The repetitive impact wear of steels for hydro-powered mining machinery

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dc.contributor.advisorAllen, Colinen_ZA
dc.contributor.advisorBall, Anthonyen_ZA
dc.contributor.authorFricke, Rolanden_ZA
dc.date.accessioned2016-03-28T14:21:25Z
dc.date.available2016-03-28T14:21:25Z
dc.date.issued1991en_ZA
dc.description.abstractThe repetitive impacting of solid components in industry can result in wear damage which may significantly limit service life. Impact wear problems have been encountered in hydro-powered stoping equipment (eg rockdrills and impact rockbreakers) developed for deep level gold mining in South Africa. This research project was a study of the repetitive impact wear of reciprocating valve components (eg poppet valves within the impact rockbreaker) under simulated conditions. A laboratory apparatus, capable of producing impacts varying in energy from 2 - 5 J and varying in frequency from 5 - 50 Hz in an aqueous environment (distilled water), was designed and built for this purpose. Impact tests were conducted in order to: a) rank materials according to impact wear resistance, b) to determine modes and mechanisms of wear, c) to determine material, microstructural, design and operating parameters of importance in minimising wear, d) to make recommendations concerning the above, to facilitate productivity and longlife of poppet valves within impact rockbreakers. The materials selected for testing (817M40, 1210 and AISI 304, AISI 431 and AISI 440C) are steels currently used by the gold mining industry in different applications and known to perform satisfactorily in service. These materials are not all ideally suited to application in valves. They were chosen in order to illustrate how different steel compositions, microstructures and heat treatments influence the rate and mode of wear.en_ZA
dc.identifier.apacitationFricke, R. (1991). <i>The repetitive impact wear of steels for hydro-powered mining machinery</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/18214en_ZA
dc.identifier.chicagocitationFricke, Roland. <i>"The repetitive impact wear of steels for hydro-powered mining machinery."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1991. http://hdl.handle.net/11427/18214en_ZA
dc.identifier.citationFricke, R. 1991. The repetitive impact wear of steels for hydro-powered mining machinery. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Fricke, Roland AB - The repetitive impacting of solid components in industry can result in wear damage which may significantly limit service life. Impact wear problems have been encountered in hydro-powered stoping equipment (eg rockdrills and impact rockbreakers) developed for deep level gold mining in South Africa. This research project was a study of the repetitive impact wear of reciprocating valve components (eg poppet valves within the impact rockbreaker) under simulated conditions. A laboratory apparatus, capable of producing impacts varying in energy from 2 - 5 J and varying in frequency from 5 - 50 Hz in an aqueous environment (distilled water), was designed and built for this purpose. Impact tests were conducted in order to: a) rank materials according to impact wear resistance, b) to determine modes and mechanisms of wear, c) to determine material, microstructural, design and operating parameters of importance in minimising wear, d) to make recommendations concerning the above, to facilitate productivity and longlife of poppet valves within impact rockbreakers. The materials selected for testing (817M40, 1210 and AISI 304, AISI 431 and AISI 440C) are steels currently used by the gold mining industry in different applications and known to perform satisfactorily in service. These materials are not all ideally suited to application in valves. They were chosen in order to illustrate how different steel compositions, microstructures and heat treatments influence the rate and mode of wear. DA - 1991 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1991 T1 - The repetitive impact wear of steels for hydro-powered mining machinery TI - The repetitive impact wear of steels for hydro-powered mining machinery UR - http://hdl.handle.net/11427/18214 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18214
dc.identifier.vancouvercitationFricke R. The repetitive impact wear of steels for hydro-powered mining machinery. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18214en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Materials Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMaterials Engineeringen_ZA
dc.titleThe repetitive impact wear of steels for hydro-powered mining machineryen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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