Influence of Titanium on Strength of Weldable Wire Rod ER50-G Steel

The chemical compositions,mechanical properties,microstructure and precipitates of the weldable wire rod ER50-G produced by Shougang were detected and analyzed statistically in this study.The influence of titanium on the microstructure and precipitates of ER50-G and therefore the tensile strength wire were analyzed.The results showed that a large number of titanium-containing compounds formed and precipitated in ER50-G wire steel.These particles helped to refine the microstructure of ER50-G wire,and also brought significant precipitation strengthening contribution to ER50-G wire.The increment of tensile strength induced by titanium-containing precipitates could be more than 200 MPa.Well control the precipitation behavior,especially decreasing and stablising the precipitation strengthening effects,had been proved to be beneficial of improving the drawing performance of ER50-G wire.