FEASIBILITY STUDY OF DIFFUSION WELDING ON STRUCTURAL STEEL AND CAST STEEL FOR MARINE APPLICATION

Abstract

Steel is an alloy of iron and carbon that is widely used in construction and other applications because of its hardness and tensile strength. Steel is one of the most use metals in many fields due to its almost limitless capabilities. Cast steel and structural steels are similar or dissimilar in nature with reference to its heat treatment and chemical composition. Thus, bonding of such material is very important. Diffusion bonding is a joining process between materials in which the principal mechanism for joint formation is solid state diffusion. Through the application of pressure at high temperature, coalescence of the faying surface can be accomplished. During bonding, no melting and only limited macroscopic deformation or relative motion of the parts occurs. Microscopic deformation followed by re-crystallization occurrences. Self-diffusion in the same materials and inter diffusion between the materials take place simultaneously near the bond area. Form of new crystalline of the original elements and inter-metallic compounds may grow during the process. This is where the research attempting to study the attainable nature of joint between cast steels and structural steels.