The diploma thesis describes the process of measuring thermal properties of stainless steel 17 4 ph (W.nr. 1.4542) with the transient planar source method (Hot disk ®). All measurements were performed in accordance with the ISO 22007-2 standard. Thermal properties such as: thermal conductivity, thermal diffusivity and specific heat were considered and measured. Explanations and descriptions of the TPS method for measuring thermal properties are also included as well as a brief explanation of other methods for measuring thermal properties.
Measurements were performed with the Hot Disk TPS 2200 instrument located in the laboratory of the Chair of Heat Engineering, Department of Materials and Metallurgy, Faculty of Natural Sciences and Engineering, University of Ljubljana.
The measured thermal properties of 17-4ph steel (solution annealed, hot rolled, air cooled) at room temperature are: thermal conductivity 12,90 ± 0,04 W/(m K), thermal diffusivity 3,7 ± 0,16 mm2/s, and volumetric specific heat 3,36 ± 0,02 MJ/(m3 K) which corresponds to the accuracy of the method. If we compare the obtained results with the data from the technical specifications of 17-4 ph steel, we can conclude that the measured thermal properties are within the range stated by the manufacturers.
The diploma thesis also generally describes the properties of 17-4 ph steel.
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