Sökning: "Powder Metallurgy"

Visar resultat 16 - 20 av 39 uppsatser innehållade orden Powder Metallurgy.

1. 16. Metallförorenade bottensediment : En undersökning av fem sjöar påverkade av metallutvinning i Bergslagen och i Västerbottens inland

   Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Linn Raninen; [2017]
   Nyckelord :Lakes; Sediment; Tailings; XRF;

   Sammanfattning : This study aims to assess the potential environmental risks posed by sediments in five lakes affected by present or historical metallurgy. Special attention is paid to the lakes Dammsjön and Värlingen in mid Sweden, where the sediments were contaminated after a breach in a nearby tailings dam used for storing residue from a metal processing plant. LÄS MER

3. 17. Self Lubricating Components

   Kandidat-uppsats, Uppsala universitet/Institutionen för teknikvetenskaper

   Författare :Simon Tidén; Niklas Levin Bjärnlid; Tim Melin; Daniéla Quist; Filip Selenius Larsson; [2017]
   Nyckelord :self lubricating; solid lubricant; high speed steel; powder metallurgy; friction; wear; molybdenum disulfide; tungsten disulfide; hexagonal boron nitride; soft metals; copper;

   Sammanfattning : The tribological and mechanical properties are of great importance for a material’s lifetime, since it is highly dependent on these two factors. The purpose of this report was to examine suitable solid lubricants for Erasteel, a company that manufactures hot isostatic pressed high speed steels, that will enhance the tribological properties of their steels without worsening the mechanical properties. LÄS MER

4. 18. Self Lubricating Components

   Kandidat-uppsats, Uppsala universitet/Institutionen för teknikvetenskaper

   Författare :Filip Selenius Larsson; Simon Tidén; Niklas Levin Bjärnlid; Daniéla Quist; Tim Melin; [2017]
   Nyckelord :self lubricating; solid lubricant; high speed steel; powder metallurgy; friction; wear; molybdenum disulfide; tungsten disulfide; hexagonal boron nitride; soft metals; copper;

   Sammanfattning : The tribological and mechanical properties are of great importance for a material’s lifetime, since it is highly dependent on these two factors. The purpose of this report was to examine suitable solid lubricants for Erasteel, a company that manufactures hot isostatic pressed high speed steels, that will enhance the tribological properties of their steels without worsening the mechanical properties. LÄS MER

5. 19. Alternative welding methods for nitrogen alloyed steel

   Uppsats för yrkesexamina på grundnivå, Örebro universitet/Institutionen för naturvetenskap och teknik

   Författare :Anders Bertilsson; [2017]
   Nyckelord :Nitrogen alloyed tool steel; Uddeholm Vanax SuperClean; solid-state welding; direct-drive friction welding; friction stir welding; microstructure; Vickers microhardness testing; retained austenite measurement by X-ray diffraction; Kvävelegerat verktygsstål; Uddeholm Vanax SuperClean; trycksvetsning; friktionssvetsning; friktionsomrörningssvetsning; mikrostruktur; Vickers mikrohårdhetsmätning; restaustenitmätning med röntgendiffraktion;

   Sammanfattning : This project explores the feasibility of the solid-state welding method direct-drive friction welding to be used as a joining method for the nitrogen alloyed steel Uddeholm Vanax SuperClean, produced via processes based on powder metallurgy. Vanax SuperClean cannot be welded using fusion welding methods where the base material melts, due to nitrogen escaping the material, resulting in inferior quality welds. LÄS MER

7. 20. Property Optimization of PM-gearing

   Kandidat-uppsats, KTH/Maskinkonstruktion (Inst.)

   Författare :Marcus Söderberg Jansson; Oskar Lundkvist; [2017]
   Nyckelord :Gear; Powder Metallurgy; Property optimization; Egenskapsoptimering; Kugghjul; Pulvermetallurgi;

   Sammanfattning : The purpose of this bachelor thesis is to design and optimize a powder metal gear through FEM-analyzes. The moment of inertia and weight of the gear shall be reduced at the same time as the demands on tension and bending stiffness are met. LÄS MER