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Forged Steel Roller Our company is specialized in manufacturing various kinds of forged steel roller, shaft and other metallurgy equipment. The overall production capability is ten-thousand tons containing three thousand tons forged steel roller. Our mainly products includes cold rolling and forged steel working rollers,intermediate rollers,supporting rollers,skin pass rollers and straightening rollers, forged steel and hot rolling working roller. The materials of old rolling and forged stee rollers contain 9Cr2Mo,86CrMoVT,MC3,MC5,Cr12Mo1VCo etc.,moreover, hot rolling and forged steel rollers contain 60CrMnMo,70Cr3Mo etc..Our can rationally select material in accordance with our users'requirements and their rolling mill condition. Technology parameter of cold rolling and forged steel A,Max Diameter of roll body¦2000mm B,Materials¦ 86CrMoV7,9Cr2Mo,9Cr2W,MC3(3%Cr),MC5(5%Cr) of GB/T13314-97, Semi- High Speed Steel etc.. C,Work hardness¦ Surface hardness of work roll body (HSD)¦ Order No. Surface hardness of roll body Usage 1 ≥95 Skin rolling machine base, working roll of finish rolling machine base 2 90-96 Metal plate, cold rolling work roll of strips 3 75-90 Metal plate, rough rolling work roll of strips Surface hardness of work roll neck (HSD)¦ Order Number surface hardness of roll neck 1 30-50 2 50-65 3 75-90 Reasonable Soft width of two sides of roll body (MM) Length of roll body ≤300 301-600 601-1000 1001-2000 ≥2000 Reasonable Soft width of each side of roll body≤ 30 50 60 65 80 D,Effective hardening depthof work rolls d-1,Classifications according to diameter of roll body¦ order diameter of roll body (mm) hardness of roll body surface (HSD) Effective hardening depth (≥mm ) 1 ≤300 ≥95 6 90-96 8 75-90 10 2 301-500 ≥95 7 90-96 12 75-90 14 3 >500 ≥95 8 90-96 13 75-90 15 d-2,Classifications according to materials¦ Order number Material Depth of Hardness (mm) 1 Series-2%Cr 12-18 2 Series MC3-3%Cr 18-35 3 Series MC5-5%Cr 20-40 E,Technology requirements of production process E-1. Machining according to the drawing. E-2. Test of surface dimensions according to drawing,roughness test according to roughmeter. Ultrasonic testing according to GB/T13315-91 A grade, Surface magnetic particle test according to JB/T5000.15-1998 4 grade. Hardness test according to Leeb hardness tester. E-3. Two steps of heat treatment¦ e.3.1. Heat treatment according to vertical pit furnace,improve work statement,adjust mechanical properties,prepare for terminal heat treatment(surface quench) e.3.2 Surface quenching is processing on dual-frequency quenching machine,which satisfy the requirements of surface hardness and depth of hardening level. e.3.3 Tempering is processing on bellows furnace,the purpose is for cancelling the stress of surface quenching and stress of processing.