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Abstract
In the present experimental study, NiCrBSi alloy was deposited on martensitic stainless steel (AISI 410 grade) using laser cladding technique. High power diode laser (HPDL) was used to obtain good fusion, optimum dilution & crack free single track laser clad by varying laser input power (3200 W, 3600 W & 4000 W) while keeping other processing parameters constant. Powders of NiCrBSi alloy with different wt. % of Ni, Cr, B and Si (50HRC & 60HRC) were used in the current study for the deposition. Pre-heating of the substrate was carried out at around 300°C using oxyacetylene flame before deposition in order to reduce the cracks and porosity. Effect of power on microhardness of laser clad was not prominent in the range of power 3200 to 4000 W). In the case of alloy 1 maximum microhardness 692.2 HV0.3 was observed for power 3600 W, while for alloy 2 with power 3600 W maximum microhardness of as-deposited was 755.1 HV0.3.
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Details
1 Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, India
2 Shreenath Engineering Industries, K-39/1, MIDC Indl.Area, Hingna Rd, Nagpur-440016, Maharashtra, India