Sökning: "Shot rock"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Shot rock.

  1. 1. Influence of Surface Carbon Content on the Wear of Threaded Connections in Rock Drilling Steels

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Andreas Hälsing; [2023]
    Nyckelord :carbon content; wear performance; carburized steel; dry contact interface; threaded connections; drill rods; samples; shot peening; production process; twin-disc wear tester; RPM; operating conditions; wear rate; surface topography; hardness; optical analysis; light optical microscopy; scanning electron microscopy; surface carbon content; microstructural changes; frictional heat; contact pressure; wear mechanisms; plastic deformation; adhesive scratching; material removal; delamination;

    Sammanfattning : This thesis work was conducted at Luleå University of Technology in collaboration with Sandvik Rock Tools. The aim of the work was to determine the influence of carbon content on the wear performance in carburized steel in the dry contact interface of threaded connections between drill rods. LÄS MER

  3. 2. En jämförande studie mellan diesel- och eldrivna tunneldrivningsmaskiner för masshantering i tunnel

    M1-uppsats, KTH/Byggteknik och design

    Författare :Chanel Semakala; Emre Cömert; [2019]
    Nyckelord :Tunnel construction; Shot rock; Electrically powered; Carbon dioxide emissions; Energy consumption; Costs Truck; Wheel loader; Tunnelbyggnation; Bergmassor; Eldrivet; Koldioxidutsläpp; Energiförbrukning; Kostnader; Lastbil; Hjullastare;

    Sammanfattning : The construction industry is facing a reality where the dependency on fossil fuels needs to cease and be replaced by options that are more climate friendly. One such option is the electrification that has not made a breakthrough in the construction industry yet and therefore needs to be examined. LÄS MER

  4. 3. An Innovative In-Tunnel Seismic Study for Sustainably Extracting Apatite Ore at the Siilinjärvi Mine, Eastern Finland

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Anna Donczew; [2019]
    Nyckelord :in-tunnel seismic; reflection seismic; traveltime tomography; carbonatites; shear zones; Siilinjärvi; tunnelseismik; reflektionsseismik; restidstomografi; karbonatiter; skjuvzoner; Siilinjärvi;

    Sammanfattning : Siilinjärvi located in eastern Finland is presently the only phosphate mine with significant phosphorus production in western Europe. Phosphate rock and phosphorus are known as a critical raw material for the European Union due to their economic importance and being prone to the supply risks. LÄS MER

  5. 4. Effect of Petrophysical Parameters on Seismic Waveform Signatures : Review of Theory with Case Study from Frigg Delta Oil Field, Norway

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :Gardar Gislason; [2016]
    Nyckelord :AVO; poroelasticity; AVFO; WIFF; seismic attenuation; seismic dispersion; AVO; poroelasticitet; AVFO; WIFF; seismisk dampning; seismisk dispersion;

    Sammanfattning : Conventional AVO analysis has been used for the past 4 decades to aid in locating oil and gas reservoirs for extraction. It is, however, not possible to use it to acquire information on the porosity of the rock, the fluid saturation or other important petrophysical parameters. LÄS MER

  7. 5. CORROSION-FATIGUE TESTING ON STEEL GRADES WITH DIFFERENT HEAT AND SURFACE TREATMENTS USED IN ROCK-DRILLING APPLICATIONS

    Master-uppsats, KTH/Materialvetenskap

    Författare :Luis Miguel Béjar; [2016]
    Nyckelord :corrosion fatigue; crack; rotating-bending; S-N curve; staircase method; fatigue strength; shot peening; case hardening; through hardening; fatigue; corrosion; rock drill; atlas copco; steel;

    Sammanfattning : Corrosion fatigue is a common failure mechanism in rock drilling components and many othermechanical parts subjected to cyclic loads in corrosive environments. A crucial part in the design ofsuch components resides in the selection of the right materials for the application, which ideallyinvolves testing and comparison of their performance under working conditions. LÄS MER