The present paper is concerned to the theoretical and experimental study of the growth kinetics of allotriomorphic ferrite in medium carbon vanadium-titanium microalloyed steel. A theoretical model is presented in this work to calculate the evolution of austenite-to-allotriomorphic ferrite transformation with time at a very wide temperature range. At temperatures above eutectoid temperature, wh...

In this work, AISI 4340 steel was produced by powder metallurgy. Samples were sintered at 1150?C for 90 min. and then cooled in the furnace. Except to those as-sintered condition, one of samples homogenized 1 h air. Other deformed temperature range 1150-930?C deformation rate 30 60% followed cooling sand, air water mediums. The grain size gradually decreased depending on or steel. Small grains ...

Ni–51.4 at.% Ti (Nitinol) containing 24 and 34 vol.% orthogonally interweaving micro-channels with 350–400 lm diameters was fabricated by a powder-metallurgy method. NiTi powder preforms containing steel wire meshes arranged in parallel layers were hot-pressed into NiTi/steel composites, from which the meshes were removed electrochemically, thereby producing micro-channels with tailorable morph...

J. David, R. Frischer, P. Švec, R. Garzinová, Faculty of Metallurgy and Material Engineering, VŠB – Technical University of Ostrava, Czech Republic This paper is f ocused on c omputer aided t echnological processes of c ontinuous steel casting devic es. The paper characterized the fundamental aspects of creating computer aided control process of continuous steel casting operations. There is in ...