Wear resistance of MAG cladded 27MnCrB5-2 base material with the SG3 solid wire

Abstract

Cladding is one of the most commonly used technologies for extending the lifespan of wear- exposed products and surface hardening. This work presents cladding using the MAG process, where, during the experimental part of the research, the filler material BÖHLER SG 3 in the form of wire was clad onto the base material (27MnCrB5-2). We applied one, two, and three layers of cladding. It is known that cladding creates a dilution zone between the base and filler material, which is most visible in single-layer cladding. Our primary interest of research was how the number of cladding layers affects the hardness and wear resistance of the top layer of the cladding. The cladding was performed using a robot in a robotic cell, where we produced nine samples. We then conducted a wear test to ASTM G65 standard on a custom-made SLO-ASTM G65 testing machine. The samples were later halved, and the specimens were prepared for laboratory work, where we examined them and measured hardness and the dilution zone. None of the measurements showed significant differences in wear resistance and hardness. A slight deviation was observed only in the sample with three layers, which proved slightly more resistant than the samples with one and two layers.