, 2006, p. 5 A method to improve blast
furnace efficiency and make it sustainable is to lower the temperature of the
iron oxide reduction using a highly reactive coke. Understanding the role of
coal rank, maceral composition and mineral matter in coke in the gasification
reaction under these new conditions is of major importance. Four cokes
prepared from Australian coals of varying rank, maceral composition and ash
composition were gasified with carbon dioxide. The rank and maceral
composition of the parent coals did not appear to be related to the
reactivity of the cokes. However, coke reactivity increased with increasing
total amount of catalytic minerals in crystalline phases such as metallic
iron, iron sulfides. Calcium sulfide could be a potential catalyst for the
gasification reaction. Iron, potassium and sodium present in the amorphous
phase did not appear to have any
effect on coke reactivity. Calcium was present only in the crystalline
phases. Knowing the form and amount of the mineral phases that catalyse the
gasification reaction in coke would improve the ability to predict coke
reactivity. This knowledge would contribute to more efficiency matching cokes
to blast furnace requirements. D.C.: 669.228 Key words: solidification, dendrite arm spacing, cooling rate, grain size Ana
Veteleanu, Bodea F., Bot D.: The influence of cooling rate
and of copper content on the characteristics of binary Al-Cu alloys Metalurgia
International (vol. XI), no.5, 2006, p. 22 The influence of
the cooling rate and copper content on the evolution of grain size and on the
dendrite structure was studied and also we try it to establish a relationship
between dendritic arm spacing (DAS) and cooling rate (Vcool). The experiments
were performed on samples made from binary AlCu alloys contained 1, 2, 3 and
4% Cu. The results of structural analysis show that microstructure strongly
depends on the cooling rate and on the chemical composition. D.C.: 669.2 Key words: CastCon process, powder metallurgy, isostatic
processing, casting, forging Geamăn
Virgil:
CastCon A new manufacturing
technology for aluminum alloy parts Metalurgia
International (vol. XI), no.5, 2006, p. 29 CastCon is a new manufacturing
approach which combines casting, forging, P/M (powder metallurgy), bonding
and coating in one process to produce high performance components. It is
capable of producing |
prototypes with a wide variety of sizes, shapes,
materials and structural characteristics with short lead time. The
paper presents some experimental data obtained by manufacturing due CastCon
process of a Romanian very used Al-Si alloy in automotive industry. D.C.: 669.71 Key words: 2024 aluminium alloy, thermomechanical processing,
strain rate Ana-Luciana Rus , Canta Traian, Frunză Dan: Aspects concerning characterization at high
temperatures of the 2024 aluminium alloy Metalurgia
International (vol. XI), no.5, 2006, p. 32 The 2024 aluminium alloy is commercially developed
because of its interesting mechanical properties. It is used for aircraft
structures, truck wheels, screw machine products and other miscellaneous
structural applications. The superplastic potential of a commercial 2024
aluminium alloy, fabricated by the classical ingot metallurgical processing
route, has been investigated. A special thermomechanical processing was
developed for this alloy to obtain a fine structure before superplastic
testing. Constant strain rate tests were performed to characterise the
superplastic behaviour of this alloy. All tests were performed in the
temperature range of 450χ4800C, and in the strain rate range of
8x10-4χ5x10-3s-1. Elongations to failure in
excess of 200% were obtained at a temperature of 4600 and 4800C.
The deformation characteristics were correlated with the results of
microstructure investigation. D.C.: 669.5 Key words: drawing, steel wire, protective layer, Zn layer,
Zn-Al layer, loss by drawing Tintelecan Marius: The loss of protective layer (of Zn or Zn-Al) in the
wires drawing process Metalurgia
International (vol. XI), no.5, 2006, p. 37 The paper
evaluates the loss rate of the protective layer (of Zn respective Zn-Al
alloy), deposited on steel wire surface from specific meltings, so in Hot
Dip variant) recorded for successive drawings of steel wire. Are necessary
to be emphasized from start three remarks: 1.
In 2.
The determination of the loss rate of protective
layer was realized by statistical analysis of great volume, of the protective
layers thickness resulted by successive drawings. 3.
Zn-Al alloy has chemical composition as to the
eutectic point from equilibrium diagram Zn-Al. In paper the term steel wire will be replaced with the
term OLC 50X wire, OLC 50X being the steel used for experiments. |
|
Copyright © 2006 The f.m.r. scientific publishing house,
accredited by the
romanian council for universitary research |
|
