Zlepšení vlastností lité Cr-Ni oceli DIN 1.4865 přísadou inokulantů

at high temperature application. The properties
of these alloys could be strongly affected by the
base structure. It has been tested on superalloys
that lowering of the pouring temperature
together with the addition of grain refiners
leads to the improvement of the grain size by
up to 56% [1]. Plenty of existing works deal
with the evaluation of macrostructure,
microsegregations and mechanical fatigue.
It has been rarely tested the impact of refining
on the resistance to the thermal fatigue.
Thermal fatigue resistance (TFR) at 950 °C
was tested on the refined and non-refined
samples respectively. TFR properties
of the refined structure were improved.
Microstructure changes and hot tensile
properties were reviewed as well.