Experimental investigation on gas metal arc welding using 3Cr 1Mo steel served at high temperatres

Welding is a technique of joining two similar or dissimilar materials (regularly metals) through restricted combination coming about in view of a appropriate use of temperature, weight and metallurgical conditions. Dependent upon the blend of temperature and weight from a high temperature with no weight to a high weight with low temperature, a wide extent of welding structures has been made. There are various sorts of welding including Metal Arc welding, Submerged Arc welding, Gas Tungsten welding, Shielded Metal arc welding, Gas Metal Arc welding, Electron Slag welding etc. While there are various methods for joining metals, welding is a best among the most supportive and quick methodologies available. The gas metal arc welding measure uses a solid wire terminal that is interminably reinforced into the weld pool.The wire anode is eaten up and transforms into the filler metal. Gas metal arc welding equipment is relatively low in cost compared with other methods. The low beginning expense, the ability to weld continually, and the ability to store weld metal faster, make gas metal arc welding a suitable choice for welding. This topic covers almost each part of GMAW. It includes all parts of GMAW like welding machine, safeguarding gases, filler/terminal wire and welding joint get together of welding plates. From results it is interpreted that hardness of joint increases as we the temperatre increases and shielding gases does not have much effect on the joint. Tensile strength of the joint is very much effected by the temperature increasing. So low heat and Ar. CO₂.O₂ shielding gas promotes tensile strength with very good joint strength. As from the study of results it is seen changes in mechanical properties, microstructure of welded joint, gas absorption with the change in shielding gas and heat input in gas metal arc welding.