Coating of High-Alloyed, Ledeburitic Cold Work Tool Steel Applied by HVOF Spraying
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- Rajasekaran, B., Mauer, G., Vassen, R. et al. J Therm Spray Tech (2010) 19: 642. doi:10.1007/s11666-009-9456-5
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This study demonstrates the processing of a cold work tool steel (X220CrVMo13-4) coating using HVOF spraying. The coating formation was analyzed based on microstructure, phase, hardness, porosity, oxidation, and adhesion characteristics. An online diagnostic tool was utilized to find out the in-flight characteristics of powder such as temperature and velocity during the coating process to identify the influencing parameters to achieve dense cold work tool steel coatings with low oxidation. The influence of powder size, process parameters, and in-flight characteristics on the formation of cold work tool steel coatings was demonstrated. The results indicated that thick and dense cold work tool steel coatings with low oxidation can be obtained by the selection of appropriate powder size and process parameters.