Customer Login:

Duplex cast steel back-up rolls are made with double poured process with the addition of Ni, Cr, Mo and adopting special heat treatment the shell structure is tempered sorbite, bainite and a small amount of uniformly distributed fine carbide. The material of core and neck of these duplex cast steel back-up rolls are of high quality low carbon steel and low alloy steel. Therefore it possesses the advantage of high resistance to wear, sufficient resistance to spalling and of high toughness.

Microstructure:

	APPLICATION:
	Duplex cast steel back-up rolls are suitable for the roughing and finishing stands of all types of cold and hot strip mills. This kind of rolls is also applied in carious types of plate and heavy plate mills and Steckel mills.
	Microstructure:
	The Microstructure of working layer is: Temper sorbite Bainite +Temper sobrite
Chemical Composition(%) Symbol C Si Mn Cr Ni Mo DCS-1 0.6-1.0 0.3-0.8 1.4-2.4 1.4-2.0 0.8-1.2 0.2-0.6 DCS-2 0.6-1.0 0.3-0.8 1.4-2.4 1.6-2.2 0.8-1.2 0.2-0.6 DCS-3 0.6-1.0 0.3-0.8 1.4-2.4 1.8-2.4 0.8-1.2 0.2-0.6 DCS-4 0.3-0.8 0.3-0.8 0.4-0.8 2.5-3.5 0.6-1.2 0.4-1.0   Hardness (HS) Symbol DCS-1 DCS-2 DCS-3 DCS-4   BARREL 50-60 55-65 60-70 65-75 Neck 25-45 25-45 25-45 25-45    Mechanical Properties: Type Unit Shell Neck   Tensile Strength MPa 1200-2000 Min 400 Yeild Strength MPa 1000-1400 Min 200 Elongation % 2-10 10-30 Contraction % -- 15-40 Impact Value kgf.m/cm² Min 7 Min 24   The Capacity of Making: Diameter of barrel (mm) Length of barrel (mm) Net weight (t) £X900-£X1800 1000-3200 80