1.4 轧辊的主要生产过程.ppt

1、Cast Rolls Main Manufacturing Processes 铸造轧辊的主要制造过程,Nov. 2009 09年11月,Single Static Casting 单一静态浇铸法 Double Static Casting 双重静态浇铸法 Centrifugal Casting 离心浇铸法 CPC / HIP Systems 连续浇铸外层成形 法/ 热等静压法,Roll Manufacture 轧辊的制造,Single Static Casting 单一静态浇铸法,Method used for: 该种浇铸法常用于： Back Up Rolls in Chromium Ste

2、el 材质为铬钢的支撑辊 Work Rolls in Alloyed Nodular Cast Iron and in Low Alloyed Steel 材质为合金球墨铸铁和低合金钢的工作辊,Double Static Casting 双重静态浇铸法,Back Up Rolls in High Alloyed Steel 材质为高合金钢的支撑辊 Work Rolls in High Alloyed Cast Iron 材质为高合金铸铁的工作辊,Method used for: 该种浇铸法常用于：,Static Casting 静态浇铸法,Advantages: 优点： Low investm

3、ents in the foundry 铸造车间的投入少,Disadvantages: 缺点： Risks of shrinkage cavity and segregations mostly for single process 单一静态浇铸主要存在产生缩孔和偏析的风险 Casting more difficult for double process in addition to be expensive (+40% liquid melt) 双重静态浇铸难度大且花费高（需增加40%的液态金属量） Casting does not allow combinations of grades

4、 different for shell and core metal in compound rolls 静态浇铸不能浇铸有工作层和芯部材料之分的复合轧辊,Centrifugal Casting 离心浇铸法,Horizontal Casting 卧式浇铸,Vertical Casting 立式浇铸,External Shell 外部工作层 Work Layer 工作层,Fill Up Material: N/L Cast Iron Statically in Hc System Centrifugally in Vc System,芯部球墨铸铁或灰铸铁材料的浇铸： 在卧式系统中进行静态浇铸

5、在立式系统中进行离心浇铸,Centrifugal Casting 离心浇铸法,Advantages：优 点 High productivity 生产率高 Flexibility about alloy choice (shell & core material) 合金选择灵活（工作层&芯部） No internal shrinkage defects 无内部缩孔缺陷,Method used for: Work Rolls for Roughing & Finishing Stands,使用范围：,粗轧和精轧机架的工作辊,Molten Metal 液态金属,Core Material 芯部材料,

6、Shell Material 工作层材料,Forged Steel 锻钢,High Strength Material 高强度材料,Pouring Furnace 浇铸炉,Molten Metal 液态金属,Core Material 芯部材料,Shell Material 工作层材料,Tundish 中间包,Drawing Direction 拉拔方向,Melting Furnace 熔炼炉,Continuous Pouring for Cladding 连续浇铸外层成形法,High solidification rate 凝固速率快 Good homogeneity through out

7、 the shell but Low productivity 整个工作层的材料均匀性好但生产率低,Mold 结晶器,Hot Isostatic Pressing 热等静压法,Sintering of metal powder at high temperature (1000C) under high pressure (100 MPa) 在高压（100MPa)高温(1000C)下对金属粉末进行烧结,Very fine microstructure 非常细密的显微结构 Freedom in material selection 材料选择自由 but 但是： Expensive process 生产费用高 Technology not suitable for la