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Surface degradation of nitrided hot work tool steels under repeated impact-sliding contacts: Effect of compound layer

Kaba, M.; Altay, M.; Akyildiz, E.; Muhaffel, F.; Ozkurt, S.; Atar, E.; Baydogan, M.; Cimenoglu, H.


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{
  "DOI": "10.1016/j.wear.2022.204300", 
  "abstract": "Wear behaviour of quenched and tempered (QT) hot work tool steels (Uddeholm QRO90) was investigated against SAE 52100 grade bearing steel balls after gas nitriding using a dedicated laboratory scale impact-sliding wear test rig. Gas nitriding was employed in a fluidised bed reactor under two alternative regimes: i. High Temperature Nitriding (HTN) carried out at 510 degrees C and ii. Low Temperature Nitriding (LTN) carried out at <= 400 degrees C. The HTN process resulted in the formation of -2 mu m thick external compound layer, whereas the LTN processed steels were free of any surface compound layer formation. After the impact-sliding wear tests employed at room temperature (RT), the prevailing wear mechanisms of the examined steels were assessed as tribo-oxidation and fatigue wear. The testing at 600 ?C induced different wear mechanisms for the HTN and the LTN steels. While tribo-oxidation and fatigue wear were preserved for the HTN steel, plastic deformation dominated the wear that progressed on the compound layer free surface of the LTN steel. Impact-sliding wear testing at 600 degrees C showed that the wear rate of LTN > HTN steels, as opposed to the wear rate at RT where wear rate of HTN > LTN.", 
  "author": [
    {
      "family": "Kaba", 
      "given": " M."
    }, 
    {
      "family": "Altay", 
      "given": " M."
    }, 
    {
      "family": "Akyildiz", 
      "given": " E."
    }, 
    {
      "family": "Muhaffel", 
      "given": " F."
    }, 
    {
      "family": "Ozkurt", 
      "given": " S."
    }, 
    {
      "family": "Atar", 
      "given": " E."
    }, 
    {
      "family": "Baydogan", 
      "given": " M."
    }, 
    {
      "family": "Cimenoglu", 
      "given": " H."
    }
  ], 
  "container_title": "WEAR", 
  "id": "261081", 
  "issued": {
    "date-parts": [
      [
        2022, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Surface degradation of nitrided hot work tool steels under repeated impact-sliding contacts: Effect of compound layer", 
  "type": "article-journal", 
  "volume": "498"
}
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