Wear characteristics of thermally sprayed rotary tiller blades | |
| Author | Satit Karoonboonyanan |
| Call Number | AIT Thesis no.AE-05-10 |
| Subject(s) | Rotary tillers Agricultural implements |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-05-10 |
| Abstract | Rotary tiller is an agricultural implement, popularly used for saving labour and time in soil preparation. It can also be used to incorporate residue in sugarcane field into the soil to increase the organic matter content. Despite several usage, wear of rotary tiller blades is quite high, especially in sandy soil, which affect its working life. The main objective of this study was to test the effect of coatings and coating techniques on wear characteristics of rotary tiller blades. This study compared five different thermal spray systems, namely, Arc-sprayed Tungsten Carbide/Nickel (WA), Flame-sprayed "tungsten Carbide/Cobalt (WF), High-velocity oxygen-fuel- (HVOF) sprayed Tungsten Carbide: Cobalt (WH), Plasma-sprayed Alumina/Titania and Plasma-sprayed Alumina/Titania with Nickel Aluminium bond coating (APB), on rotary tiller blades. Four-hectare field tests and 40-hour laboratory tests were conducted to evaluate wear characteristics of the coated blades. Average wear rates of the uncoated blades were 6.58 -,/ha in the field and 0.23 g/h in the laboratory. Wear resistance index (WRI), defined as wear rate of the uncoated blade divided by the coated one, were 0.96, 0.60, 9.90, 1.40 and 1.74 in the field and were 0.98, 0.61. 1.28, 1.13 and 1.12 in the laboratory for N VA. WF, WI I, AP and APB blades respectively. WH was the most resistant both in the laboratory and in the field, while WF was the least. AP and APB showed significant resistance in the field but not in the laboratory. WA did not show significant resistance in both tests. Correlation analysis showed that wear resistance of the coated blades in the field could be predicted by the laboratory test, except for WH as its field performance was much higher than the predicted value. Average costs of rotary tiller blades were 10. 46, 642, 19, 3 1, 48 Baht per hectare for the uncoated, WA, WF, WH, AP and APB blades respectively. It was concluded that application of thermal spray for rotary tiller blades was not economical even though one of them. WH, showed very high performance |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-05-10 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Salokhe, Vilas M.;Panadda Niranatlumpong; |
| Examination Committee(s) | Jayasuriya, Hemantha P.W.;Canillas, Emmanuel C.; |
| Scholarship Donor(s) | Royal Thai Government Fellowship and Thailand Graduate Institute of Science and Technology (TGIST), NSTDA; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |