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Einfluß sintertechnischer Grenzen für die Herstellung von schwingbeanspruchten Bauteilen aus Sinterstahl
Influence of technical limitations in the production of fatigue loaded PM'Components
: Fraunhofer-Institut für Betriebsfestigkeit -LBF-, Darmstadt
In order to extend the already available knowledge on monotonic and cyclic stressstrain behaviour, fracture mechanical and fatigue properties of mostly used sintered alloys Fe-1.5%Cu, Fe-1.5%Cu-0.6%C, Fe2.0%Cu-2.5%Ni and Fe-0.45%P (delta = 6.6 to 7.3 g/ccm) and to determine the influence of technical limitations in the production of fatigue loaded PM'components, this investigation puts emphasis on following topics: - Influence of sintering time, temperature and atmosphere on the behaviour of the alloys Fe-4.0%Ni-1.5%Cu-0.5%Mo-0.6%C and Fe-2.0%Cu-2.5%Ni (delta = 7.1 g/ccm). - Properties of the alloys Fe-2.0%Ni-0.5%Mo-0.4%C, Fe-1.5%Cu-0.6%C and Fe-2.0%Cu-2.5%Ni after powder forging (delta bigger than 7.7 g/ccm). - Behaviour of the alloy Fe-1.5%Cu (delta = 6.8 and 7.1 g/ccm) manufactured from different iron powders RZ 150, NC 100.24, WPL 150 and WPL 150 smaller than 60 mym. - Influence of different batches of the alloy Fe-1.5%Cu (delta = 6.8, 7.1 and 7.4 g/ccm) and their behaviourafter e xposure to salt spray in corrosion protected state and influence of different batches of the alloy Fe-0.45%P (delta = 7.1 and 7.4 g/ccm). - Behaviour of the as sintered and quenched and tempered alloy Fe-0.8%Mn0.95%Cr-0.24%Mo-0.6%C (delta = 7.1 g/ccm). - Variable amplitude of the alloys Fe-4.0%Ni-1.5%Cu-0.5%Mo-0.6%C, Fe2.0%Cu-2.5%Ni (delta = 7.1 g/ccm) and of the above mentioned three powder forged alloys.