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Wear Behavior of Cast Rods Manufactured for Hard Surfacing Iron Based Alloy

Momeni, Hadi | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41670 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Kokabi, Amir Hossein; Varahram, Naser
  7. Abstract:
  8. Wear of parts during service is one of the main factors of damage to the industrial parts. From among various kinds of wear, abrasive wear has the most role in damage of industrial parts. Hard surfacing is a useful and cost effective method for improving the surface properties of parts. This method is made through coherent layer sediment from the alloys resistant to abrasion, oxidation and wear by welding or spray. Determining the appropriate alloy for hard surfacing operations need knowing of working conditions of the part and the type of occurred abrasion. Ordinarily, the alloys which are prepared for hard work by welding, are in the form of cored wire or electrodes. In this research die casting method was used for production of these wires and 4 different combinations of these alloys were cast rods by vacuum suction. Welding by Tungsten electrode and protective gas on ordinary steel was made. Then hardness and wear tests were performed on the samples and at the end, microscopic studies were performed to determine the mechanism of removing the substance from the surface. The results show that microstructure of the samples is an important parameter in determining resistance to wear in comparison to the hardness. Also strong carbidizing elements such as Molybdenum and Niobium, create better wear as compared to Chrome. The mechanism of wear in ordinary steel which includes deep grooves due to cutting and destruction holes, changed to even and shallow wear in the resulting alloys and the volume of destruction holes decreased.


  9. Keywords:
  10. Surface Hardening ; Abrasive Wear ; Wear Resistance ; Cast Rods ; Carbidizing Elements ; Wear Mechanism

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  • page 1.pdf
    • نگارش
    • سيدهادی مومنی
  • Page.1 Resaleh. A.pdf
  • تقديم به پدر و مادر عزيزم.pdf
  • تشکر.pdf
  • Abstract farsi.pdf
    • چكيده
  • Payan Nameh.pdf
    • فصل اول: مقدمه و مروري بر منابع
      • 1-1- مقدمه
      • 1-2- سايش
  • فهرست جداول.pdf
  • فهرست شکل.pdf
  • Payan Nameh1.pdf
    • فصل اول: مقدمه و مروري بر منابع
      • 1-1- مقدمه
      • 1-2- سايش
      • 1-3- طبقه بندي انواع سايش
        • 1-3-1- سايش سايا
        • 1-3-1-1- سايش سايا تحت تنش پايين
        • 1-3-1-2- سايش سايا تحت تنش بالا
        • 1-3-1-3- سايش شياري
        • 1-3-1-۴- سايش پوليش كاري
        • 1-3-2- مكانيزم هاي برداشته شدن ماده از سطح در سايش سايا
        • 1-3-3- تاثير خواص ماده بر روي سايش سايا
        • 1-3-4- فرسايش
        • 1-3-4-1- فرسايش ناشي از برخورد ذرات
        • 1-3-4-2- فرسايش حفره اي
        • 1-3-4-3- فرسايش دوغابي
        • 1-3-5- سايش چسبنده يا لغزشي
        • 1-3-5-1- سايش مالشي
        • 1-3-5-2- جوش خوردگي موقت
        • 1-3-5-3- سايش خراشي
        • 1-3-5-۴- سايش چسبنده
        • 1-3-5-۵- سايش اكسيدي
        • 1-3-5-۶- سايش همراه با ذوب
        • 1-3-6- خستگي سطح
      • 1-۴- عوامل موثر بر سايش
        • 1-۴-1- اثر دما بر سايش
      • 1-۵- حفاظت در مقابل سايش
        • 1-۵-1- پوشش كاري الكتريكي
        • 1-۵-2- آنودي كردن
        • 1-۵-3- نفوذ دادن
        • 1-۵-۴- فلز پاشي
        • 1-۵-۵- عمليات حرارتي
        • 1-۵-۶- سخت‌سازي سطحي
      • 1-۶- سخت كاري سطحي
        • 1-۶-1- تاريخچة سخت كاري سطحي
        • 1-۶-2- طبقه بندي آلياژهاي سخت كاري سطحي
        • 1-۶-3- روش هاي جوشكاري مورد كاربرد در عمليات سخت كاري سطحي
        • 1-۶-۴- كاربردهاي سخت كاري سطحي
        • 1-۶-5- عمليات سخت کاري سطحي براي مقابله با سايش سايا
      • 1-7- مطالعات و پژوهش هاي انجام گرفته در زمينه سايش سايا
      • فصل دوم: روش پژوهش
        • 2-1- توليد مفتول هاي ريختگي
          • 2-2- عمليات سخت كاري سطحي
          • 2-3- آماده سازي نمونه ها
          • 2-4- ترکيب شيميايي لايه رسوب داده شده
          • 2-5- آزمايش سايش
          • 2-6- آزمايش سختي سنجي
          • 2-7- مطالعات ريزساختاري
          • 2-8- مطالعات سطح سايش
      • فصل سوم: نتايج و بحث
        • 3-1- بررسي ريز ساختار
        • 3-2- بررسي ارتباط سختی و سايش
        • 3-3- بررسي ميکروسکوپي سايش
      • فصل چهارم: نتيجه گيري و پيشنهادات
        • 4-1- نتيجه گيري
        • 4-2- پيشنهادات
      • فصل پنجم: منابع و مراجع
  • Abstract Eng.pdf
  • Sharif University of Technology.pdf
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