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采用元素粉末作为12%(体积)SiCp/2024Al复合材料的原料,研究了冷压后经真空烧结获得预制坯,再对坯料进行热变形的制备工艺,通过金相观察、力学性能测试等手段研究了12%(体积)SiCp/2024Al复合材料在热变形前后的显微组织及力学性能。结果表明:经过热变形的12%(体积)SiCp/2024Al复合材料组织的均匀性得到了明显改善,显微孔洞和SiC颗粒团聚现象明显消除。复合材料的抗拉强度、屈服强度和延伸率较变形前有普遍提高。热变形改善了SiCp颗粒分布均匀性,致密度和硬度也进一步提高。
Using elemental powder as the raw material of 12% (volume) SiCp / 2024Al composite, the preparation process of the preform after vacuum pressing and then the thermal deformation of the billet was studied. The metallographic observation and mechanical property test The Microstructure and Mechanical Properties of 12% (volume) SiCp / 2024Al Composites before and after Hot Deformation. The results show that the homogeneity of 12% (volume) SiCp / 2024Al composites after thermal deformation is obviously improved, and the microscopic pores and the agglomeration of SiC particles are obviously eliminated. The tensile strength, yield strength and elongation of composites are generally higher than those before deformation. Thermal deformation improved SiCp particle distribution uniformity, density and hardness also further improved.