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Laser rapid manufacturing of bi-metallic tube with Stellite-21 and austenitic stainless steel |
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| Authors: | P Ganesh R Kaul S Mishra P Bhargava C P Paul Ch Prem Singh P Tiwari S M Oak R C Prasad |
| Affiliation: | (1) Laser Materials Processing Division, Raja Ramanna Centre for Advanced Technology, Indore, 452 013, India;(2) Indus Synchrotron Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore, 452 013, India;(3) Metallurgy and Materials Science Dept., IIT Bombay, Mumbai, 400 076, India |
| Abstract: | Fabrication of multi-material engineering components is one of the technologies to address diverse and conflicting functional requirements posed by rapid technological development. Bi-metallic tube is one such multi-material component with different materials on internal and outer surfaces. This paper briefs about fabrication of a bi-metallic tubular structure with an indigenously developed 3.5 kW CO2 laser integrated with a beam delivery system, a 5-axis CNC work station along with a powder feeding sub-system. The bi-metallic tube was fabricated with cobalt based alloy Stellite 21 on inner diameter and type 316L stainless steel on the outer diameter. Besides, a stainless steel tube with an internal step of Stellite 21 was also fabricated. As-fabricated bi-metallic structure was structurally sound and carried desired transition in chemical composition and hardness across its wall thickness. |
| Keywords: | laser rapid manufacturing CO2 laser bimetallic tube Stellite 21 stainless steel |
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