Abstract
The Cr—Ni—C phase diagram at the melting point was plotted by a combination of procedures (metallography, x-ray, microprobe, differential thermal analysis, Pirani—Alterthum method, etc.). A general feature of this system is the existence of equilibria between the nickel-based phase and all the other phases. The temperature of the quasibinary (Ni)+(Cr7C3) eutectic was determined to be 1324±6°C. Based on both the phase diagram of the Cr—Ni—C system and the bending strength and Rockwell hardness of the alloys, the optimal composition of the initial carbide ingredient for production of hard alloys based on Cr3C2 with nickel—phosphorus binder was estimated as 13.0–13.3 at.%, substoichiometric with respect to Cr3C2.
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Institute of Problems in Materials Science, National Academy of Sciences of Ukraine, Kiev. Translated from Poroshkovaya Metallurgiya. No. 5/6(395), pp. 13–24, May–June, 1997.
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Bondar, A.A., Maslyuk, V.A., Velikanova, T.Y. et al. Phase equilibria in the Cr-Ni-C system and their use for developing physicochemical principles for design of hard alloys based on chromium carbide. Powder Metall Met Ceram 36, 242–252 (1997). https://doi.org/10.1007/BF02676213
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DOI: https://doi.org/10.1007/BF02676213