Effect of Mo Alloying on Wear Behavior of Hadfield Steel

doi:10.3901/JME.2020.14.081

Abstract

Abstract: Hadfield steel is one of the most widely used wear-resistant materials. However, with the deterioration of service conditions, the traditional high manganese steel is unable to meet the use requirments. Mo element is added in traditional Hadfield steel. Tensile properties and wear behaviors under same test conditions of Mo alloyed Hadfield steel (Mn13Mo steel), and traditional Hadfield steel (Mn13 steel), are studied by means of optical microscope, scanning electron microscope and electron backscattered diffraction (EBSD) technology, etc. Results show that Mo significantly refine the grain size of Hadfield steel. The strength and plasticity are improved obviously, with high deformation compatibility. This is mainly due to the reduction of stacking fault energy of Hadfield steel by Mo element, which made it easier to activate deformation twins to coordinate the plastic deformation. In the wear test, Mn13Mo steel, due to its excellent work hardening ability and plasticity, forms a hardened surface with high hardness and a deeper strain layer, showing a better wear resistance, and the surface has formed a dynamic balance between hardening and wear. With prolonging the wear time, the wear resistance of the Mn13Mo steel prevails. The results are of guiding significance and reference value for alloying treatment of Hadfield steel.

Key words: hadfield steel, Mo, alloying, wear resistance

CLC Number:

TG142

MA Hua, CHEN Chen, WANG Lin, XU Ming, CHANG Guoji, ZHANG Fucheng. Effect of Mo Alloying on Wear Behavior of Hadfield Steel[J]. Journal of Mechanical Engineering, 2020, 56(14): 81-90.

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