Abstract
AbstractThis work focuses on performing surface modification of cold work AISI D3 tool steel and investigating its nanomechanical and wear properties. Structural property of the coated sample was obtained using XRD analysis, whereas surface characterization was performed using optical microscope, FE-SEM. Further, the mechanical properties were investigated using nanoindentation and nanoscratch test. Results show that hardening (heat treatment) of the tool steel improves the mechanical properties by reducing the primary carbides and increasing the secondary carbides which are smaller in size and hard in nature. Mechanical properties such as hardness and elastic modulus of the surface was further enhanced by plasma nitriding followed by TiCrN coating deposition. The hardness and elastic modulus of nitrided tool steel got improved by 2.24 times and 1.36 times respectively whereas specific wear rate got reduced by four orders of magnitude after deposition of TiCrN coating.KeywordsAISI D3 tool steelPlasma nitridingNanoindentationNanoscratch
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