研究了ＳｉＣ含量及其分布、温度与变形速度等因素对ＳｉＣ颗粒增强金属基复合材料（ＰＲＭＭＣｓ）高温挤压与室温力学性能的影响．结果表明：挤压力随行程呈阶段性变化特征，材料致密度影响镦挤填充阶段变形，温度与挤压速度对挤压力影响较大；挤压变形可使材料的基体连续，增强体ＳｉＣ颗粒分布均匀，梯度层间界面消失；材料的真实应力－应变曲线符合抛物线规律；ＳｉＣ含量对这类材料的力学性能有较大影响，ＳｉＣ分布方式对材料抗拉强度和塑性的影响要比对刚度的影响大． The effects of SiC content and its distribution, temperature and deformation rate on the high temperature extrusion and room temperature mechanical properties of SiC particle reinforced metal matrix composites (PRMMCs) were investigated. The results show that the extrusion force varies stepwise with the stroke. The density of the material affects the deformation during the upsetting and filling stage, and the temperature and extrusion speed have a great influence on the extrusion force. The extrusion deformation can make the matrix of the material continuous and reinforce the SiC The particle distribution is uniform and the interface between the gradient layers disappears. The true stress-strain curve of the material conforms to the parabolic law. The SiC content has a great influence on the mechanical properties of these materials. The influence of SiC distribution on the tensile strength and plasticity The impact of stiffness.