Fricción y desgaste en elementos circulares empleados en pasadores // Friction and waste in elements circular employees in pins.

Authors

  • D. Alcántara-Borges Instituto Superior Minero Metalúrgico de Moa. Las Coloradas s/n, Moa, Holguín. CP 83 329. Cuba. Teléfono: 53 24 6 4476. Fax: 53 24 6 2290
  • T. Fernández-Columbié Instituto Superior Minero Metalúrgico de Moa. Las Coloradas s/n, Moa, Holguín. CP 83 329. Cuba. Teléfono: 53 24 6 4476. Fax: 53 24 6 2290
  • I. Rodríguez-González Instituto Superior Minero Metalúrgico de Moa. Las Coloradas s/n, Moa, Holguín. CP 83 329. Cuba. Teléfono: 53 24 6 4476. Fax: 53 24 6 2290

Abstract

El presente trabajo tiene como objetivo establecer el comportamiento de los pasadores fabricados
de acero 45 empleados en las esteras de los equipos de laboreo minero, los cuales por su condición
de trabajo, se desgastan prematuramente producto de la fricción por rodadura, pero que a la vez,
este fenómeno trae consigo el endurecimiento superficial de las capas tratadas térmicamente. Para
dar cumplimiento al objetivo se utilizaron probetas de los elementos antes de su puesta en marcha
y retirado después de su función. Fueron preparadas probetas de 30 x 30 mm cortadas con
abundante refrigeración para comprobar su composición química con el empleo del espectrómetro
cuántico de masa y su dureza inicial y final, así como probetas de 15 x 15 mm para el análisis
microestructural. Se establece el comportamiento de la estructura cristalográfica del pasador
tratado térmicamente antes de ser sometido a carga y la estructura después del período de vida
útil. También con el trabajo se demuestra el endurecimiento del acero por acritud cuando el
material es sometido a la fricción por rodadura.


Palabras claves: pasadores, fricción, rodadura, análisis microestructural, endurecimiento superficial.

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Abstract
The present work has as objective to establish the behaviour of the fabricated pins of steel grade 45
used in the mats of mining equipment. Due to its working condition, these pieces prematurely wear
away because of the rolling friction. At the same time, this phenomenon produce a superficial
hardening of the outside layers thermally heat treated. To accomplish this aim some samples of
non-used tubes and some used for a period of time were compared. Samples of 30 x 30 mm, cut
with abundant refrigeration, were used for chemical analysis with the employment of a mass
quantum spectrometer. The initial and final hardness of the different samples were also measured.
Samples of 15 x 15 mm were used for microstructure analysis. The microstructure of heat treated
pins before being subjected lo load and after a period of load were studied. In the research results
it is also confirmed the pin hardening due to rolling friction.


Key words: aolling, analysis microestructural, superficial hardening.

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How to Cite

1.
Alcántara-Borges D, Fernández-Columbié T, Rodríguez-González I. Fricción y desgaste en elementos circulares empleados en pasadores // Friction and waste in elements circular employees in pins. Ing. Mec. [Internet]. 2009 May 1 [cited 2025 Sep. 13];12(2):49-58. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/66

Issue

Vol. 12 No. 2 (2009): may-august

Section

Original article

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