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The mechanism of pack RE|chrome|boronizing and the effects of RE and Cr elements on the formation of RE|chrome|boroinized layer were studied by the aid of thermodynamic calculations and the layers compositions analyses in this paper.The results show that boronizing plays a leading role in pack ER|chrome|boronizing because active RE and Cr atoms are obtained by reducing the solid materials,and then RE and Cr atoms dissolve in the RE|chrome|boronized layer,be fine and close (Fe,Cr,RE)-2B phase in texture,by way of passing the grain boundary chiefly and replacement|spreading separately.The spreading of RE and Cr atoms plays an important role in forming the fine columnar grains and decreasing surface|layer voids of RE|chrome boronized layer.
The mechanism of pack RE | chrome | boronizing and the effects of RE and Cr elements on the formation of RE | chrome | boroinized layers were studied by the aid of thermodynamic calculations and the layers compositions analyses in this paper. The results show that boronizing plays a leading role in pack ER | chrome | boronizing because active RE and Cr atoms are obtained by reducing the solid materials, and then RE and Cr atoms dissolve in the RE | chrome | boronized layer, be fine and close (Fe, Cr, RE) - 2B phase in texture, by way of passing the grain boundary chiefly and replacement | spreading separately.The spreading of the RE and Cr atoms plays an important role in forming the fine columnar grains and decreasing surface | layer voids of RE | chrome boronized layer.