Analysis of Tensile Strength Properties for FG260 Welded Cast Iron: A Review

Abstract

Gray cast iron is the most common cast iron and it can be effectively welded if cooling rates controlled during welding and after welding. Poor weldability of gray cast iron is due to the presence of much more carbon that is the found in flake or spherical form and silicon than other ferrous metal which results in cast iron is less ductile hence weld is subjected to more metallurgical complications in both the weld metal and the heat-affected zone. During cooling the carbon is precipitated in the form of graphite flakes which are difficult to weld, the weld metal does not fuse to the graphite flakes. The welding was carried out with oxyacetylene welding, using nickel based filler metal and cast iron rod (RCI) respectively to join grey cast iron and to analyze mechanical properties such as tensile strength and hardness of CI casting before and after salvaging. The castings can produced by varying different casting process parameters such as pouring temperature, pouring time and mold hardness and by using Taguchi method the analysis of tensile strength and hardness will be analyze. During measurement of tensile strength the castings going to break and after that the salvaging of the castings is done by oxyacetylene welding method. The study of comparison of analysis of properties before and after salving is done. After welding joining of cast iron FG260 piece, tensile strength and hardness properties increase.