Preliminary experimental research on friction characteristics of a thick gravitational casted babbit layer on steel substrate

7th International Conference on Advanced Concepts in Mechanical Engineering

Paleu, V.^1 ; Georgescu, S.^2 ; Baciu, C.^2 ; Istrate, B.^1 ; Baciu, E.R.^3

Mechanical Engineering Faculty, Technical University of Iasi, Romania^1

Materials Science and Engineering Faculty, Technical University of Iasi, Romania^2

University of Medicine and Pharmacy Gr. T. Popa, Iasi, Romania^3

关键词: Antifriction materials;    Catastrophic failures;    Different speed;    Experimental research;    Friction characteristics;    Friction coefficients;    Tribological pairs;    Wear intensities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012028/pdf
DOI  :  10.1088/1757-899X/147/1/012028

来源: IOP

【 摘 要 】

The ability of the antifriction materials to withstand with no lubrication for a while can be a solution for the catastrophic failure of automotive journal bearings from the internal combustion engines in accidental breakdown of the oil pump. A thick layer of antifriction material (babbit) was deposited by gravitational casting on a steel disk substrate. Four tribological disk samples coated with babbit are tested against a steel shoe on Amsler tribometer at different speeds and loads in dry friction. The values of the friction coefficient versus speed and load are presented, the obtained results indicating a mild wear regime, recommending the new babbit as a possible coating for the bushes of the journal bearings in automotive internal combustion engines. Further tests must be dedicated to the establishment of the wear intensity of the steel shoe - babbit disk tribological pair, both for motor oil lubricated and dry friction conditions.