The paper attempts to summarize the salient points in our present-day understanding of the mechanism of extreme-pressure action. To illustrate advances in the knowledge in this field, certain facts will be highlighted.
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References
1.
GodfreyD. ‘Chemical changes in steel surfaces during extreme-pressure lubrication’, ASLE Trans.19625, 57.
2.
VinogradovG. V. et al. ‘Investigation of the lubrication process under heavy friction conditions’, Wear19636, 202.
3.
BaberB. B.LawlerC. W.SmithH. R.BeaneG. A.KuP. M. ‘Gear lubrication in inert gas atmospheres’, ASLE Trans.19603, 142.
4.
BuckleyD. H.SwikertM.JohnsonR. L. ‘Friction, wear and evaporation rates of various materials in vacuum to 10–7 mmHg’, ASLE Trans.19625 (No. 1), 8.
5.
ArchardJ. F.HatcherB. G.KirkM. T. ‘Some experiments upon the behaviour of hypoid oils in heavily loaded contacts’, Lubric. and Wear Second Conv., Proc. Instn mech. Engrs1963–64178 (Pt 3N), 258.
6.
CampbellR. B.MacdonaldD. ‘The detection of oil films between hypoid gear teeth using contact-resistance measurements’, J. Inst. Petrol.196147, 365.
7.
AllenC. M.DrauglisE. ‘Boundary layer lubrication: Monolayer or multilayer’, Wear196914, 363.
8.
AskwithT. C.CrouchR. F.CameronA. ‘The relationship of molecular chain length of lubricants and additives for optimum effect; and a theory of scuffing’, Lubric. Conf., Brighton1964 (October) (Inst. Petrol., London).
9.
LoeserE. H.WisquistR. C.TwissS. B. ‘Cam and tappet lubrication—radioactive study of sulfur in the e. p. film’, ASLE Trans.19591, 199.
10.
ElliottJ. S.HitchcockN. E. F.EdwardsE. D. ‘Hypoid gear lubricants and additives’, J. Inst. Petrol.195945, 219.
11.
AllumK. G.FordJ. F. ‘The influence of chemical structure on the load-carrying properties of certain organosulphur compounds’, J. Inst. Petrol.196551 (No. 497), 145.
12.
AllumK. G.ForbesE. S. ‘The load-carrying properties of organic sulphur compounds. Part II—The influence of chemical structure on the anti-wear properties of organic disulphides’, J. Inst. Petrol.196753 (No. 521), 173.
13.
BarcroftF. T.DanielS. G. ‘Extreme-pressure film formation on hypoid gears, studies with sulphur-35’, Conv. Lubric. and Wear, Proc. Instn mech. Engrs1964–65179 (Pt 3J), 265.
14.
LlopisJ.GamboaJ. M.ArizmendiL.GomezMinana J. A. ‘Surface reaction of iron with thio- and phosphorus-organic compounds dissolved in hydrocarbons’, AD4123571963 (U. S. Dept of Commerce, Office of Tech. Services).
15.
KlausE. E.BieberH. E. ‘Effects of P32 impurities on the behaviour of tricresyl phosphate-32 as an antiwear additive’, ASLE Trans.19658, 12.
16.
BarcroftF. T.DanielS. G. ‘The action of neutral organic phosphates as e. p. additives’, J. bas. Engng1965; A. S. M. E. Paper No. 64-Lub-22.
17.
GodfreyD. ‘The lubrication mechanism of tricresyl phosphate on steel’, ASLE Trans.19658.
