Laser Cladding Research Paper
Laser cladding of Nickel powder on AISI 202 stainless steel and optimization of the process parameters
Abstract. Laser cladding is a build-up manufacturing or layer by layer process in which the laser interacts with the powder and deposited on the substrate. In this study the nickel powder were melted and deposited on the stainless steel SS202 substrate. The process parameters used are laser power, travel speed and powder feed rate. The micro hardness of the clad layer was measured and the macrostructure of the clad area was analysed. The influences of the laser process parameters are observed and optimum parameters were obtained to improve the clad quality.
Keywords: Laser cladding, Laser power, micro hardness, Macrostructure, Optimization
1 Introduction
Laser cladding is the method of adding one material over another to generate a layer. It is a process of depositing a powder or wire material over the
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The process parameters of laser power, powder feed rate and travel speed have been varied to examine the process responses of clad quality. The process parameters were analysed based on L9 orthogonal array is presented in (Table.2).
Table. 2 Experimental data with L9 orthogonal array
SI No Laser power- LP (KW) Travel speed - TS (mm/min) Powder feed rate - PFR (g/min) Clad width (W) (mm) Clad height (H) (mm) Aspect ratio (W/H) % SNRA1 Micro hardness at Interface zone (HV)
1 1.7 500 8 3.3491 0.5660 5.917 -15.4420 360
2 1.7 650 10 3.4561 0.5316 6.501 -16.2596 390
3 1.7 800 12 3.7500 0.5189 7.226 -17.1780 410
4 2.1 500 10 3.2601 0.5201 6.268 -15.9426 370
5 2.1 650 12 3.4211 0.6368 5.372 -14.6027 402
6 2.1 800 8 4.0330 0.5189 7.772 -17.8107 448
7 2.5 500 12 3.3210 0.5125 6.480 -16.2315 398
8 2.5 650 8 3.8591 0.5238 7.367 -17.3458 404
9 2.5 800 10 3.8916 0.6373 6.106 -15.7151 430
Fig. 2 Laser cladded samples with multi
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