一、概述 自从1932年德国用立式离心机第一次制造轧辊以来,直到1968年,世界上才第一次用卧式离心机生产了复合轧辊。八十年代我国用卧式离心机铸造成功了1700精轧机 (F4-7)工作辊。1982年,由我厂用卧式离心机生产了一批轧制巧克力粉的辊筒,净重617公斤,长1455mm,外经400mm,内径250mm。要求表层硬度HS80,筒壁外层材质是高镍铬钼合金铸铁,化学成分是:C3.2—3.4、Si0.9—1.1、Mn0.6—0.9、P<0.1、S<0.05、Ni4.2—4.6、Cr1.5—1.8、Mo0.3—0.5。金相组织如图1。内层材质是 I. Overview Since 1932, the first roller manufacturing in Germany with a vertical centrifuge has been the world’s first horizontal centrifuge to produce composite rolls until 1968. In the 1980s, China’s horizontal centrifuge casting success 1700 finishing mill (F4-7) work roll. In 1982, I produced a number of horizontal roller centrifuges rolled chocolate barrels, net weight 617 kg, length 1455mm, foreign 400mm, diameter 250mm. Requires surface hardness HS80, the outer wall material is high nickel chromium molybdenum alloy cast iron, chemical composition is: C3.2-3.4, Si0.9-1.1, Mn0.6-0.9, P <0.1, S <0.05, Ni4. 2-4.6, Cr1.5-1.8, Mo0.3-0.5. Metallography as shown in Figure 1. Inner material is