Studies Regarding the Influence of Boron Addition on the Hardness and Friction Coefficient of the Mn, Mo and Cr Ecological Alloyed Sintered Steels
Journal Title: RECENT - Year 2011, Vol 12, Issue 33
Abstract
In this paper are presented the experimental results regarding the elaboration of the Fe-Mn-Mo-Cr-B-Graphite and Fe-Mn-Mo-Cr-Graphite ecological alloyed sintered steels. There have been produced mixes containing 3% Mn, 1%Mo, 1.5%Cr, 0.5%B, 0.45Grafit and Fe which were exposed to the process of Mechanical Alloying (MA) for 20, 40, and 60 hours. The mixtures were pressed in a cylindrical die at three pressures (600,700 and 800 MPa), after that the green densities were calculated. The compacts were sintered in a furnace with protective atmosphere (Ar) at different temperatures (1050, 1100 and 1150 °C) and the dwell time was 120 minutes. The samples obtained after sintering treatment were investigated by optical and electronic microscopy. The mechanical properties such as hardness and friction coefficient were studied too. It is observed that high values of hardness (HV0.2) and friction coefficient μ = 0.158 were obtained for the Fe-Mn-Mo-Cr-B-Graphite ecological steels obtained after 60 h of mechanically alloying, pressed at 800 MPa and sintered at 1150 [sup]o[/sup]C.
Authors and Affiliations
Ionela BUCŞE, Adela IONESCU, Claudiu NICOLICESCU, Jeni GHERCIOIU
Keywords
Related Articles
- EP ID EP86056
- DOI -
- Views 125
- Downloads 0
Evolution of the Solid Fraction at the Solidification of a 0.1 %C Steel
To achieve mathematical models and software for solidification simulation casted pieces it is necessary to know the fraction of the solid variation at solidification. In the case of the alloys form solid solution by soli...
Analysis of the Performance Criteria of Optoelectronic Systems
Analysing the results of the case study, I believe that the optimal choice optoelectronic systems is very important to determine and rank the performance criteria according to their contribution to fulfilling the mission...
Robot Collision Avoidance Using Programming through Imitation
This paper deals with the collision avoidance of the cooperative robots using the programming through imitation. Each physical robot acts fully independently, communicating with corresponding virtual prototype and imitat...
Practical Study of the Influence of Load Flow on the Cylindrical and Polygonal Sieves
Experimental research has established conditions under which one sieve can achieve optimum volumetric ranking efficiency. A direct influence in terms of efficiency of these machines has the material load flow in the siev...
Aspects Regarding Simulation with Cylindrical Coordinates of Solidification Casting
Specialized software for solidification simulation of casting with rotational symmetry was conducted at the Transilvania University of Brasov. It is based on a 2D finite difference mathematical model with cylindrical coo...