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将凝胶离心成型工艺应用于316L-TiC复合粉末的坯体成型,研究了固含量对316L-TiC复合粉末浆料流变性的影响以及引发剂的加入量对粉末浆料固化时间的影响,分析了凝胶离心成型工艺中离心转速与316L-TiC坯体的密度和强度的关系。结果表明:以油酸作分散剂,制备稳定且流动性好的浆料的最佳固含量为55%(体积分数);引发剂的加入量为0.7%(占预混液的质量分数),采用自行设计的离心成型机,选择最佳转速3000r/min,制备出的坯体密度高、无残留气孔,相对密度64.3%,强度26.3MPa。坯体经真空脱胶1380℃烧结保温1h制备出316L-TiC合金管,烧结体收缩均匀无变形,TiC颗粒呈均匀分布。
The centrifugal molding process was applied to the forming of 316L-TiC composite powder. The effects of solid content on the rheological properties of 316L-TiC composite slurry and the effect of initiator addition on the solidification time of powder slurry were investigated. The relationship between the centrifugal speed and the density and strength of 316L-TiC green body during the gel centrifugal molding process. The results showed that the optimum solid content of the slurry prepared by using oleic acid as dispersant was 55% (volume fraction), the amount of initiator was 0.7% (the mass fraction of premix) Centrifugal machine of its own design, select the best speed 3000r / min, the blank prepared by the high density, no residual porosity, the relative density of 64.3%, the intensity of 26.3MPa. The green body was vacuum degummed at 1380 ° C for 1h to prepare a 316L-TiC alloy tube. The sintered body was uniformly deformed without shrinkage and the TiC particles were evenly distributed.