| Abstract [eng] |
This project is concerned with selection of the best method for the protection of material surface by coating it with an anti-corrosive and wear resistant material. Five welding methods likely laser cladding, overlay welding, roll bonding, explosive welding and frictionstir welding have been taken into accounts which are used mainly for coating an over-layer material. Different materials being used in each technique from various researches is studied and some important characteristics like heat affected zone which play an important part in overlaying of base material with a high performance material because they make the weld or clad weaker and vulnerable to wear and corrosion. In this project heat affected zone is studied in detail for each method mentioned above and the various outcomes on the material after cladding or welding is explained and the materials that can be used to reduce or avoid such problems on the weld is explained. Comparison is of each method is done to draw out outcomes such as advantages, disadvantages, place of application and the ways to reduce these effects on the weld materials. Material selection has an active role in preventing this effect, hence a detail study on the materials being used for each method for particular circumstances are mentioned and conclusions are drawn from it. After analyzing all the characteristics of each method, there different application and limitations, and the various materials being used for different reasons and also the price and other important characteristics of the methods are deduced and then the best method due to its advantages when compared to other mentioned method is selected. . |
