Second phase structure analysis and wear behavior of the ultra-high manganese steel

Abstract

The high manganese steel is widely used in wear-resisting parts of the cone crusher, such as the grinding mill wall and crushing wall. In this work, the microstructure and wear resistance of an ultra-high manganese steel (Mn18Cr2Mo) were analyzed by electron diffraction and high-resolution transmission electron microscope (HRTEM) observation and impact abrasive wear test. The results show that there are spherical or block Mo _2 C and strip-like (Fe, Cr) _3 C phases in Mn18Cr2Mo manganese steel. The orientation of the Mo _2 C phase and the austenite matrix are [001] _austenite // $\left[10\overline{1}\right]$ _Mo _2 _C , (020) _austenite //(020) _Mo _2 _C , $\left(\overline{2}00\right)$ _austenite //(202) _Mo _2 _C and $\left(\overline{2}20\right)$ _austenite //(242) _Mo _2 _C . The that of the (Fe, Cr) _3 C phase and the austenite matrix are [011] _austenite // $\left[12\overline{1}\right]$ _(Fe, Cr) _3 _C and $\left(11\overline{1}\right)$ _austenite //(210) _(Fe, Cr) _3 _C . Besides, $\left(\overline{1}1\overline{1}\right)$ _austenite is approximately parallel to $\left(1\overline{1}3\right)$ _(Fe, Cr) _3 _C . The interface relation of (002) _austenite is approximately parallel to $\left(\overline{1}\overline{2}3\right)$ _(Fe, Cr) _3 _C . Owing to high density dislocations, deformation bands, microcrystal and non-crystalline, the wear resistance of the Mn18Cr2Mo manganese steel is 1.83 times that of the Mn13 manganese steel under the impact abrasive wear test.

Keywords

• Ultra-high manganese steel
• second-phase
• microstructure
• wear resistance