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The organizational structure and properties of HSS rolls
The type of HSS roll’s carbide
The one of significant tendency of roll development is widely applying alloy in rolls material to form different kind of carbide, the kinds, distribution and quantity of carbide decide the quality of rolls.
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Rolls material
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Main type of carbide
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Carbide shape
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Microstructure carbide hardness（HV）
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HSS Rolls
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MC
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VC
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Granular
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2800
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TiC
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Granular
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3200
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NbC
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Granular
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3000
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WC
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Granular
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2400
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M2C
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Mo2C W2C
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Rod-like Feathery
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2000
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M6C
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Fe3W3C
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Herringbone
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1500-1800
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HCI Rolls
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M7C3
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Cr7C3
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Chrysanthemum
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1200-1600
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M23C6
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Cr23C6
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Granular（twice）
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1200
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ICDP Rolls
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M3C
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Fe3C
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Reticular
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840-1100
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mechanical property of HSS rolls:
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Rolls material
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Carbide
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Matrix Hardness（HV）
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Surface HSD
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Tensile Strength
MPa
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Compressive Strength
MPa
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Fracture Toughness Mpa.m1/2
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Compare
Wear Resistance
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Area
%
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Size
um
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15~20℃
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700℃
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HSS Rolls
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10～20
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<100
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650～750
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320
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80～90
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700～900
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2500～3000
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25～28
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4～5
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HCI Rolls
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20～30
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100～150
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450～550
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300
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70～80
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600～800
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1800～2200
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21～34
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2～2.5
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ICDP Rolls
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30～40
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200～500
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430～600
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200
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75～85
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400～600
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2000～2500
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18～25
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1
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