Özet:

In this study, the AISI 5140 and the AISI 420 steel were wrapped at temperatures of 1123, 1173 and 1223 K for 2.4 and 6 hours with the box wrapping method. As a result of the experiments, the morphology of the pipeline layers formed on the steel surfaces was studied with an optical microscope. The hardness values are measured by the micro-hardness device and the phases created on the layer are determined by the XRD method. In XRD analysis, feB, fe2B, crb and MnB phases were found to be formed over the tube layer. As a result, the thickness values of the pipeline layer obtained in rubbed steel have been observed with the increase in thickness values, piping time and temperature. In addition, the thickness values of the pipeline layer varied depending on the chemical composition of steel. The original hardness values of the AISI 5140 and AISI 420 steels, respectively, 265 HV0,05 and 340 HV0,05 were seen as a result of the piping process, up to 1843 HV0,05 and 1972 HV0,05. The AISI 5140 and AISI 420 steel tuber layers were created and the thickness and growth kinetics of the tuber layer were studied. The activation energies of bored AISI 5140 steel and AISI 420 steel were identified as (Q) 194, 951 and 206,161 kJ/mol, respectively. The adhesive characteristics of the rubber layer have been analyzed using the Daimler-Benz Rockwell-C adhesion method. According to the adhezyon test results, the pipe layer’s adhesive resistance has decreased with increased pipe temperature and pipe time.

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