Articles

Porosity of sintered tin bronzes

The paper aimed at quantifying effects of change of raw materials used for tin bronzes (Cu-Sn mechanically pre-alloyed powders compared to Cu-Sn pure components mixture), and of thermal and temporal sintering parameters on sintered products porosity; the relation between

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The influence of Sub-Critical Thermochemical Processing on Fatigue Resistance of 42CrMo4 Steel

The influence of Sub-Critical Thermochemical Processing on Fatigue Resistance of 42CrMo4 Steel, Mihai Cojocaru, Leontin Druga, Daniela Dragomir, U.P.B. Sci. Bull., Series B, Vol. 77, Iss. 2, 2015 ISSN 1454 – 2331 The machine parts, fasteners and many other components require

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The Effect of Ce Added to Carburizing Paste on Phase Composition of Carburized Surface Layers

Mihai Cojocaru, Daniela Dragomir, Leontin Druga, Victor Kuncser and Petre Badica, Trans Tech Publications, Switzerland/Advanced Materials Research Vol 1114 (2015) pp 183-189 Investigations on carburized layers phase composition are usually made by optical microscopy, electron

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The mathematical modelling of 21NiCrMo2 low alloy steel carburising in less common carburising media

Dragomir D, Cojocaru M. O, Drugă L.N, International Journal of Microstructure and Materials Properties (IJMMP), vol.9, no.1, 2014, pp.60-70, Publisher Inderscience Publishers The experimental research aimed at mathematical modelling of the carburising process in less common

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Recent Researches in Metallurgical Engineering – From Extraction to Forming

The Estimation of the Quenching Effects After Carburising Using an Empirical Way Based on Jominy Test Results by Mihai Ovidiu Cojocaru, Niculae Popescu and Leontin Drugă In Book: Recent Researches in Metallurgical Engineering - From Extraction to Forming Edited by Mohammad

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Deep case carburizing process

Druga L., Cojocaru M., Dragomir D., Deep case carburizing process, Metal Russia, September 2014, pages 32-34 To optimize the deep case carburizing process (2 ... 8 mm) is a major challenge by theoretical and practical point of view - the modeling of the carbon diffusion processes

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Heat treatments in Romania

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Installation for quenching of the guidances sliding bars of machines tools

● The austenitizing of the linear guideways is performed in the walking beam furnace, the supply is provided in automatic tact. The linear guideways move step by step and then enter in the forechamber of the walking beam furnace where they are maintained as long as the temperature

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