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Metalurgia

Revistă editată de editura ştiinţifică f.m.r.

preşedintele onorific al

editurii ştiinţifice f.m.r.

Dr. Ec. Lepădatu V.Gheorghe

Nr.2

februarie

2004

Preşedinte al colegiului executiv de redacţie

Prof. dr. ing. COSTIN SCORŢEA

colegiul onorific de redacţie

(în ordine alfabetică)

I.Ågren (Suedia), dieter ameling (GERMANIA),cornel chiriac, gheorghe chiţu, SORIN DIMITRIU,R. S. HOUK (U.S.A.),

T. Y. Hsu (China), christopher lawson (danemarca), petru moldovan, D. R. J. OWEN (SWANSEA, UK),

laurenţie sofronie, gheorghe roşescu (grecia),

Jean-marc saiter (franţa), ioan vârcolacu

preşedinTii CONSILIULui

sTIINTIFIC de redacţie

Prof. dr. ing. AVRAM NICOLAE

Prof. dr. ing. COSTIN SCORŢEA

Consilieri ştiinţifici

Prof. dr. ing. COSTIN SCORŢEA, Prof. dr. ing. MARIA NICOLAE,

Prof. dr. ing. DOINA RĂDUCANU, Prof. dr. ing. Nicolae constantin,

Conf. dr. ing. AUGUSTIN SEMENESCU

Colegiul onorific executiv de redacţie

Prof. dr. ing. Mircea bejan

Prof. dr. ing. Daniel bunea

Prof. dr. ing. ADRIAN DIMA

Prof. dr. ing. ION CIUCĂ

Prof. ing. DORIN DOBROVICI

Prof. dr. ing. teodor hepuţ

Prof. dr. ing. GHEORGHE IONIŢĂ

Prof. dr. ing. IOAN GIACOMELLI

Prof. dr. ing. tiberiu mănescu

Conf. dr. ing. PETRE stelian NIŢĂ

Prof. dr. ing. Tiberiu Rusu

Director General Editura Ştiinţifică F.M.R.

Redactor Şef. Ing. BRÂNDUŞA FLORENTINA SCORŢEA

Asistent Editura Ştiinţifică F.M.R.

Procesare -tehnoredactare:

ANCA ION

SUMAR ISSN 0461-9579

Almăşan Ştefan, Maria Nicolae, Nicolae Avram: Importanţa unor caracteristici de electrod în funcţionarea cuptoarelor cu arc electric (CAE) moderne …………………….......…………..........5

Ciurea Aurel, Tănase Dinel, Bordei Marian: Factorii care influenţează capacitatea de deformare plastică la cald a fontelor ……...…….9

Tănase Dinel, Bordei Marian, Ciurea Aurel: Proprietăţile termice şi magnetice ale aliajelor Fier – Nichel………….................…..14

Călaie Mândru, Maria Nicolae, Nicolae Avram: Caracterizarea companiei, analiza de piaţă şi prezentarea obiectivelor strategice-componente ale studiului de viabilizare……………..............……22

Hotea Vasile, Mariana Zsigmond, Iepure Gheorghe: Cinetica proceselor de eliminare a impurităţilor din baia metalică la rafinarea termică a cuprului……………...............................…….28

Chiţu Gheorghe: Relansarea fabricaţiei de produse lungi în metalurgia românească……………………………………………………....34

+ Informaţii din metalurgia mondială…………………..………………..........…….…………….I

+ Ştiri………………………………..………………………….……..……….…....................………..IV

+ Ştire de presă ………………………………………...……….…………………………….......…...V

+ Semnalări……………………….……….…………………………………..…....…….……............VI

+Rezumate ……………………………………………………………………………………..….......VII

+ Evenimente internaţionale …………………………….………..……….….....................XI

ª Congrese-târguri………………………………….………………….…………..…....XI

+ Cărţi noi……………………………………………………………………………….....................XV

+ Societatea română de biomateriale (selecţiuni din comunicări ştiinţifice )…………….....XVI

+ Cărţi apărute la Editura Ştiinţifică F.M.R……………..…………..……...…..................XIX-XX

+ Revista Revistelor ...............…..………………..……8, 13, 21, 27, 40, III, IV, X, XIV, XV, XVIII

abstract metalurgia 2/2004

D.C.: 669.041.38

Ştefan Almăşan, Maria Nicolae, Avram Nicolae: Importance of some electrod characteristics for modern EAF operation

Metalurgia (56) 2004, nr.2 p.5

Increasing of economical and metallurgical performances of electric arc furnaces (EAF) required esential modifications regarding the electrotechnological regime of the furnace. Parameters of electrodes, like electrode diameter and electrodes specific consumption are presented as very important for electrometallurgical performances of the furnaces.

D.C.: 539.374

Aurel Ciurea, Dinel Tănase, Marian Bordei: Factors that Influence the Hot Plastic Deformation Capacity of the Cast Irons

Metalurgia (56) 2004, nr.2, p.9

The hot plastic deformation capacity of the cast irons is conditioned by several factors that imply: the chemical composition, the graphite shape, the deformation speed, the state of tension. Each of these factors can, positively or negatively, influence the hot plastic deformation and, for this reason, before of some cast iron marks we must deeply analyse the way this can be influenced by the up mentioned factors.

D.C 669.018.58

Dinel Tănase, Marian Bordei, Aurel Ciurea: The thermal and magnetic Properties of the iron – Nichel Alloys

Metalurgia (56) 2004, nr.2, p.14

The development in the domain of the measurement devices and equipment is highly connected to the researches and discoveries from the materials science, in the sense of obtaining new materials with high characteristics. The researches and experiments are performed in this respect, the special elasticity, magnetic or thermal properties of the Fe-Ni alloys (with a high content of nickel) being considered essential for the materials used in the construction of the measurement equipment.

D.C.: 669; 380.133

Mândru Călaie, Maria Nicolae, Avram Nicolae: Company characterisation, market

analysis and presentation of strategic targets-components of restructuring study

Metalurgia (56) 2004, nr.2, p.22

Paper is destinated to establish the required activities and measures in order to restructure a Romanian iron and steel company, having the following product mix in 2001:

· crude steel: 376,000 tons;

· finished rolled products: 212,000 tons;

· billets for seamless tubes: 105,000 tons.

The restructuring strategy includes:

· Industrial restructuring: investment volume, product mix, market;

· Financial restructuring: steps intended to be performed for financial-economic recovery.

· Social restructuring: labour force evolution, correlated to industrial and financial restructuring.

D.C.: 669.35

Key words: copper, lead, iron, stibium, residual concentration, impurity, repartition coefficients

Vasile Hotea, Mariana Zsigmond, Gheorghe Iepure: Impurities removal process kinetics from the bath during the copper thermal refining

Metalurgia (56) 2004, nr.2, p.28

Through the agency of these experimental researches made in this work it has been had in wiew variation of the velocity in the elimination of lead, iron and antimony from the molten bath depending on the length of the process and on the remanent concentration. In this way it has been determined the impurities repartitio coefficients of the equilibria between the metal and slag concerning the Cu-Pb-O, Cu-Fe-O and Cu-Sb-O systems.

D.C.: 621.771

Gheorghe Chiţu: Long products manufacturing relaunching in Romanian Iron and steel industry

Metalurgia (56) 2004, nr.2, p.34

Results of some prospective investigations on domestic and international market of hot rolled long products are presented in the paper. All the same time, steps to be adapted for relaunching of this type of manufacturing in Romania are analysed.