Structural Changes in the Superficial Layers of a Non-conventional Treated Steel Subjected to a Wear Process

Abstract

It was considered a non - conventional treatment in magnetic field applied before the thermo-chemical treatment (nitro-carburizing in plasma), for one alloyed steel which is used in Machinery building industry. These researches have been made in order to improve the mechanical properties of Chromium-Molybdenum alloyed steel non-conventionally treated in a magnetic field. Through the thermo-magnetic treatment, applied before the plasma nitro-carburizing, the mechanical properties of this material have been improved, especially in this case of the steel with a considered content of Chromium (1.38%). These researches, through X-Ray diffractometry of the behavior of the superficial layers during the dry wear process, completed this work. The diffractometric characteristics of the superficial layers which have been obtained after a complex system of thermo-magnetic treatments followed by a thermo-chemical treatment, the superficial layers content and the behavior of the steel at the wear through dry friction tests were used as criterion. The paper is a review of the researches from the last few years.

Tribological Evolution of the Superficial Layer and the Effects of the Magnetic Field to a Non- conventional Treated Steel, During Wear Tests

“…Figure 1a presents the diffractometric aspects in the case of classic treatment (T1). Figures 1b and 1c presents the diffractometric aspects in the case of nonconventional treatments (T2 and T3), before the wear tests [22,23]. In figure 1d, the Feα (M) quantity increased, after three hours of wear tests, compared with the initial state presented in figure 1b.…”

The Influence of the Manufacturing Method on the Structure and Magnetic Properties of Rapid Cooled Iron Based Alloys

“…As the date of the creation of a completely new group of amorphous materials is considered 1989 when A. Inoue from University of Tohoku proposed Tyree empirical criteria giving the possibility of repeatability in the production of amorphous alloys with thicknesses far beyond the capabilities of earlier methods. Such materials are called massive amorphous materials [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Evolution of the Plasticity of Some Low Carbon Steels, Subjected to Directed Cooling from High-temperature

“…If we study the literature [1,[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] for steels with 0.1% C, 0.48% Mn, 0.24% Si, the microstructural parameters which determine the mechanical properties of the steels are the sizes and the shape of pearlitic (P) and ferritic (F) grains which form its microstructure. Ferrite has a low mechanical * email: euroinvent@yahoo.com strength but it has plastic properties.…”