Effect of Heat Input on Stellite 6 Coatings on a Medium Carbon Steel Substrate by Laser Cladding

Abstract

. (2015). Effect of heat input on Stellite 6 coatings on a medium carbon steel substrate by laser cladding. Materials Today: Proceedings, 2 (4-5), 1747-1754. Effect of heat input on Stellite 6 coatings on a medium carbon steel substrate by laser cladding AbstractStellite 6 was deposited by laser cladding on a medium carbon steel substrate (MS) with energy inputs of 1. kW (MS 1) and 1.8. kW (MS 1.8). The chemical compositions and microstructures of these coatings were characterized by atomic absorption spectroscopy, optical microscopy and scanning electron microscopy. The microhardness of the coatings was measured and the wear mechanism of the coatings was assessed using a pin-on-plate (reciprocating) wear testing machine. The results indicated less cracking and pore development for Stellite 6 coatings applied to the medium carbon steel substrate with the lower heat input (MS 1). Moreover, the Stellite coating for MS 1 was significantly harder than that obtained for MS 1.8. The wear test results indicated that the weight loss for MS 1 was much lower than for MS 1.8. It is concluded that the lower hardness of the coating for MS 1.8, markedly reduced the wear resistance of the Stellite 6 coating. Disciplines Engineering | Science and Technology Studies AbstractStellite 6 was deposited by laser cladding on a medium carbon steel substrate (MS) with energy inputs of 1 kW (MS 1) and 1.8 kW (MS 1.8). The chemical compositions and microstructures of these coatings were characterized by atomic absorption spectroscopy, optical microscopy and scanning electron microscopy. The microhardness of the coatings was measured and the wear mechanism of the coatings was assessed using a pin-on-plate (reciprocating) wear testing machine. The results indicated less cracking and pore development for Stellite 6 coatings applied to the medium carbon steel substrate with the lower heat input (MS 1). Moreover, the Stellite coating for MS 1 was significantly harder than that obtained for MS 1.8. The wear test results indicated that the weight loss for MS 1 was much lower than for MS 1.8. It is concluded that the lower hardness of the coating for MS 1.8, markedly reduced the wear resistance of the Stellite 6 coating.

Coaxial Laser Cladding of Cobalt-Base Alloy Stellite™ 6 on Grey Cast Iron Analysis of the Microstructural and Mechanical Properties Depending on the Laser Power

“…An increasing laser power induces an intensified melting of the substrate and causes more pronounced melt dynamics/ dilution and temperature rise (Ref 29,57). As a result, the surface tension of the weld pool decreases (Ref 31), and the wettability angle converges asymptotically: cos(a) fi 1, whereas the height decreases in parallel with a constant powder feeding rate (Ref 8).…”

Analysis of the Geometry of Wear Tracks in Laser Deposited Stellite 6 Coatings

“…The sliding wear behaviour of Stellite 6 coated samples produced by laser cladding has been investigated and reported for six high strength alloy substrates in recent publications by the authors [1][2][3][4][5][6][7] .…”

Effect of cladding of stellite-6 filler wire on the surface of ss316l alloy through cold metal arc transfer process

“…The results showed that the satellite-6 cladding was better than the SS. Alain Kusmoko et al [16] did stellite-6 cladding on medium carbon steel using laser cladding and found fewer cracks on the specimens which were coated by lower heat input. C.R.C Lima et al [17] compared the corrosion and wear property of stellite-6 cladding by TIG and high-velocity oxygen fuel (HVOF) process and found HVOF was having better wear resistance and TIG had better corrosion and erosion results.…”