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采用真空烧结法制备出TiC颗粒增强316L不锈钢复合材料.通过对试样进行光学显微分析并测定其相对密度和拉伸性能,研究了增强相含量和模压压力对复合材料的致密化和拉力学性能的影响,并对断口形貌进行分析.结果表明:添加TiC颗粒有利于复合材料的烧结致密化;TiC颗粒的体积分数对复合材料的拉力学性能有较大影响,当TiC的体积分数从0%增加到10%时,复合材料的抗拉强度从543MPa提高到655MPa,而断裂应变却从0.325减至0.052;在较低的模压压力下,提高模压压力有利于复合材料的相对密度、抗拉强度的增加;但过高的模压压力会使试样在烧结后残余封闭孔隙,降低复合材料的塑性性能和抗拉强度.当模压压力为500MPa时,可得到相对密度高、组织致密、增强相颗粒分布均匀、拉伸性能良好的复合材料.
TiC particle reinforced 316L stainless steel composites were prepared by vacuum sintering.The optical density of the composite was measured by optical microscopic analysis and the relative density and tensile properties of the composites were studied.The densification and tensile mechanics The results show that adding TiC particles is beneficial to the densification of the composites. The volume fraction of TiC particles has a great influence on the tensile properties of the composites. When the volume fraction of TiC increases from From 0% to 10%, the tensile strength of the composite increases from 543MPa to 655MPa, while the fracture strain decreases from 0.325 to 0.052. At lower molding pressure, increasing the molding pressure is advantageous to the relative density of the composite, But the increase of compressive strength will make the sample remain closed voids after sintering and reduce the plasticity and tensile strength of the composite.When the molding pressure is 500MPa, Phase particle distribution, good tensile properties of composite materials.