Designing of CK45 carbon steel and AISI 304 stainless steel dissimilar welds

Abstract

Gas tungsten arc welding of CK45 and AISI304 stainless steel was performed through preparation of different types of samples using ER308L and ERNi-1 wires. Welded samples were studied by different techniques including optical metallography, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction, hardness measurements and impact test. It was observed that in the buttered specimen, the structure of the weld metal was completely austenitic while the microstructure of unbuttered sample was duplex ferritic-austenitic. M 23 C 6 -type carbides were observed within the weld metal of both as-weld specimen types. Effects of different post-weld heat treatments (PWHTs) were investigated. The experimented results concluded that simultaneous grain growth and carbides precipitation were competitive during PWHT. Also, there were not any indication related to sigma-phase in as-welded and PWHTed specimens due to their lower Cr/Ni ratios and insufficient preservation times.

Evaluation of Microstructure and Impact Toughness of Shielded Metal Arc Dissimilar Weldments of High Strength Low Alloy Steel and Austenitic Stainless Steel

“…Fig. 3a is a micrograph of DWM under L2 condition, which presents an A-type solidification pattern of stainless steel, the microstructure is completely austenitic due to diffusion of Ni into the dissimilar weld metal as austenite forming element, similar scenario was reported by Pouraliakbar et al (2014). As can be seen from Table 2, L2 presents lowest heat input (1.66kJ/mm) which is an integral requirement of dissimilar welding for minimising dilution and carbon migration at the weld interface.…”

Effect of Nickel Powder Buffering Layer on Microstructure and Hardness Properties of High Carbon Steel / Stainless Steel Arc Stud Welding

“…In a process system that contains multiple parts, every part might work at a specific condition. Consequently, combination of different materials is necessary in design, especially in applications that require a certain combination of properties 1,2 . Welding technique can be employed to join between dissimilar metals.…”

Study of Welding Dissimilar Metals – Low-carbon Steel AISI 1018 and Austenitic Stainless Steel AISI 304

“…Studies (Bodude and Momohjimoh, 2015, Muthupandi et al, 2003, Yang et al, 2012 show that the microstructure and the mechanical properties are affected by the amount of the heat input that is applied during the welding process. The dissimilar metal joints between austenitic stainless steel and low-CS have many critical applications in different fields of industry, such as in boilers, pressure vessels, and heat exchangers of power plants and other industries such as petrochemical, oil, and gas industry (Pouraliakbar et al, 2014). Mani et al, 2015, characterized the microstructure of dissimilar welded components AISI 304 austenitic and AISI 430 ferritic stainless steel (FSS) alloys.…”