粉末冶金结合多向锻造制备TiC_p/Mg复合材料的组织和性能研究

Study on microstructure and properties of TiC_p/Mg composite material prepared by combination of powder metallurgy and multiple forging

以TiC粉末和Mg粉为原料,经粉末冶金和多向锻造工艺制备TiC_p/Mg基复合材料。探讨了多向锻造、退火温度对TiC_p/Mg基复合材料组织的影响。采用室温拉伸试验分析多向锻造、退火温度和加入不同质量分数的TiC颗粒对TiC_p/Mg基复合材料力学性能的影响。结果表明,锻前材料组织相对疏松,TiC颗粒分布不均匀、出现团聚现象,而锻后材料组织致密,TiC颗粒团聚现象明显改善,退火后的复合材料中孔隙进一步愈合。多向锻造和退火对复合材料抗拉强度都有不同程度提高;随着TiC质量分数的增加,TiC_p/Mg基复合材料的抗拉强度增加。

TiC particles reinforced Mg matrix composites are prepared by powder metallurgy and multi-directional forging. The composite microstructure is studied with different muhidirectional forging time and annealing temperatures. The effect of TiC particles on the mechanical properties of TiCp/Mg composites is investigated by tension tests at room temperature with different TiC content, multi-directional forging time and annealing temperatures. The results show that relative loose structure, nonuniform distribution of TiC particles and agglomeration appear in the material before forging. While after forging, density is increased, agglom- eration is improved and porosity is decreased after annealing. Tensile strength of TiCp/Mg matrix composites is increased with forging, annealing and mass fraction increasing of TiC.