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PF 302

The forged steel rolls for hot mills are manufactured with well chosen quality forged steel blanks, special heat treatment is applied to make rolls in satisfactory barrel hardness and hardening depth. While good wearability is obtained, a comprehensive property of high toughness and excellent biting ability is also achieved.
This type of rolls is used in the plate (strip) mills, among the various rolls, the tube rolls is with a high quality and is rich in assortment, complete in specification and wide in application, The technical properties of FSH-10 Butt welded tube mill rolls have satisfactorily met the customer's requirement. The quality of hyperbolic straightening rolls are in the leading position at domestic market, recently the rolls and sleeves for non-ferrous casting mill have also been developed successfully.

Microstructure:

Chemical Composition(%) Symbol C Si Mn Cr Ni Mo v w FSH-1 0.55-0.65 0.17-0.40 0.50-1.00 0.50-1.20 < 0.25 0.20-0.40 -- -- FSH-2 0.55-0.65 0.20-0.40 0.60-1.00 0.70-1.00 1.50-2.00 0.10-0.30 -- -- FSH-3 0.45-0.65 0.20-0.50 0.50-0.90 3.00-3.60 -- 0.40-1.20 0.10-0.35 -- FSH-4 0.60-0.80 0.30-0.80 0.40-0.90 2.50-3.50 0.40-0.60 0.20-0.60 -- -- FSH-5 0.30-0.40 < 0.40 < 0.40 2.20-2.70 -- -- 0.20-0.50 7.50-9.00 FSH-6 0.32-0.43 0.80-1.20 0.20-0.50 4.50-5.50 -- 1.00-1.60 0.30-0.60 -- FSH-7 0.80-0.95 0.25-0.45 0.20-0.55 1.70-2.40 -- 0.20-0.40 < 0.15 -- FSH-8 0.13-0.23 < 0.30 < 1.00 0.80-1.20 -- 0.80-1.20 0.15-0.30 -- FSH-9 0.30-0.42 0.17-0.50 0.25-0.50 1.20-1.60 3.00-3.50 0.25-0.45 0.10-0.25 -- FSH-10 1.45-1.70 < 0.40 < 0.40 11.0-12.5 -- 0.40-0.60 0.15-0.30 --                             BARREL HARDNESS (HS) FSH-1 FSH-2 FSH-3 FSH-4 FSH-5 FSH-6 FSH-7  FSH-8 FSH-9 FSH-10 34-40 35-45 50-60 34-45 65-76 50-58 69-76 38-45 40-50 80-87 55-75 50-60 60-70 60-70 80-87 65-71 80-87 -- -- --   THE CAPACITY OF MAKING Diameter of barrel (mm) Length of barrel (mm) weight (t) £X1020 (Max.) 3500 (max.) 12 (Max.)   APPLICATION OF FORGED STEEL ROLLS FOR HOT ROLLING MILLS MILL TYPE ROLL TYPE FSH 1 2 3 4 5 6 7 8 9 10 Plate mills Primary rolls o o                 Planetary mills Work rolls o Feed rolls o Back-up rolls o Welding tube mills Forming, sizing and vertucal rolls o Seamless tube mills Extruding rolls o o o Straitening rolls o o Non-ferrous plate and strip mills Piercing rolls   o Pushing point rolls o Wrok rolls o o Back-up rolls o o Non-ferrous casting-mills rolls (sleeves)               o o     xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx