The microstructure of bearing metals

Microstructure of Ultrafine- Grained Metals after Ecap

This paper was aimed at verification of functionality of the ECAP technology at extrusion of the copper, alluminium alloys and steel. Experiments were made on equipment, which is demonstrated in the Fig 1. Deformation forces were measured during extrusion, resistance to deformation was calculated and deformation speed was determined approximately. Analysis of structure was made with use of ligh...

Microstructure Study of Laser Surface Cladding of Bearing Materials

The Effect of Damping and Stiffness of Bearing on the Natural Frequencies of Rotor-bearing System

In this paper, the effectiveness of stiffness and damping of bearing is investigated on the natural frequencies of the rotor-bearing system. The rotor-bearing system consists of a shaft, two bearings and a disk between two bearings. Parallel spring-damper in horizental and vertical directions is considered for modeling the stiffness and damping of bearings. The gyroscopic effect is also conside...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

The Effect of Cross Rolling on the Microstructure of Ferrous and Non-ferrous Metals and Alloys

A.B. Naizabekov, S.N. Lezhnev, Rudny Industrial Institute, Rudny, Kazakhstan; H. Dyja, T. Bajor, Czestochowa University of Technology, Czestochowa, Poland; K. Tsay, Institute of Nuclear Physics of the National Nuclear Center of the Republic of Kazakhstan, Almaty, Kazakhstan; A. Arbuz, N.Gusseynov, R. Nemkaeva Al-Farabi Kazakh National University, Almaty, Kazakhstan The cross rolling is the one ...