| 摘要 |
<p>The alloy of ductile cast iron to which boron has been added is found to have improved annealability as compared to a non-boron treat ductile iron. The addition of boron in amounts between about 10 ppm and 150 ppm by weight effectively combines with nitrogen dissolved in the molten iron and thus serves to minimize the influence of nitrogen on the stability of carbides and pearlite and also forms BN, which can serve as nuclei for the precipitation of graphite.</p> |
