Loading...

Microstructure and Wear Properties of WC/CuZnNi Compsite Surface Coating

Rafie Azad, Mehran | 2015

721 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46615 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Kokabi, Amir Hossein; Aashuri, Hossin
  7. Abstract:
  8. The microstructure and wear performance of WC/Cu-Zn-Ni composite surface coating has been investigated using a combination of microscopy, hardness, and wear testing. The oxidation behavior of tungsten carbide hard metal in the temperature range between 600 and 900 ◦C was also researched. The oxidation mass gain of WC correlated almost directly with temperature as well as time. The particle of hard metal is surrounded by the α Cu+β Zn phase in the surface coating. The size of hard metal is almost unchanged from its original one. There exists an inter-diffusion zone at the interface of the hard metals and Cu-based matrix. The wear volume of the WC/Cu-Zn-Ni composite surface coatings increased with the increasing of applied load. However, the composite surface coating of WC/Cu-Zn-Ni with the smallest tungsten carbide size as well as the highest volume percent exhibited lower wear volume than that of other composite surface coating. According to the results of engineering application, the working efficiency and employing life of milling tools, which were surfaced WC/Cu-Zn-Ni surface coating, is by approximately 2–3 times the milling tools without surface coating
  9. Keywords:
  10. Wear Resistance ; Microstructure ; Oxidation ; Copper Base Filler Metal ; Hard Metal ; Oxidation Behavior

 Digital Object List

 Bookmark

No TOC