vermicular


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In the present work, experimental and modeling studies show that the cutting force of austempered vermicular graphite cast irons can be controlled with austempering heat treatment and machining parameters.
1%) at the modification of grey cast irons, leads to the obtaining of compacted graphite cast irons (>75% vermicular graphite separations and <25% sferoidal graphite separations) (Fig.
A comparison of the temperature dependent properties and the resulting thermal stress indices for the lamellar graphite cast iron GJL250 and vermicular graphite cast iron GJV450 are shown in Figure 1.
becoming more vermicular with depth; set in a of prominent mottled matrix (orange 7.
It occurs both as encrustations and as powdery green inclusions and masses of vermicular material in other minerals.
0-liter V6 uses four valves per cylinder, has a 90[degrees] bank angle, 90-mm between bore centers, and has a block made from vermicular graphite cast iron, which is 15% lighter than conventional cast iron, giving the 17.
The producing of the pig irons, used in order to modify and to obtain vermicular graphite, was made in an induction furnace, of a low frequency and with a capacity of 250 kilos and the treatment of the cast irons in order to obtain the compacting of the graphite separations, was made in a casting pot with 1000 kilos capacity, by applying the Sandwich procedure.
Some of the pearlitic ductile iron plates were low in magnesium content (Table 2), with a resulting structure consisting in a mixture of nodular and vermicular graphite particles in a pearlitic matrix.
The crankcase is made from gray cast iron combined with GJV-450 vermicular graphite, which makes this assembly 40% more rigid and 100% more fatigue resistant than plain gray cast iron.
When ductile iron is produced, a small coupon is poured at the end of each heat to verify that the graphite has precipitated in nodular form rather than in vermicular or flake form.
The structure of EG is loose, porous and vermicular, and therefore nanocomposites prepared from polymer and EG show poor mechanical properties (14-17).