Accession Number : AD0270524

Title :   AN INVESTIGATION OF THE FATIGUE BEHAVIOR OF MATERIALS FOR LARGE BALL BEARINGS

Corporate Author : ALLOY ENGINEERING AND CASTING CO CHAMPAIGN ILL

Personal Author(s) : REICHENBACH,G.S. ; RUSSELL,P.G.

Report Date : 01 AUG 1961

Pagination or Media Count : 1

Abstract : An investigation was made to develop the optimum heat treatments for materials in use, or proposed for use, in radar antennae bearings and to develop rolling fatigue data as a function of ball size and stress. The materials under study are steel types 52100, M-2, M-50 and 440C. Elastic limit, hardness and retained austenite determinations were made for each steel as a function of tempering temperature. A heat treatment giving optimum strength and stability properties was determined for each steel. The hardening characteristics of M-2 were determined on both a 4.5and a 7-in. cube. Rolling fatigue tests were run in a modified Barwell tester on (1/2-, 1- and 1-1/2-in.-diam) balls of standard 52100. A rolling contact, 4-ball tester for fatigue testing of 3-to 8-in balls was designed. Analytical descriptions of the stresses and motions in the 4-ball testers are presented. (Author)

Descriptors :   *BALL BEARINGS, *FATIGUE (MECHANICS), *RADAR ANTENNAS, *STEEL, AUSTENITE, FRICTION, HARDNESS, HEAT TREATMENT, MATERIALS, STRESSES, TEST METHODS

Distribution Statement : APPROVED FOR PUBLIC RELEASE