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

Abstract

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 Mo2C and strip-like (Fe, Cr)3C phases in Mn18Cr2Mo manganese steel. The orientation of the Mo2C phase and the austenite matrix are [001]austenite// 10 1 ¯ Mo2C, (020)austenite//(020)Mo2C, 2 ¯ 00 austenite//(202)Mo2C and 2 ¯ 20 austenite//(242)Mo2C. The that of the (Fe, Cr)3C phase and the austenite matrix are [011]austenite// 12 1 ¯ (Fe, Cr)3C and 11 1 ¯ austenite//(210)(Fe, Cr)3C. Besides, 1 ¯ 1 1 ¯ austenite is approximately parallel to 1 1 ¯ 3 (Fe, Cr)3C. The interface relation of (002)austenite is approximately parallel to 1 ¯ 2 ¯ 3 (Fe, Cr)3C. 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.