Effect of boron on carbide morphology of high Cr ledeburite steel

The effect of boron-on carbide morphology of high Cr ledeburite steel has b een studied. The results showed that B had obvious influence on eutectic ca rbide morphology in solidification structure and carbide granulation at hig h temperature. The addition of 0.02 similar to 0.05 wt pet B changed carbid e morphology in solidification structure from strip eutectic and rosette eu tectic into divorced eutectic. B accelerated carbide granulation through in creasing unstability and lattice distortion of carbide and element diffusio n, Granular carbide could be achieved when heated at 1150 degrees C for 1.5 h.