1988 Volume 28 Issue 6 Pages 478-484
The hardness of adamite roll materials for hot work rolls depends on their microstructures; the amount and hardness of coarse carbides and the hardness of matrix. The high-hardened adamite roll materials are excellent in wear resistance when the amount of coarse carbides is about 8%, but the wear resistance deteriorates when the amount of coarse carbides \exceeds a critical level.
The reason is considered to be as follows: As the volume of coarse carbides increases, the spacing between coarse carbides decreases and the area of coarse carbides in contact with hot strip surfaces also increases, to induce a partial disintegration of brittle coarse carbides.
The high-hardened adamite rolls with about 8% of coarse carbides have a hardness from Hs 65 to 70 and can be used for hot work rolls with satisfactory results.
