There is a need for cast irons with combined combination of properties in modern conditions. Such can be provided by ductile iron nodular and vermicular graphite, which essentially hybrid terms microstructure. The article found that graphite its mechanical rational alternative to malleable iron, namely the grade KCh45-6 (GOST 1215-79). Also, ratio nodular/vermicular (70…95/5…30%) was determined...

This work investigated the microstructure and mechanical property of high-boron multi-component alloy with Fe, B, C, Cr, Mo, Al, Si, V, Mn different contents Ti. The results indicate that as-cast metallurgical alloys consist ferrite, pearlite borocarbide. In an un-modified alloy, continuous reticular structure borocarbide is observed. After titanium addition, changes into a fine isolated morpho...

Abstract The microstructure and properties of high nitrogen stainless steel welded joints under different flash currents were studied by butt welding. results show that, the welding parameters have obvious influence on joint structure mechanical properties. is organized into symmetrical distribution, grains obtained in interface area are small, mostly pearlite ferrite. With increase current, gr...

Rail grinding is a maintenance task performed in the field to return it profile and/or remove damage, however, can affect surface integrity of rail. In this paper, damage resistance three different ground rails (R260, R350HT and R400HT) was evaluated. samples were using same parameters low-traffic line field. The rail metallurgy then examined, white etching layer (WEL) formation wear rolling co...

A strategy combining intercritical quenching, pre-tempering, and tempering processes was implemented to optimize the microstructures mechanical properties of 5CrNiMoV steel. By intercritically quenching at 1050 °C, pr-tempering 600 550 steel exhibited a comprehensive performance with yield strength 1120 MPa, an ultimate tensile 1230 elongation 8.2%. The high is attributed presence tempered mart...