Strengthening of cultivator paws with electrospark doping
2019
Strebkov, S., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Slobodyuk, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Bondarev, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Sakhnov, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation)
Currently, a serious increase in the reliability of structural elements allows manufacturers of equipment to routinely reduce the durability of individual elements to increase the level of sales. Maintainability is provided not by the constructive and technological capabilities of detecting and eliminating the failure by methods of repair and restoration, but by replacing with new parts. The main strategy of the dealer network to make a profit is determined by the sale of consumables and spare parts. Debugged in mass production manufacturing technology with a minimum cost does not provide modern methods of hardening in order to increase the durability of parts. It is a fact, that the farmers’ interests are ignored in reducing the operating costs, including the cost of replacing the working bodies of the tillage machines. An increase in the resource can be achieved by controlling the process of wear by increasing the wear resistance. A way to increase durability is to strengthen the working edges of the working bodies of tillage machines during operation. This goal can be achieved by electrospark doping (ESD). As a strengthening technology, it is an economically viable and technologically promising solution for the possibility of increasing the resource. When performing the work, the following tasks were solved: (1) development of a technology for obtaining wear-resistant coatings on the surfaces of lancet paws with improved performance properties; (2) rationale for the choice of the material of the alloying electrode; (3) carrying out operational evaluation of increase of the service life of the processed working bodies of soil-cultivating machines. Electric-spark hardening was performed with three materials: R5М6 (high speed steel), terminal electrode T-590 (an alloy of iron resistant to abrasive wear) and T15K6 (alloy of cobalt and carbides of titanium and tungsten). In conclusion, it should be noted that the best electrode material for hardening is the electrode rod T-590, which will reduce the wear rate by weight and the linear parameters three times in comparison with the untreated paws.
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