Abstract
This paper investigates the experimental study of laser surface hardening (LSH) of AISI 410 martensitic stainless steel by using two industrial lasers; 1600 W high power diode laser and 700 W Nd:YAG laser. The influence of the distribution and shape of the laser beam; Top-hat in diode laser and Gaussian distribution in Nd:YAG laser, have been investigated on the micro-hardness, geometrical dimensions of the hardened area (depth and width), microhardness deviation (MHD) from the base metal in width and depth of hardened layer, and the ferrite phase percentage. Microstructure evaluation of the laser hardened zones were performed using optical and FE-SEM. Results show that the diode laser creates a higher surface hardness, more depth and width of hardness, more MHD in depth and width and less ferrite phase than the Nd:YAG laser, which is because of lower wavelength of diode laser (808 nm) than Nd:YAG laser (1064 nm) that lead to higher laser energy absorption. Observations indicate that hardened layer of diode laser is about 620 HV0.3 with 1.8 mm depth, while for Nd:YAG laser is about 598 HV0.3 with 0.211 mm depth.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
