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I. INTRODUCTION Martensitic stainless steels have good mechanical strength and moderate corrosion

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I. INTRODUCTION
Martensitic stainless steels have good mechanical strength and moderate corrosion resistant. Because of their excellent corrosion resistance and mechanical strength, martensitic stainless steels are used for manufacturing the steam turbine blades, heat exchangers, automotive components and structures, petrochemical & process piping. Properties of martensitic stainless steel can be changed by the heat treatment. Increasing productivity of any welding process while maintaining or even improving the weld quality has been the task of researchers in the field of development of welding processes. Over the years welding methods and techniques have developed to great extent [3]. Now it is feasible to weld starting from thin metal …show more content…

A. Base metal and fillers used
In the present research work rolled plates of Martensitic stainless steel (AISI 410 SS) were cut to length from the flats and each plate was cut to dimensions length 200mm, width 75mm and thickness 5mm. During welding of the base plates metallurgically compatible filler wire AISI 410 SS was used to fill the groove volume. AISI 304L SS solid filler wire was used for giving root pass for each plate and the welding parameters for giving root pass were kept same for each joints. The composition of base metal and filler wires is shown in Table 1.
Table 1: Chemical composition of base metal and filler wires
Elements C S Mn Cr Ni Si P Fe
Base Metal (AISI 410 SS) 0.031 0.004 0.341 12.263 - 0.344 0.021 Balance
Filler Metal (AISI 304LSS) 0.026 0.029 1.352 17.629 9.12 1.002 0.039 Balance
Filler Metal (AISI 410 SS) 0.119 0.035 0.582 12.603 - 0.432 0.029 Balance
B. Pre-cleaning and Joint design
Prior to welding, pre-cleaning of the surface of the base plates and groove edges was done so that dust, oil, rust and other unwanted particles could be removed from the weld area, otherwise these particles may lead weld metal contamination thus resulting into some kind of weld defect. Figure 1 shows the single V-groove design used in the present work, which was selected according to the thickness of the base material.
Figure-1 Schematic showing the geometry of the single-V groove design used
C. Welding of

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