烧结制度对三维通孔不锈钢泡沫性能影响

The effects of sintering schedule on the performance of stainless steel foam with 3-D open-celled network structure

研究了烧结制度对具有三维通孔网状结构泡沫不锈钢的线收缩率、开孔孔隙度、抗弯强度的影响。研究发现:随着烧结温度的升高和保温时间的延长,烧结制品的线收缩率增大,开孔孔隙度减小;随着烧结温度的升高,烧结制品抗弯强度先是增大,然后有所降低,保温时间的延长有利于提高抗弯强度,但影响没有烧结温度强烈。前驱体在1 260℃温度下烧结30min,可制得孔径大小为1mm左右、具有良好三维通孔结构的不锈钢泡沫,该泡沫的开孔孔隙度为81.2%,抗弯强度为51.72MPa。

The effects of sintering schedule on the shrinkage, open porosity and bending strength of the stainless steel foam with 3-D opened network structure were investigated in this paper. The experimental results show that the shrinkage of the sintered product increases and the open porosity decreases with the increase of sintering temperature and the prolongation of the soaked time; the bending strength of sintered product firstly rises and then declines with the sintering temperature rising; the prolongation of soaked time is favorable to raise the bending strength, however, the effect of soaked time on bending strength is less remarkable than that of sintering temperature. When the precursor is sintered at 1260℃ for 30min , the stainless steel foam with favorable 3-D and open ceils network structure can be obtained, of which the aperture is about 1mm, the open porosity is 81.2 % and the bending strength is 51.72MPa.