The evaluation with taguchi method and alloyed by plasma transferred arc welding method of surface Hardox 400 steel

In this study; The Hardox 400 microalloyed steel surface was alloyed by plasma transfer arc (PTA) welding method using B4C-TiC-FeCrC-SiC powders. The abrasive wear behavior of the obtained coating layers are examined and optimized by the Taguchi method. The coating layer was analysed using optical microscope (OM), scanning electron microscope (SEM), X-ray diffractogram (XRD) and X-ray energy dispersive spectrometer (EDS). As a result of optical microscope and microstructure analyses, it was determined that the coating layer and the sub-layer were connected to each other metallurgical and there were MC (metal carbide) and Me-B (metal boride) and intermetallic phases in the structure. Abrasive wear behavior has been evaluated to be due to mass loss in the abrasive grain size of 120-180 abrasive grain size 6-16 N load and 10-20-30-40 meters shifting distance. Also; untreated microalloyed Hardox 400 steel material was heat treated in different cooling environments. Wear tests were similarly applied to these samples. Then datas were evaluated by the Taguchi method. The effect of wear loss on the lowest wear behavior, which is a most important criterion in determining the wear behavior, was optimized with the lowest-the best control characteristics of the Taguchi method and the results were analyzed with graphical methods. The result of the heat treatment, the tempering was carried out by cooling in water, oil and oven.