(中南大学 冶金科学与工程学院， 长沙 410083)
摘 要: 研究前驱体中浆料浸入量与不锈钢粉末粒径对具有三维通孔网状结构不锈钢泡沫制品的开孔率和抗弯强度的影响。 研究发现： 随前驱体中浆料浸入量的增加， 泡沫制品的抗弯强度逐渐提高， 开孔率有所降低； 而随着粉末粒径的减小， 泡沫制品的抗弯强度显著增大， 其开孔率呈轻微降低的趋势。 当将44 μm的316L不锈钢粉末与添加剂配成料浆浸入20ppi的聚氨酯海绵中， 制成浸入量0.5 g/cm3的前驱体， 然后在(1 260±2) ℃时烧结30 min， 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， 该泡沫的开孔率为81.2%， 抗弯强度为51.72 MPa。
关键字: 不锈钢泡沫； 三维通孔； 开孔孔隙度； 抗弯强度
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract: The effects of the slurry loading and particle size of the stainless steel powder in the precursor on the open porosity and bending strength of stainless steel foams (SSFs) with 3-D open cells networks structure were investigated. The results show that the SSFs' bending strength gradually increases and the open porosity falls with increasing the slurry loading in precursor; the bending strength remarkably improves and the open porosity reduces little by little with the particle size of stainless steel powder minishing. The 316L stainless steel powder and the additive sol are mixed to make slurry, subsequently the slurry is immerged into the sponge to obtain the precursor, in which the slurry loading is 0.5 g/cm3, and then the precursor is sintered at the temperature of (1 260±2) ℃ for 30 min, a stainless steel foam can be obtained, which has good 3-D open cells network structure, aperture of about 1mm, open porosity of 81.2% and bending strength of 51.72 MPa.
Key words: stainless steel foam; 3-D open cells structure; open porosity; bending strength
