Boundary lubrication of sliding concentrated steel contacts
article
Boundary lubrication and wear of slow-moving concentrated (point and line) contacts of hardened steel have been studied as a function of geometry, load (stress condition), speed, composition and temperature of the lubricant, composition of the steel and oxygen content of the surrounding atmosphere. Both in lightly stressed line contacts and in heavily stressed point contacts, an initial amount of metallic wear occurs. Depending on the surface temperature in the contact zone, this can have a moderate character (i.e. adhesive wear, mitigated by the presence of physically adsorbed boundary films) or a severe, adhesive character. In heavily loaded point contacts adhesive wear is accompanied by fatigue. In both contact situations and irrespective of the temperature in the contact zone the metallic wear period is terminated by the formation of protective films, either by oxidation or by reaction with chemically active components from the lubricant. The controlling factor in the oxidation mechanism is the rate of oxygen supply. © 1972.
TNO Identifier
280789
ISSN
00431648
Source
Wear, 22(3), pp. 337-357.
Pages
337-357
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