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For example, when the chemical composition and temperature gradient are constant(black corundum), the order of the change of the growth rate is as follows: the interface morphology changes from dentate to cellular, and then from cellular to dendrite; the frequency of graphite branching increases, the size gradually becomes shorter and thinner, and the interlayer spacing decreases(fused aluminium oxide); The distribution tends to be disordered.

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Because the elements in gray cast iron affect the stability of the interface by various mechanisms(brown fused alumina price), serrated growth interface rarely appears in the non unidirectional solidification process. Moreover, the amount of eutectic grains in gray cast iron is much more than that in pure iron carbon alloy or pure iron carbon silicon ternary alloy(black fused alumina). Graphite grows along the direction of heat flow, with few branches and uniform distribution. 

(white grain aluminum oxide manufacturers united states)The properties and contents of the common elements and alloying elements also affect the interface morphology and solidification structure(white aluminum oxide). The phosphorus content of the above samples increased from 0.047% to 0.105%, and the growth rate remained unchanged (72mm / h)(100 grit aluminum oxide). Some of the endogenetic grains are not completely combined with each other and are filled with high phosphorus melt rich in low melting point.

This shows that some people have poured molten iron into the centrifugal casting mold which has repeatedly changed the rotation direction and kept it completely solidified(white aluminum oxide powder). In the solidified samples, it is found that some graphite spheres which have grown to a certain size are connected with each other(120 grit aluminum oxide harbor freight), and the iron content in the joints does not exceed the normal level, indicating that iron does not separate the associated stone stars.(white grain aluminum oxide manufacturers united states)

Compared with pure iron carbon alloy, the cellular interface appears in gray cast iron at a very low growth rate(white aluminum oxide 80 grit). When the melt contains elements with small partition coefficient and can improve the undercooling degree of the interface, the number and size of the endogenous grains precipitated before the interface increase, and the interface tends to be chaotic(black synthetic corundum). The endogenous growth occurred in the supercooled region.

(white grain aluminum oxide manufacturers united states)When the sulfur content is high(white fused alumina), the critical growth rate of serrated interface changing into cellular interface and cellular interface changing into dendrite interface decreases. No matter whether the hot metal is hypoeutectic, eutectic or hypereutectic, spheroidal graphite has been directly precipitated from molten iron before Eutectic Transformation(pink fused alumina), that is, spherical graphite is directly precipitated from liquid phase.

In addition, a large number of fine graphite balls with a diameter of about 1 um can be seen in the hypereutectic and hypoeutectic cast iron(aluminium oxide polishing powder). The results show that with the increase of phosphorus content, the endogenous grains on the interface increase significantly. If the graphite ball grows in the solid phase, and the growth direction of graphite changes with the change of interface morphology; of course(80 grit aluminum oxide blasting media), this will not happen.

This kind of experiment shows that the undercooling degree of eutectic reaction of nodular cast iron is significantly increased due to the addition of spheroidizing elements(pink corundum). The difference in the content of graphite and austenite, the interface disturbance increases, the different nucleation and growth modes of the eutectic lead to the crystallization of the two phases outside the symbiotic zone and are separated in space and time(silicon carbide 180 grit).(white grain aluminum oxide manufacturers united states)