EDITORIAL OFFICE AND ADMINISTRATION: EDITURA ŞTIINŢIFICĂ F.M.R., CALEA GRIVIŢA, NR. 83, SECTOR 1, O.P.12, COD 010705, BUCHAREST, ROMANIA Tel.: +(40)-0372926401; +(40)-0724537051 +(40)-0722696187; +(40)-0724296800 +(40)-0722311272; +(40)-0735547316 Fax: +(40) 021-31512 32 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. BANCPOST Sucursala Griviţa, Bucureşti RON: 82BPOS70706464746RON01 ATEBANK ROMANIASucursala Bucureşti-Griviţa RON: RO53MIND001000007585RO01 USD: RO67 MIND 001 00000 7585 US01 EURO : RO10 MIND 001 00000 7585EUR01 Copyright © 2013 Editura Ştiinţifică F.M.R.-Bucharest, ROMANIA Penal Criminal Code According to the juridical responsibility for the whole paper content is belonging to the authors. No paper introduced in this journal can be reproduced, or used without the written approval of the editor. EDITOR IN CHARGE Prof. Gheorghe V. LEPĂDATU Ph.D gheorghe.lepadatu51@yahoo.ro SENIOR EDITOR Mihai Alin POP Ph.D alinpma@yahoo.com EDITOR Bogdan FLOREA Ph.D florea_b2004@yahoo.com MANAGING DIRECTOR EDITOR-IN-CHIEF Prof. Costin SCORŢEA Ph. D. MANAGER SCIENTIFIC PUBLISHING HOUSE F.M.R.: Florentina Brândusa SCORŢEA METALURGIA INTERNATIONAL ISSN 1582 - 2214 SPECIAL ISSUE NO 4 2013 Romanian Metallurgical Foundation Scientific Publishing House HONORARY PRESIDENT OF SCIENTIFIC PUBLISHING HOUSE F.M.R. EDITOR IN CHARGE Prof. Gheorghe V. LEPĂDATU Ph.D Vice-Rector of DIMITRIE CANTEMIR CHRISTIAN UNIVERSITY BUCHAREST gheorghe.lepadatu.51@yahoo.com PRESIDENT HONOURARY STAFF ŞTEFĂNESCU DORU Ph. D., Ohio State University Columbus, S.U.A. (in alphabetical order) Chenguan BAI - College of Materials science and engineering Chongqing University, CHINA Constantin DUMITRESCU - Member of Romanian Academy of Technical Sciences, ROMANIA I. IMRIŠ - Technical University of Košice, SLOVAK REPUBLIC Jingshe LI - University of Science and Technology Beijing, CHINA W.M. NICOLA - Tri. State University Angola, Indiana, S.U.A. Ion STANCU - Bucharest Academy of Economic Studies Qingguo XUE - University of Science and Technology Beijing, CHINA Zhengliang XUE - Wuhan University of Science and Technology, CHINA Gencang YANG - Chongqing University, CHINA Zhenkui YIN - University of Science and Technology Beijing, CHINA Xianqing YOU - Wuhan University of Science and Technology, Wuhan, CHINA Liangying WEN - Chongqing University, CHINA EDITORIAL BOARD PRESIDENT: Prof. Maria NICOLAE Ph. D., Bucharest Politechnical University, Romania Prof. Marian BORDEI Ph. D., Dunărea de Jos University Galați, Romania Prof. Voicu BRABIE Dalarna Univerbity Suedia Prof. Ilie BUTNARIU Ph. D., Bucharest Politechnical University, Romania Prof. Horia COLAN Ph. D., Deputy member of Romanian Academy Prof. Nicolae CONSTANTIN Ph. D., Bucharest Politechnical University, Romania Prof. Adrian DIMA Ph. D., Member of Romanian Academy of Technical Sciences Prof. Corina Adriana DUMITRESCU Ph. D., Dimitrie Cantemir University, Romania Prof. Arpad FAY Ph. D., University of Miskolcz, Hungary Prof. FRENCH DAVID Ph. D., CSIRO Energy Technology, Australia Prof. Mira Ricardo GARCIA Ph. D., University of Coruna, Spain Prof. Teodor HEPUT Ph. D., Hunedoara Engineering Faculty, Romania Prof. Gheorghe LEPADATU PH.D. Dimitrie Cantemir University, Romania Prof. Tiberiu MĂNESCU Ph. D., Eftimie Murgu University Reşiţa, Romania Prof. Ioan MILOŞAN Ph. D., Transylvania University Brasov, Romania Prof. Valentin NEDEF Ph. D., Engineering Faculty of Bacău University, România Prof. Avram NICOLAE Ph. D., Bucharest Politechnical University, Romania Prof. doc. Florea OPREA Ph. D., Member of Romanian Academy of Technical Sciences Prof. Florentina POTECAŞU Ph. D., Dunărea de Jos University of Galaţi, Romania Prof. Radu TAMARA Ph. D., Dunărea de Jos University Galati, Romania Prof. Doina RĂDUCANU Ph. D., Bucharest Politechnical University, Romania Prof. Iulian RIPOSAN Ph. D., Bucharest Politechnical University, Romania Prof. Tiberiu RUSU Ph. D., Technical University Cluj-Napoca, Romania Prof. Jean-Marc SAITER Ph. D., Rouen University, France Prof. V.I. SAFTA Ph. D., Member of Romanian Academy of Technical U.T.Timisoara,Romania Prof. Luc SALVO Ph. D., Grenoble National Politechnical Institute, France Prof. Cornel SAMOILĂ Ph., Transilvania University, Full member of Romanian Academy of Technical Science Prof. Laurenţie SOFRONI Ph. D., Member of Romanian Academy of Technical Sciences Prof. Marin TRUŞCULESCU Ph. D., Member of Romanian Academy of Technical Sciences Prof. Petrica VIZUREANU Ph.D ,Technical University Gh. Asachi, Iasi, Romania Prof. Viorel ZAINEA Ph. D., University of Medicine and Pharmacy “CAROL DAVILA”, Bucharest, Institute of Phonoaudiology and Functional ENT Surgery Prof. Dr. D. Hociota, Bucharest, Romania ADVISORY BOARD : PRESIDENT: Prof. Augustin SEMENESCU Ph. D. Bucharest Politechnical University, Romania VICE-PRESIDENT: Prof. Alina Adriana MINEA Ph. D., Technical University Gh. Asachi Iasi, Romania Prof. Marin ANDREICA Ph. D - Academy of Economic Studies, Bucharest, Romania Prof. Erika ARDELEAN Ph.D - Politehnica University of Timişoara, Romania Prof. Ionel BOSTAN Ph. D - “Stefan cel Mare” University of Suceava, Romania Prof. Florina BRAN Ph.D - The Bucharest Academy of Economic Studies, Romania Assoc. Assoc.Prof.Mihai BUTU Ph.D - Politehnica University Bucharest, Romania Assoc. Prof. Denis CHAUMONT Ph.D - Bourgogne University of Dijon France Prof. Anisoara CIOCAN Ph.D - “Dunărea de Jos” University of Galaţi, Romania Lecturer Floarea GEORGESCU Ph.D - Spiru Haret Universitaty, Romania Prof. Brandusa GHIBAN Ph. D - Politehnica University Bucharest, Romania Prof. Nicolae GHIBAN Ph.D - Politehnica University Bucharest, Romania Assoc. Prof. Guibao QIU Ph. D.- Chongqing University, China Assoc. Prof. Xuewei LÜ Ph. D.- Chongqing University, China Prof. Dumitru V. LEPADATU Ph. D - Tehnical University “ Gh. Assachi” Iasi, Romania Prof. Nicu MARCU Ph. D - University of Craiova, Romania Assoc. Prof. Adrian MICU Ph .D - “Dunarea de Jos” University Galati, Romania Assist. Bogdan MASTALIER M.D., University of Medicine and Pharmacy “Carol Davila” Bucharest, Romania NarcisaRoxanaMOSTEANUPhD.-TheBucharestAcademyofEconomicStudies, Romania Prof. Ion PARGARU Ph. D - Politehnica University Bucharest, Romania Prof. Rodica POPESCU Ph.D. - Transylvania University Brasov, Romania Prof. Ana SOCALICI Ph.D - Politehnica University of Timişoara, Romania Prof. Ion STANCU Ph. D.- Bucharest Academy of Economic Studies Prof.AureliaFeliciaSTĂNCIOIUPh.D-AcademyofEconomicStudies, Bucharest, Romania Prof. Daniela TARATA Ph.D - University of Craiova, Romania Prof. Bela VARGA Ph. D - Transylvania University Brasov, Romania Assoc. Prof. Marius VASILESCU Ph.D - Politehnica University Bucharest, Romania Prof. Ana VETELEANU Ph. D - Transylvania University Brasov, Romania Prof. Maria VLAD Ph .D - “Dunarea de Jos” University Galati, Romania Assoc. Prof. Chen YUANQING - Chongqing University, China Assoc. Prof. Shengfu ZHANG Ph. D. - Chongqing University, China