Redacţia, administraţia: Calea Griviţei, nr.83,  Sector 1, O.P. 12, Cod 010705, Bucureşti

Tel.:    004 021/650 60 59, 004 021/683 50 54

GSM: 0722 665 071; 0724 537 051;0744 386 196

Fax:    004 021/650 60 59,

E-mail: metalurgia@b.astral.ro; www.metalurgia.ro

Contul EDITURII ŞTIINŢIFICE F.M.R.:

Cont lei: 4260-103743-001 BCIŢ Sucursala Rosetti

$: 4260-103743-002 BCIT Sucursala ROSETTI BUCUREŞTI

Euro: 4260-103743-003, SWIT-CBIT RO  BU

Costul unui abonament: lei 4 200 000

Copyright © 2003 EDITURA ŞTIINŢIFICĂ F.M.R.

Nici un material din această revistă nu poate fi reprodus, difuzat sau folosit în orice alt mod decât 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, în 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

Metalurgia

Revistă editată de editura ştiinţifică f.m.r.

preşedintele onorific al

editurii ştiinţifice f.m.r.

Dr. Ec. Lepădatu V.Gheorghe

       Nr.11

                                                                         noiembrie

                                                                          2003

preşedintele onorific al

colegiului de redacţie

PAUL TUDOR

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),

ioan vârcolacu, ELISABETA VASILESCU

preşedinTii CONSILIULui

sTIINTIFIC de redacţie

Prof. dr. ing. AVRAM NICOLAE

Prof. dr. ing. COSTIN SCORŢEA

Preşedinte onorific al colegiului executiv de redacţie

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. victor constantinescu

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 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

Ionescu marian: Diminuarea conţinutului de gaze în procesul elaborării oţelurilor prin procedeul l.f. (ladle – furnace)………………………….…..5

Berar Alexandru Ilie, Vermeşan George: Cercetări experimentale privind patentarea în baie de plumb a sârmelor din oţel SWRH 82 B…….8

Patic Ciprian Paul, Popa Ion Florin: Influenţa unor factori metalurgici asupra unor indicatori de prelucrabilitate ai oţelurilor refractare ……....15

Hotea V., Iepure Gheorghe, Mariana Zsigmond: Modelarea procesului de evaporare a aluminiului în cuptorul cu flux de electroni ……………...22

Smaranda Emilian, Sontea Sever: Consideratii asupra posibilitãtii eliminãrii deformãrii plastice şi microdestructiilor otelului rotilor de locomotivã……………………………………………………………………..27

Ana – Luciana Rus: Modificarea microstructurilor pentru superplasticitate….32

Rodica Mariana Ion, N.Ion: Materiale moleculare avansate pentru aplicaţii neconvenţionale. metode de sinteza si asamblare. Partea a-I-a….…………38

Ermina Tapu, Nicoleta-Liliana Fratila: : Influenţa materialelor asupra formelor aparente ºi aplicaţiile lor în design. ….…………47

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

+ Ştiri………………………………..…………………….……..…………...……………………..III

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

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

+ Rezumate………………………………..…………………...……………….…..……………..…IX

+ Evenimente internaţionale …………………………….……...……………..…………......…...…X

ª        Conferinţe-târguri ……………………………………………………………………...X

+ Recenzii………………………………………….…..……..…………….………………..………XI

+ Cărţi noi……………………….……….………...……………………………………………...XIV

+ Cărţi apărute  la Editura Ştiinţifică  F.M.R……….……...……………….………...…...XV-XVI

+ Revista Revistelor …..………………..……………………..…….…14, 31, 37, 46, IV, VIII, XIV

D.C.: 669.18

marian Ionescu: Diminishing of gas contents during steelmaking, by lf process

Metalurgia (55) 2003, nr.11 p.5

The LF process presents both economical and quality advantages. During this process, a powerfull desulphurizing process is taking place, together with an advanced deoxidation. During the experiments, both gas contents evolution and its effect on physical and mechanical properties were investigated.

D.C.: 621.778.2

Key words: wire, SWRH 82B steel, patenting, sorbyte, sorby-perlite, isothermal transformation, lead bath, mechanical proprieties, microscopically examinations.

Alexandru Ilie Berar, George Vermeşan: Research Regarding Patenting of Steel Wire from SWRH 82 B in Lead Bath

Metalurgia (55) 2003, nr.11, p.8

This paper presents the influence of patenting of SWRH 82B steel proprieties before and after patenting in lead bath. For a better understanding of this influence here are also presented the structure of steel before and after patenting in lead bath.

D.C.: 669.14.018.44

Paul Ciprian Patic, Ion Florin Popa: Effect of Metallurgical Factors on Machinability Indicators of Refractory Steel  

Metalurgia (55) 2003, nr.11, p.15

The paper is structures into three distinct parts. The first one includes some refferences regarding steelmaking process, the main steelmaking routes being presented.

The second part describes some aspects regarding the solidification during this process being presented.

The third part presents some refferences regarding the effect of chemical composition on machinability indicators.

D.C.: 669.71

V.Hotea, Gheorghe Iepure, Mariana Zsigmond: Modelling of Aluminium Vaporization Process in the Electronic Flux Furnace

Metalurgia (55) 2003, nr.11, p.22

In order to obtain the titan-based alloys, the electric-arc and the electronic-flux furnaces are used, throughout the world. The obtaining of a certain composition of the titanium-aluminum-based alloys using the electronic-flux furnace is a difficult problem because of the high natural trend of aluminum to vaporize. This paper presents some

experimental results and a method to model the loss of aluminum in the vaporization process. This model allows the determination of the necessary composition of the initial charge in order to obtain the desired composition of the final titanium-aluminum alloy.

D.C.: 539.374

Key words: wheel rim steel, wheel rim, martensite, microcracks, peeling off, reprofiling, new material, engine, bogie

Emilian Smaranda, Sever Sontea: Considerations regarding possibilities to eliminate plastic deformation and steel microdestructions of engine wheels

Metalurgia (55) 2003, nr.11, p.27

Evolutions in railway development require optimisation and improvement of all parameters characterising railway vehicles, taking into account safety and transport costs conditions.

Improving of knowledge about operation mode and characteristics of components take place during the cooperation among producers and customers. At the same time are taken into account the optimisation conditions of operation itself.

During operation, contact loads between rai land wheel, at temperatures between -35⁰C and + 1200⁰C, explained by friction phenomena, are developed.

The paper present a new and interesting solution of operation life prolongation of wheel rims and engine wheels, during the cooperation between producer (SMR Bals-Romania) and an yugoslavian customer.

D.C.: 620.186

Key words:superplasticity, microstructure, grain refinement.

Ana-Luciana Rus: Development of Microstructures for Superplasticity  

Metalurgia (55) 2003, nr.11, p.32

Because superplastic behaviour is dependent on grain size, alloy selection and processing for grain refinement and for restriction of grain growth during deformation at elevated temperatures are central objectives to the study of the phenomenon of superplasticity and to the development of new types of superplastic materials. In this paper, processing for grain refinement and grain growth control are reviewed.

Key words: smart materials

Rodica Mariana Ion, N.Ion: Advanced molecular materials for nonconventional sinthesis and assembly methods. Part I

Metalurgia (55) 2003, nr.11, p.38

,

Ermina TAPU, Nicoleta-Liliana FRATILA: The Influence Materials have on the Apparent Forms and theirs Application in Design  

Metalurgia (55) 2003, nr.11, p.47

Starting from the idea that material is the one that pictures itself to the human perception, in the present article it is presented a study showing its influence on the aesthetical appearance of the industrial products. The aesthetic evaluation of a product is the result of the human creation and need’s to be performed by an individual who is an expert in the field.