The Structure and Properties of the Modified Nitrogenated High-Chromium Steel for Welding the Parts of Oil and Gas Equipment.

The influence of nitrogen and titanium carbonitride particles on the structure and properties of highchromium steel, deposited by flux cored wire, has been studied. It has been shown that the quality formation of the weld metal and pore absence in it are achieved with nitrogen concentration in wire filler no more than 0.32 mass%. It has been found that in adding titanium carbonitride particles from 0.2 to 0.6 mass% to wire filler the effect of weld Fe-C-Cr-Mo-Ni-N system metal modification is implemented and its operational properties increase. The developed flux cored wire has been recommended for oil and gas equipment welding. [ABSTRACT FROM AUTHOR]