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基于多道次局部小变形累积整体成形的思路,采用新型的楔形压制对大尺寸多孔性喷射沉积SiC颗粒增强Al-8.5Fe-1.3V-1.7Si复合材料板坯进行有效致密,对楔形压制致密后的板坯进行多道次轧制制得复合材料板材,对比研究了传统的挤压致密后轧制的工艺。结果表明,楔形压制能产生有效的静水压力,使板坯中的孔洞有效弥合、沉积坯中的弱界面和层状组织得到有效改善,从而使其成形性能得到提高。与传统的挤压后轧制工艺相比,通过楔形压制后轧制,工艺更为简单可行,SiC颗粒分布更均匀,其力学性能也更好。板材室温下的抗拉强度达520MPa,屈服强度为450MPa,伸长率为6.5%。
Based on the idea of multi-pass local small deformation accumulative integral forming, a new type of wedge-shaped press was used to effectively compact the large size porous spray-deposited SiC particle reinforced Al-8.5Fe-1.3V-1.7Si composite slab, After the slab multi-pass rolling composite plate, comparative study of the traditional extrusion compacting rolling process. The results show that the wedge pressing can produce effective hydrostatic pressure, effectively close the holes in the slab, and improve the formability of the weak interface and layered structure in the slab effectively. Compared with the traditional post-extrusion rolling process, the rolling process by wedge pressing is simple and feasible, the distribution of SiC particles is more uniform, and the mechanical properties are better. Plate tensile strength at room temperature of 520MPa, yield strength of 450MPa, elongation of 6.5%.