Open AccessINFLUENCE OF ROUGHNESS ON THE TRIBOLOGICAL BEHAVIOR OF A STEEL-STEEL COUPLE LUBRICATED WITH THREAD COMPOUND
Author(s) -
Nicolás Ariel Zabala,
Pablo A. Castro,
Walter Roberto Tuckart
Publication year - 2019
Publication title -
latin american applied research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 23
eISSN - 1851-8796
pISSN - 0327-0793
DOI - 10.52292/j.laar.2019.360
Subject(s) - lubricant , thread (computing) , materials science , tribology , surface roughness , casing , metallurgy , surface finish , composite material , graphite , mechanical engineering , engineering
The purpose of this study is to determinate the influence of surface roughness on the tribological behavior of a lubricated steel against steel tribosystem. Tests were carried out at high pressure and slow sliding speed, in order to simulate at small scale, the contact conditions found in the seal of the threaded joints used in oil & gas casing and tubing strings. Tests were carried out with a simplified block-onring test, varying the surface roughness of rings between 1.3 to 3 m Ra values. A thread compound lubricant containing lead, copper, zinc and graphite was used. During each cycle of test, the normal load was varied linearly between 250 N and 7000 N. An exponential correlation between Ra and Rt roughness values with the wear damage was found and the wear damage of the blocks decreases about 40 percent with the increasing of initial Ra roughness parameter in the movil surface.