A.K., Gupta and D. M. , JESUDAS and P.K., Das and K., Basu (2004) Performance Evaluation of different Types of Steel for Duck Foot Sweep Application. Biosystems engineering , 88. pp. 63-74. ISSN 1537-5110

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Abstract

Field trials were carried out with an agricultural implement used for secondary soil manipulation and equipped with tines known as duck foot sweeps. The tines were fabricated out of various types of steel such as leaf spring steel (En47) (both from automobile strip indicated as 'used En47' and heat-treated virgin steel), En8, Enl9, En24 and mild steel (En3) with and without case carburisation. The trials were conducted on rainfed fallow, black cotton soil to a depth of 15 cm at a tractor speed of 1.03 m/s for cultivation time of 30 h. The performance of these experimental sweeps was evaluated and compared with commercially available sweeps made out of mild steel (En3), which were used as the control' for the performance evaluation. Microstructures and mechanical properties of the steel in heat-treated and in 'as-received' condition were also evaluated to establish the criteria of their performance for facilitating selection of appropriate materials for manufacture. The weight loss during the 30 h field test and the profiles of worn-out cutting edges have been considered as measures of wear and hence, performance criteria for the sweeps. The 30 h field trial revealed that the weight loss was minimal (18 g) in heat-treated Enl9 in comparison with all the other grades of steel used. The maximum weight loss observed in the experimental sweeps was 29 g in the case of carburised mild steel (En3), whereas the weight loss was 72 g in the control sweep made of mild steel (En3) and 61 g in used En47 made from 'as-received' automobile leaf steel. To ascertain the required mechanical properties, the tillage forces on the sweep were also measured using a triaxial tillage dynamometer at three different tractor cultivating speeds viz. 0.33, 0.88, 1.03m/s under similar soil conditions. The horizontal draught force was observed to be in the range of 2.5-4.5 kN and vertical draught force was 2.9-6.4 kN at the cultivating speed of 1.03m/s and 15 cm depth. All the sweeps were found to have sufficient strength to withstand such high tillage forces.

Item Type:	Article
Subjects:	Lightweight Materials
Divisions:	UNSPECIFIED
Depositing User:	Mr. B.K. Prasad
Date Deposited:	01 Oct 2013 11:47
Last Modified:	01 Oct 2013 11:47
URI:	http://ampri.csircentral.net/id/eprint/636

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