离心铸造复合辊材料及技术研究进展

Recent Progress in Materials and Technology of Centrifugal Casting Composite Roller

近年来,低成本、长寿命、高生产效率是复合辊技术的主要发展方向。列举了一些典型的离心铸造复合辊的工业部件,如双金属复合轧辊、磨辊辊环,并对国内外不同工艺、不同材料的辊环性能进行对比,发现离心铸造复合辊性能优良、寿命高,在水泥、矿山行业中得到广泛使用。综述了复合辊的材料选择以及技术发展,指出采用球墨铸铁、高铬铸铁、高锰钢、高速钢等多种材料复合的方式可以提高不同工况下工件的使用寿命,降低成本。总结了冷却速率、浇注温度、离心转速、浇注时间等工艺参数对离心铸造颗粒增强金属基陶瓷复合辊组织和性能的影响。最后,提出了目前离心铸造复合辊存在的主要问题及可能的发展方向。

In recent years,low cost,long life and high production efficiency are the main development directions of composite roll technology.Some typical industrial components of centrifugal casting composite rollers,such as bimetallic composite roller and grinding roller ring are listed.By comparing the properties of roller rings with different materials and processes at home and abroad,it is found that the centrifugal casting composite roller has excellent performance and long life,and is widely used in cement and crushing industry.In this paper,the material selection and technical development of composite roller are summarized.The composite method of ductile cast iron,high chromium cast iron,high manganese steel,high speed steel and other materials is introduced,which can improve the service life of the workpiece under different working conditions and reduce the cost.The influences of the process parameters such as cooling speed,pouring temperature,centrifugal speed,pouring time on the microstructure and performance of metal-based ceramic composite roller reinforced by centrifugal casting particles are summarized.Finally,the main problems and possible development direction of centrifugal casting composite roller are put forward.