Investigationof hardness of tillage tools being hardened by carbo-vibro-arc method with paste application
Автор: Kolomeichenko A.V., Titov N.V.
Журнал: Вестник аграрной науки @vestnikogau
Статья в выпуске: 6 (51), 2014 года.
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The article presents the description of innovative method of hardening of tillage tools, operated in abrasive medium that allows increasing their operating life considerably. It is performed by carbo-vibro-arc surfacing of working bodies using composite metal ceramic pastes with simultaneous thermodiffusion hardening of basic metal of the working body. With application of computerized microhardness tester CMT-1 according to Vickers method the working bodies hardening being hardened by pastes containing aluminum oxide, silicon dioxide, boron carbide, ammonium nitrate is defined. Analysis of the data obtained proved that with the increase of percentage content of ceramic components in paste from 10% to 30% microhardness of the surfaced coating also increases regardless the used ceramic component. At the same time the maximum average value of microhardness of the surfaced coating (75 HRC) were showed by the working bodies being surfaced with the paste containing 30% of boron carbide В 4С. Pastes containing 30% of aluminum oxide Al 2O 3 and silicone dioxide SiO 2, were characterized by lower values of coatings microhardness - 69 HRC and 67 HRC correspondingly. With application of pastes containing ammonium nitrate NH 4NO 3, the obtained coatings have the minimum hardness 62 HRC. The optimal content and concentration of paste components that provide increase of wear resistance of the hardened working bodies on the average by 1,8…2,0 times are determined according to the results the carried out tests.
Carbo-vibro-arc hardening, metal ceramic material, working element, paste, thermodiffusion hardening, ceramic components, nitrogenous components, graphite electrode
Короткий адрес: https://sciup.org/147124215
IDR: 147124215
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