Papers by Keyword: Manganese Steel

Paper TitlePage

Authors: J.L. Wang, H.F. Wang, L. Pang
Abstract: The corrosion property of the cast manganese steel by shock excitation and rotation method was done by the corrosion experiment. The experiment showed the corrosion resistance of the cast manganese steel by shock excitation and rotation method was better than that of the cast manganese steel by traditional casting technology. In addition, the experiment results showed that corrosion weightlessness was increased with the time increasing. In twenty-four hours, the corrosion of the casting manganese steel could not very serious with the time increasing, but exceeding twenty-four hours, the corrosion degree of the casting manganese steel would increase with the time increasing.
9
Authors: J.L. Wang, H.F. Wang, L. Pang
Abstract: The casting machine of the shock excitation and rotation comprehensive effect was obtained by the improvement on the basis of the traditional casting technology. Mine manganese steel hammer was cast by the casting machine of the shock excitation and rotation comprehensive effect. The manganese steel hammer was analyzed by the microstructure and wear resistance. The casting mechanism of the casting machine of the shock excitation and rotation comprehensive effect was further discussed. The experiment result showed the cast manganese steel by the shock excitation and rotation method had the advantages of the grain fine and uniform, good wear resistance. Comparing to the traditional technology, the new casting technology could extend the service life of the casting manganese steel.
63
Authors: Angel Varela, Ana García, José Luís Mier, Ramón Artiaga, Fernando Barbadillo, L. García
1547
Authors: Sri Harjanto, Yudha Pratesa, Bambang Suharno, Junaidi Syarif
Abstract: Fe-Mn alloys are prospective degradable materials for coronary stents. Several methods and strategies are investigated to produce excellence properties for this application, such as addition of alloying elements. The study is focused on the corrosion behavior of novel Fe-Mn alloys, i.e. Fe-25Mn-1C and Fe-35Mn-1C fabricated by powder metallurgy process. Addition of carbon is intended to obtain the phase that has ability to easily degradable without compromising its mechanical properties. The results show that austenite phase formed from this process and corrosion rate increased in proportion with the manganese addition from 32.2 mpy (Fe-25Mn-1C) to 43.7 mpy (Fe-35Mn-1C) using polarization methods. The presence of porosity, which cannot be extinguished by sintering, makes the degradation favorable. The results of this study indicate that these alloys have prospective properties to be applied as degradable biomaterials.
386
Authors: Adam Grajcar, Roman Kuziak
Abstract: Two 0.17C-3Mn-1.5Al-0.2Si-0.2Mo steels with and without Nb microaddition were melted in a vacuum induction furnace. The steels are characterized by bainitic-martensitic structures with large fraction of retained austenite. To design a thermomechanical treatment for steels with required multiphase structures a knowledge of their hot deformation resistance and softening kinetics is of primary importance. The paper presents the results of the compression tests carried out at various temperatures and strain rates using the Gleeble simulator. A softening kinetics was determined in a double-hit compression test. It was found that the dynamic recrystallization was a process controlling work hardening of steels except for hot deformation conditions characterized by the highest Zener-Hollomon parameter values. Nb microalloyed steel has higher flow stresses and peak strains than the steel without Nb. A solute drag effect of niobium results also in a slower recrystallization kinetics for the Nb containing steel.
330
Authors: S.H. Khan, Aamer Nusair Khan, K. Mahmood
Abstract: An investigation was conducted to explore the applicability of eddy current nondestructive evaluation technique for the characterization of manganese steels. Specimens of two different types of manganese steels were subjected to various compression loads. The specimens were then evaluated by mechanical and eddy current testing. The hardness and eddy current values were increased due to conversion of austenite to martensite. In this study the correlation between eddy current parameters and compression load was discussed.
316
Authors: Adam Grajcar, Sabina Lesz
Abstract: The present study is a first step of a project to obtain thermo-mechanically processed fine-grained increased Mn content TRIP steels with large fractions of retained austenite. Two 0.17C-3Mn-1.6Al-0.2Si-0.2Mo steels with and without Nb microaddition were produced in a vacuum induction furnace. The influence of Nb microaddition on a macrostructure, a grain size and hot-working behavior were examined. The steels are characterized by a slight macrosegregation of Al in the as-cast state, minimized for a Nb-microalloyed steel. After hot forging refined bainitic-martensitic structures with large fractions of γ phase obtained. The steel microalloyed with Nb has finer granules of retained austenite at comparable fractions of this phase. The force-energetic parameters of hot-working were determined in an uniaxial hot-compression test at temperatures of 1150 and 950°C and strain rates from 0.1 to 10s-1. The Gleeble 3800 thermomechanical simulator was used. The hot-working behaviour of the investigated steels is challenging because of higher flow stresses and εmax strains compared to conventional TRIP steels with lower Mn contents.
2124
Authors: Marcela Selecká, Andrej Šalak, Dagmar Jakubéczyová
Abstract: The effect of three iron powder grades and three manganese carrier types on mechanical and tribological characteristics of sintered 1 -5% Mn steels was investigated. The different effect of iron powder grades in dependence on manganese addition expressed oneself in strength and in wear. The highest strength and highest wear attained the steels with 3% Mn added as high carbon ferromanganese. The components – rollers - prepared from manganese steel exhibited lower wear than that from Fe-4Ni-1.5Cu-0.5Mo powder. The gears for hydrogenerator prepared from Fe-3.5Mn-0.5Mo-0.3C steel exhibited longer life time at increased oil pressure compared with that from through hardened sintered Fe-4Ni-1C steel.
59
Authors: Adam Grajcar, Roman Kuziak
Abstract: Two 5Mn-1.5Al TRIP steels with and without Nb microaddition were developed in the present study. The steels contain bainite, martensite, interlath retained austenite and martensite- austenite islands. The paper presents the results of the compression tests carried out at various temperatures using the Gleeble simulator. To analyze the kinetics of static recrystallization in these steels, a softening kinetics were determined in a double-hit compression test. It was found that the dynamic recovery is a main thermally activated process occurring during hot deformation. The Nb microalloyed steel has higher flow stresses and peak strains than the Nb-free steel. A solute drag effect of Nb results in a slower softening kinetics of Nb containing steel. The effects of Mn on the retardation of Nb(C,N) precipitation and hot deformation characteristics are also discussed.
119
Showing 1 to 9 of 9 Paper Titles