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High chrome cast iron roll

      Properties

Thanks to its high content of M7C3 type carbide in the range of 20-30% and discontinuous network distribution of carbide, the roll offers a high wear-resistance performance. The matrix consist of tempered martensitic and sorbite with finely-dispersed secondary carbides (M7C3, M23C6 and M3C types), increasing therefore the wear-resistance of roll, the Cr2O3 enriched oxide film on the roll surfaces is highly resistant to oxidization and plastic strain, making the roll extremely suitable for steel hot rolling process.

              

       Chemical Analysis
Grades
HSC
C
Si
Mn
Ni
Cr
Mo
HCr
60~75
2.3/3.3
0.3/1.0
0.5/1.2
0.7/1.7
12.0/15.0
0.7/1.5
HCr
65~80
2.3/3.3
0.3/1.0
0.5/1.2
0.7/1.7
15.0/18.0
0.7/1.5
HCr
75~90
2.3/3.3
0.3/1.0
0.5/1.2
0.7/1.7
18.0/22.0
1.5/3.0

     

Physical Properties
properties
Barrel
Nick/corel C grey cast iron
Nick/corel C SG cast iron
Tensile strength (N/mm2)
850
200
400
Bending strength (N/mm2)
1300
350
835

 

        Microstructure
           HCr: bainite + martensite + carbide
           HCr: tempered martensite + eutectic carbide + small percentage secondary carbide
           HCr: tempered martensite + eutectic carbide + small percentage secondary carbide
 
        Application
           Work rolls for roughing stands and front finishing stands of hot strip mill, work rolls for wide and medium plate mill

 

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