关键词: 高铬铸铁/碳钢, 热轧, 结合界面, 微观组织

Abstract: The carbon steel and high-chromium cast iron plates were symmetrically cladded with a six-layer billet， and then multi-pass hot-rolled to prepare a wear-resistant composite plate at a temperature of  1 200 ℃ with 30% and 60% reduction rates.The microstructure of the samples was observed by SEM.The experimental results show that the plate deformations after hot rolling are straight and warping-free.Due to the coordinated deformation and stress release of the soft carbon steel during hot rolling， the sensitivity of hot deformation cracking of high chromium cast iron is reduced， and the brittle high chromium cast iron layer achieves a certain degree of thermal deformation.The two material interfaces with good quality， there is no discernable interfacial interlayers and gaps and other defects.Energy dispersive spectrometer（EDS） tests find that a transition zone free of carbides on the high-chromium cast iron sides and the hardness values on both sides of the interface continuously changes indicates metallurgical bonding between the two materials.

Key words: high-chromiun cast iron/low-carbon steel, hot rolling, interface, microstructure