(中南大學(xué) 冶金科學(xué)與工程學(xué)院， 長(zhǎng)沙 410083)
摘 要: 研究前驅(qū)體中漿料浸入量與不銹鋼粉末粒徑對(duì)具有三維通孔網(wǎng)狀結(jié)構(gòu)不銹鋼泡沫制品的開(kāi)孔率和抗彎強(qiáng)度的影響。 研究發(fā)現(xiàn)： 隨前驅(qū)體中漿料浸入量的增加， 泡沫制品的抗彎強(qiáng)度逐漸提高， 開(kāi)孔率有所降低； 而隨著粉末粒徑的減小， 泡沫制品的抗彎強(qiáng)度顯著增大， 其開(kāi)孔率呈輕微降低的趨勢(shì)。 當(dāng)將44 μm的316L不銹鋼粉末與添加劑配成料漿浸入20ppi的聚氨酯海綿中， 制成浸入量0.5 g/cm3的前驅(qū)體， 然后在(1 260±2) ℃時(shí)燒結(jié)30 min， 可制得孔徑大小為1mm左右、 具有良好三維通孔結(jié)構(gòu)的不銹鋼泡沫， 該泡沫的開(kāi)孔率為81.2%， 抗彎強(qiáng)度為51.72 MPa。
關(guān)鍵字: 不銹鋼泡沫； 三維通孔； 開(kāi)孔孔隙度； 抗彎強(qiáng)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
