Browsing by Author "Zlatuška, Bohumír"
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- ItemMikromagnetická strukturoskopie výfukových ventilůZlatuška, Bohumír
- ItemMikromagnetická strukturoskopie výfukových ventilů(Technická Univerzita v Liberci, 2010) Zlatuška, Bohumír; Skrbek, BřetislavThis bachelor work tie together on previous diploma work conversant of changes austenitic valve steel during operational exposition. Result of measurement have serve for examination of application methods measuring residual magnetism to operating degradation in the area of valve stem and cones. Theoretic part is divided on two circuits. On material circle that the deal with used materials of valves and their degradation, further circle of non - destructive testing material intented on keystone of strukturoskopy methods in those work used. Spot sample valves plus way of measuring with exact position on valves were described in experimental parts. The metering went ahead apparatures measuring permeability and remanent intensity magnetic field. Then retrieve data was interpretation in the form of graphs for spot sample. Of them were choiced critical section of valves, which were submitted hardness test and metallographical classification textures.