Abstract
1. By the method of Auger spectroscopy in combination with ionic pulverization we plotted distribution profiles of the concentrations of phosphorus and of alloying elements in the region of the interface between eutectic carbide and the matrix in cast steel R6M5. 2. In the region of the phase boundary we find higher content of phosphorus, chromium, and vanadium (than in both the matrix and the carbide). The width of the phosphorus segregation on the side of the carbide is about 2 nm, and of chromium and vanadium 4 nm. 3. The phosphorus concentration on the phase boundary of carbide type M2C is almost two orders of magnitude greater than the mean phosphorus concentration in steel.
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