Modification of M2 hardfacing: Effect of molybdenum alloying and laser surface melting on microstructure and wear performance

0507467 - ÚFP 2020 RIV CH eng J - Journal Article
Dilawary, S. A. - Motallebzadeh, A. - Houdková, Š. - Medlín, R. - Haviar, S. - Lukáč, František - Afzal, M. - Cimenoglu, H.
Modification of M2 hardfacing: Effect of molybdenum alloying and laser surface melting on microstructure and wear performance.
Wear. Roč. 404, June (2018), s. 111-121. ISSN 0043-1648. E-ISSN 1873-2577
Institutional support: RVO:61389021
Keywords : high-speed steel * stellite 12 * tool steel * sliding speed * iron-oxides * behavior * solidification * carbides * resistance * decomposition * M2 high-speed steel * Hardfacing * Molybdenum * Laser surface melting * Tribo-oxide * Wear
OECD category: Coating and films
Impact factor: 2.950, year: 2018
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/abs/pii/S004316481830108X?via%3Dihub

The influence of alloying (10wt% Molybdenum) and post deposition treatment (Laser Surface Melting) on the structural characteristics and wear performance of Plasma Transfer Arc deposited M2 hardfacings have been investigated. The nature of matrix and carbides of M2 hardfacing had changed upon Molybdenum addition while the Laser Surface Melting caused structural refinement and a decrease in carbide volume fraction. Despite an increase in hardness, Laser Surface Melting has resulted in reduction in sliding wear resistance against alumina counterface, while the Molybdenum enhanced the wear resistance even with decrease in hardness. This counter intuitive behaviour is attributed to Magnelli oxide containing tribo-oxide layer formation on the worn surface of Molybdenum alloyed hardfacings.
Permanent Link: http://hdl.handle.net/11104/0298451