• Mr. Parveen Kumar

In large steel fabrication industries such as shipbuilding, power plants and petro-chemicals, Gas Metal Arc Welding (GMAW) is the one of the most common technique for joining metals. Its various characteristics like high productivity, improved mechanical properties, easy of automation and overall lower cost of production makes it first choice for many fabrication processes. This paper focuses on the GMAW of 2.25 Cr-1Mo high temperature creep resistance steel, which is used in power plants, petrochemicals and in nuclear industries. In this work, we able to find the effect of welding parameters such as heat input and shielding gas on the properties of weld metal. The main objectives are to evaluate the hardness and tensile strength of weld metal. In this experimental study, two welding parameters are used and they are: a) Heat input (high heat input & low heat input) b) Shielding gas (Argon - Carbon-dioxide - Oxygen and Argon - Carbon-dioxide). The experimental results and their analysis clearly indicate that there is a possibility of sound welding with good combination of heat input and shielding gas. By controlling weaving, lower heat input can be achieve which causes increase in impact value of weld joint by three times and further reduces the chances of temper-embrittlement. Therefore, the work carried out clearly indicates that there is a considerable improvement in the quality of weld of 2.25 Cr-1Mo steel components when they are welded with low heat input using Ar-CO2as shielding gas as comparison with high heat input and Ar-CO2-O2 blend of shielding gas.

Gas metal arc welding, heat input, shielding gas, temper-embrittlement, microstructure, inclusion and gas absorption

"TO STUDY THE EFFECT OF PROCESS VARIABLE ON THE PROPERTY OF 2.25 Cr-1 Mo STEEL IN GAS METAL ARC WELDING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 5, page no.803-815, May-2017, Available :http://www.jetir.org/papers/JETIR1705137.pdf

"TO STUDY THE EFFECT OF PROCESS VARIABLE ON THE PROPERTY OF 2.25 Cr-1 Mo STEEL IN GAS METAL ARC WELDING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 5, page no. pp803-815, May-2017, Available at : http://www.jetir.org/papers/JETIR1705137.pdf