摘要
采用410L不锈钢粉末与增塑剂的混合物，用增塑挤压烧结法制备了不锈钢金属蜂窝，研究了挤压成形过程、烧结温度和时间对蜂窝组织结构的影响及蜂窝的压缩性能。结果表明，合适的挤压料配比为70％～80％，挤压力为9．5～11MPa；随烧结温度、时间的提高，蜂窝的表观密度等结构参数都提高，但温度的影响大于时间的影响；烧结组织由Fe—Cr固溶体、（Fe，Cr），Si和（Fe，Cr）3C组成，最佳烧结参数为1235℃及25min；蜂窝屈服强度与表观密度密切相关；径向压缩为单一层状屈服，最大屈服强度可达40．9MPa（表观密度2．16g／cm^3）；轴向压缩变形为多变形带屈服，最大屈服强度为224．7MPa（表观密度2．02g／cm^3）。
410L stainless steel honeycomb has been made by powder extrusion molding and sintering by using a mixture of stainless steel powder and additives. The extrusion molding, the effects of sintering temperature and time on the macro-structure and micro-structure, and the compressive behavior have been studied. The results show： 1） suitable extrusion pressure and charge ratio of powder mixture are 9.5-11MPa and 0.7 - 0.8 respectively; 2） macro-structure parameters, such as the apparent density, etc. increase with sintering temperature and time, but the effect of temperature on macro-structure is more evident than that of time; 3） sintered microstrueture consists of α- Fe , （Fe, Cr）3Si and （Fe,Cr）3C,and sintering processing is optimal at 1235℃ for 25min; 4） compressive yield strength varies with the apparent density of metallic honeycomb;5） in the transverse direction, the maximum yield strength reaches 40.9MPa （with apparent density 2.16g/cm^3） and the compressive deformation involves single cell layer yielding, however, in the longitudinal direction, the maximum yield strength 224.7MPa （with apparent density 2.16g/cm^3）and the deformation related to a mechanism of multi deformation bands yielding simultaneously.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2006年第5期353-358,共6页
Powder Metallurgy Technology
基金
云南省自然科学基金重点项目(2000E003Z)
云南省自然科学基金项目(2005E00017M)
云南省教学科研带头人培养项目(2004)
关键词
粉末增塑挤压
烧结
不锈钢金属蜂窝
宏观结构
微观组织
力学性能
多孔材料
powder extrusion molding
sintering
stainless steel metallic honeycomb
macrostructure
microstructure
compressive behavior
cellular materials
