Modificación de los aceros rápidos de herramientas AISI M2 por fusión superficial con láser bajo diferentes condiciones de operación

  1. Arias Otero, Jorge Luis
  2. Cabeza Simó, Marta
  3. Castro, Graciela
  4. Feijoo Vázquez, Iria
  5. Merino Gómez, Pedro
  6. Pena Uris, Gloria
Revista:
Revista de metalurgia

ISSN: 0034-8570

Ano de publicación: 2010

Volume: 46

Número: 3

Páxinas: 206-218

Tipo: Artigo

DOI: 10.3989/REVMETALM.0918 DIALNET GOOGLE SCHOLAR lock_openAcceso aberto editor

Outras publicacións en: Revista de metalurgia

Resumo

We applied a laser surface melting treatment to AISIM2 high-speed steel �hardened and tempered- and studied the resulting surface characteristics (microstructure) and mechanical behavior (hardness and wear performance). The steel was treated using a Nd:YAG continuous-wave laser with different operation conditions. The influence of the laser processing parameters on the single tracks and on melted surface layer obtained by multipass system with 50% overlap were studied. The microstructure for all conditions is formed byMC- andM2C-type carbides, martensite and retained austenite; the quantities of this phase depends on the operations conditions. It has been determined that low levels of power density and high speed scanning of the beam leads to greater homogeneity in the microstructure with high hardness values and wear resistance.

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