A study has been made to evaluate wear behavior of AISI 52100 steel under different quenching media. This investigation was accomplished by two stages. In the first stage of the study , quenching treatment was applied to the steel alloy and then cooling was carried out in various media (Oil , Polyvinyl Alcohol , Glycerol), and finally low temperature tempering (200C o ) was applied to the quenched samples to eliminate internal stresses after transformation from austenization temperature to the temperature which the samples were cooled. Microstructural examination was achieve using light microscopic for all heat treated specimens after metallographic preparations . In the second stage , pin -on -disk technique was used to determine the wear rate of the treated specimens depending on weight loss method . Worn surfaces of the steels were examined using light microscopic to characterize the topography of the surfaces.The results exhibited that (i) Martensitic matrices with retained austenite can be obtained depending on the quenching medium . (ii) Chromium carbides have been precipitated as a result of quenching heat treatment in different quenchants . (iii) Quenching in oil and then tempering revealed wear resistance more than other quenchants . (iv) wear cracks were presented on the worn surfaces of the steels which was used in this work .

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This paper presents the experimental and numerical analysis of the effect of roughness parameters on the hardening of a 148 mm x 148 mm cast steel plate. The temperature distribution on the plate surface was measured at various points, and the infabstractrared (IR) camera was used to capture infrared images during the cooling process. In this study, the temperature distribution on the plate surface was evaluated at each pixel image, and the data was collected and recorded using the Therma CAM researcher 2001 software. The results show that the cooling rates on the smooth and rough sides were significantly high at 500 C. Also, it has been found that the total amount of energy is constant over the entire thickness of the sample

The method for constructing functions with finite support is used, which combines the properties of FEM functions and approximations in the form of series with unknown coefficients. To illustrate the properties of the approximating function constructed, we present the results of the solution of the 2D theory of elasticity for a thin plate, shown on figure 1,b. The thickness of the plate is h. One facet of the plate (at x = −a) is fixed and the other one (at x = − a) unfixed; the remaining two are under shear stresses τ and an evenly distributed load θ. The solution of the problem of determining the stress and strain in the plate can be obtained from the steady-state condition of the Lagrange functional by using the functions of class C0 of the high-degree approximation for scientific calculations. The calculations show that the obtained solution has high accuracy, even in cases when the length of the rectangular domain is considerably greater than its width.