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球墨铸铁中加入较多的Ni 、Mo 合金能获得优良的贝氏体、马氏体组织，强度高，韧性好，硬度落差小，耐热裂、耐磨、耐表面粗糙性能好。
Thanks to its higher content of N i and Mo alloys,basinite and martensite matrixes with excellent perpormence are produced. There are small changes in hardness.It is extremely efficient in toughness,preserving heat split, preserving surface coarse and abrasion-resistant.
工作层硬度落差 Changes of outer layer in hardness
离心复合（Centrifugal method ）
常法 (Conventional method)
应用范围： 带材热轧机粗、中轧机架，中、小型型钢轧机粗、中、精轧机架，中、小型棒材、线材轧机粗、中轧机架工
作辊。
Scope of application: The roll of the rough ,milling and middle milling stand of ho t －strip mill,the rough,middle and finish
milling stand of middle stand of middle and small section mill and the rough and middle milling stand of
middle and small bar and wire rod mill. HSD35-48＞400MPa HSD35-55＞300MPa 金相组织METALLOGRAPHY ORGANISM
常法Conventional 辊颈硬度
Hardness of roll surface
芯部抗拉强度
Tensile strength of core 机械性能
Mechanical Property
辊面硬度
Hardness of roll surface
HSD45-85HSD50-85离心复合Centrifugal Method
