Browsing by Keyword "Carbides"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Sintesis autopropagada a alta temperatura (SHS) del masteralloy Fe(TiMo)C utilizando ferroaleaciones(2009-05) Erauskin, J. I.; Sargyan, A.; Arana, J. L.; Centros PRE-FUSION TECNALIA - (FORMER)Titanium monocarbide TiC is very hard, stable both at high and low temperatures and relatively easy to synthesize from its constituent elements by SHS. Nevertheless, it is difficult to use, as alloying element, in the reinforcement of steels manufactured by liquid metallurgy due to its low wettability by molten steel. To achieve this purpose and due to its better wettability, it is more appropriate to use a master alloy formed by the complex carbide (TiMo)C bonded in Fe. The simplest and most economic way to fabricate such a master alloy Fe(TiMo)C is, again, by SHS, with the added advantage that it can be manufactured using the commercial ferroalloys FeTi and FeMo instead of the individual elements Fe, Ti and Mo. In this work, we describe such a process as well as the characteristics of the master alloy obtained.Item The use of new essay techniques to investigate the behaviour of austenitic steels with nano-alloys(World Foundry Organization, 2014) Caballero, P.; García, J. C.; PROMETAL; CIRMETALThe search for new applications of austenitic steel obliges us to develop new essay techniques which accept the addition of new nanoalloys and allow comparison with standard steels. The new essay techniques must facilitate the study of alterations, segregations and carbides in experimental nanoalloys. New applications will require new micro and macro structural characteristics; however, as the basic austenitic steel structure cannot be radically changed, obtaining improved mechanical properties is the challenge. Future uses of austenitic steel, due to its critical nature in diverse areas such as the aerospace industry and the electromagnetic sector, will require stringent controls. In order to meet these demands, new essay techniques are required. The successful development of new alloys depends on finding the correct element proportions and grain size of the nanoalloys to be added. Through the precise management of the basic steel and nano element mix, beneficial segregations, in both mechanical and rheological terms, can be produced for current and new applications. Thanks to its low cost and probable future use in a wide range of applications, our trials were conducted with manganese steel which was found to be a representative reference type for austenitic steel in general. Using X-ray diffractometry and cyclical fatigue, we have been able to demonstrate that each nano element can be assigned a specific residual tension. Based on this we have produced a table of mechanical properties by nano type which shows the effect of nano addition on the residual tension of the cast steel produced, and, consequently, on the mechanical properties of the experimental alloys. This allows the identification of the most appropriate alloy for both highly specific future and conventional applications of austenitic steels.