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vol.77 número162BIOGENIC CRYSTALS OF MAGNETOCOCCUS FROM LA FE DAM AND CALIMA LAKE (COLOMBIA)EVALUATION OF TRIBOLOGICAL AND MECHANICAL PROPERTIES OF CrC COATINGS DEPOSITED BY R.F. MAGNETRON SPUTTERING índice de autoresíndice de assuntospesquisa de artigos
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DYNA

versão impressa ISSN 0012-7353

Resumo

PEREZ G., WILMER; GONZALEZ, HUGO  e  TORO, ALEJANDRO. ABRASIVE WEAR OF ROTARY PLOW BLADES IN A SANDY LOAMS SOIL. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.162, pp.105-114. ISSN 0012-7353.

The wear rate of rotary plow blades was related to the tool speed in field tests. The experiments were performed at Paysandú Farming Center (Santa Elena, Medellin, in a sandy loam soil). Fixed tractor speed of 2 km/h and working depth of 120 mm were selected. Three rotational speeds were tested, namely 141, 177, 251 rpm which led to average mass losses of 0.67 g, 1.35 g and 2.33 g respectively. Optical and scanning electron microscopes aided to identify the wear mechanisms acting on the surfaces, being abrasion, and specifically micro-cutting, predominant. Also, the abrasive wear resistance of the tools was determined in laboratory according to ASTM G65 standard, procedure A.

Palavras-chave : Rotary plow; tillage; wearing; tribology; blade.

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