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Angelescu N.,University Valahia of Targoviste | Paunescu L.,Metallurgical Research Institute Bucharest | Surugiu G.,Metallurgical Research Institute Bucharest
Metalurgia International | Year: 2010

The paper presents theoretical considerations on heat transfer through the refractory lining of thermal technological installations hot sectors specific, focusing on the influence of porosity and density of insulation materials on thermal conductivity. Also, they are presented concerns of the group of authors into reducing of heat losses through the refractory lining of steel ladles with capacity of 180 t. © 2010 Editura Ştiinţificǎ.

Rusanescu C.O.,Polytechnic University of Bucharest | Rusanescu M.,Valplast Industries Bucharest | Iordanescu T.,Metallurgical Research Institute Bucharest | Anghelina F.V.,University Valahia of Targoviste
Journal of Optoelectronics and Advanced Materials | Year: 2013

The aim of the paper is to assess mathematical relationship between alloying elements and technological deformability indexes. The subject proposed is settled through a laboratory experiment, where plasticity is appraised by pressing tests. Three steel grades are used. (OLT 35 K, 16 Mo 3, 14 CrMo 4) in order to determine their grain growth trend and their initial grain size at austenitization temperature. Structural analysis examined surfaces was performed for each steel grade for the following purposes: to determine the trend of increasing grain; determining initial grain austenitization temperature used in attempts (Ta = 12000C) determine the deformation temperature austenitic grain.

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