离心浇铸挤压复合钢管界面组织与性能

采用离心浇铸挤压工艺制备了20Cr/1Cr18Ni9Ti复合钢管.通过扫描电镜研究了试制复合钢管界面区域的显微组织,利用拉伸实验和热疲劳实验测试了其力学性能.结果表明,采用离心浇铸挤压工艺生产的复合钢管实现了界面完全冶金结合,界面结合强度大大提高,界面处存在的过渡区增强了复合管的加工、使用性能.采用此新工艺生产的复合钢管具有较好的组织和性能,并且工序简短,生产成本低.

Interfacial microstructure and properties of clad steel pipes by centrifugal casting and extruding

Clad steel pipes of 20Cr/1Cr18Ni9Ti were prepared by centrifugal casting and extruding. The interracial microstructure of the preproduction clad steel pipes was analyzed by SEM and the mechanical properties were tested by tensile test and thermal cycling test. The results show that the clad steel pipes get completely metallurgical bonding interface with greatly increased bonding strength and their processability and service performance are improved due to transversal area in the interface. It is indicated that not only the centrifugal casting and extruding process can be used to produce the clad steel pipes with better microstructure and properties, but also its working procedure is simple and its production cost is low.