Thixoforming : Semi-solid Metal Processing

Figure 3.21 Element-distribution images (Si, W, Cr, C) of
dimensions 500 500 mm of specimens quenched from 1290 C
(a) and 1330 C (b) of the material X210CrW12. Markings of the
line-scan distances are displayed in Figure 3.23.
boundaries could be measured in the element distribution. The measurements prove
the already determined, by means of calculation, accumulation of chromium,
tungsten and carbon and the depletion of silicon in the eutectic. The element
distribution images in Figure 3.22 also show constant alloying element contents in
the austenite for a continuous measurement, where no significant difference
between the primary grain and the accumulated secondary grain can be seen.
The associated line-scan measurements for specimens quenched from 1290 C
exhibit an erratic change of the carbon and tungsten content around the phase
Figure 3.22 Element-distribution images (Si, W, Cr, C) of
dimensions 60 60 mm of specimens quenched from 1290 C
(a) and 1330 C (b) of the material X210CrW12. The secondary
austenite probably accumulated during quenching is identified
with arrows.
3.4 Structural Parameter Development and Material Selectionj73