February 1, 2015 Thesis Open Access

Asmamaw Dagne

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{
  "DOI": "10.20372/nadre:1323", 
  "author": [
    {
      "family": "Asmamaw Dagne"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2015, 
        2, 
        1
      ]
    ]
  }, 
  "abstract": "<p>Wheel and rail is one of the most important material used to support and guide rail vehicle safely<br>\nand smoothly. Since wheel and rail suffers from various interacting mechanical and thermal<br>\nforces, friction modifiers, various contaminants and environmental atmosphere, wear poses large<br>\nproblem on wheel and rail.<br>\nWheel and rail wear can be result in an extensive cost for truck owner, if it is not predicated and<br>\nprevented in an efficient way. To limit these costs, one measure is to predicate and prevent wheel<br>\nand rail wear through wear modeling.<br>\nThe purpose of this research is to investigate the influence of heat treating both wheel and rail at<br>\nthe same time on rolling/sliding wear of wheel and rail.<br>\nThe rolling/sliding wear of three pair of rollers used to model wheel and rail material is studied<br>\nusing twin disc rolling/sliding wear testing machine. The three pair of rollers used in this study is<br>\nmanufactured from carbon steel having similar hardness and chemical composition as that of<br>\nstandard wheel and rail. Then the two pair of rollers is heat treated in an electric furnace to<br>\nimprove their hardness. Heat treatment was done by heating the rollers to austenite temperature,<br>\nholding at that temperature for 45minutes for uniform temperature distribution. Water or air plus<br>\noil are used as cooling median.</p>", 
  "title": "A Thesis Submitted to the School of Mechanical and Industrial Engineering in Partial Fulfillment of the Requirements for the Degree of Masters of Science in Railway Engineering", 
  "type": "thesis", 
  "id": "1323"
}