The rebuilding technologies are used to develop surface of ladle. Among many welding methods currently used to obtain surface layer

without defects one of the most effective way of rebuilding is using metal arc welding. This additional material gives more possibilities to

make expected quality of rebuild surface.

Chemical composition, property and economic factors allow to use metal wire. Because of these reasons, solid wire gives opportunity to be

wildly used as material to rebuild or repair the surface in different sectors of industry.

The paper shows a few ways to rebuild the surface in the massive cast with the use of metal active gas welding for repair. The work

presents studies of defect in the massive cast. It contains the pictures of microstructures and defects. The method of removing defects and

the results of checking by visual and penetrant testing methods are shown. The paper describes the methodology of repair the ladle with

metal active gas welding, preheating process and standards nondestructive testing method.

The material selected for this investigation was low alloy steel weld metal deposit (WMD) after MAG welding with micro-jet cooling. The

present investigation was aimed as the following tasks: analyze impact toughness of WMD in terms of micro-jet cooling parameters. Weld

metal deposit (WMD) was first time carried out for MAG welding with micro-jet cooling of compressed air and gas mixture of argon and

air. Until that moment only argon, helium and nitrogen and its gas mixture were tested for micro-jet cooling