Compared with cast roller/segment, composite overlaying roller/segment has the following advantages:

1) Surface hardness: casting parts with HRC48-52, while composite overlaying parts with HRC58-67.

2) Process: many links for casting parts, while simple process for the composite overlaying parts.

3) Quality: with fine metal microstructure, the composite overlaying roller is with high wear-resistant performance.

4) Economic: the maintenance cost of overlaying grinders will be reduced by 50%.

5) Long life: the life of composite overlaying parts will be 1.3-1.5 times than that of casting parts. While the life of Ceramic cladding parts will be 2-4 times than that of high-chromium iron parts.