Post weld heat treatment and operating temperature effect on tribological behavior of laser cladded stellite 21 coating
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Gehring Group, FL (United States)
- Ford Motor Company, MI (United States)
This study intends to investigate the feasibility of using laser cladding as a potential process to repair hot working tools by a hardfacing process. A Stellite 21 alloy coating was printed on a 350 maraging steel via laser cladding and the coating microstructure and tribological performance were characterized in as printed conditions and after heat treatment. Such a laser-processed coating showed a high integrity with little porosity and good bonding with the substrate. The Stellite coating produced substantially lower friction and a smoother contact area but had inferior wear resistance compared with the maraging steel substrate. Post process heat treatment at 650 °C for 20 h led to significant amount of strain-induced FCC to HCP phase transformation but had little improvement in wear resistance. Detailed materials characterization using X-ray diffraction and electron microscopy provided fundamental insights to the underlying mechanisms. This study opens the door for future R&D for tool surface repair by laser cladding.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1817568
- Alternate ID(s):
- OSTI ID: 1798941
- Journal Information:
- Wear, Journal Name: Wear Journal Issue: n/a Vol. 482-483; ISSN 0043-1648
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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