【作者】 马彦东；

【导师】 赵维民；

【作者基本信息】 河北工业大学 ， 材料加工工程， 2000， 硕士

【摘要】 本文采用粉末冶金法，对高熔点泡沫铁的制备进行了研究，成功的制备了孔隙率范围在40-67%、孔径在0.1-3mm之间的高熔点泡沫铁。研究了造孔剂加入量、保温时间、造孔剂粒度对泡沫铁的孔隙率和孔径的影响，并分析了所制备的泡沫铁中孔的成形机理，确立了粉末冶金法制备泡沫铁的成型控制理论。试验中，通过调整造孔剂加入量和保温时间，可以控制泡沫铁的孔隙率在40～67%范围内；通过调整造孔剂粒度的大小，可以控制泡沫铁的孔径在0.1～3mm之间。另外，此研究还对制备的泡沫铁的压性能进行了测试，孔隙率在40－50%时，其屈服压应力可达90MPa以上，而泡沫金属铝的屈服压应力只有几个MPa到30几个MPa，与泡沫铝的压性能相比较有明显的压强度高的优势。 本研究对高熔点泡沫铁的制备及其成型控制研究开辟了一条新的途径，有一定的理论与实践指导意义。更多还原

【Abstract】 The preparation of foamed Fe with high melting point has been studied in this paper by the powder metallurgical method. Foamed Fe with porosity at the range of 40?7% and pore-diameter at the range of 0.1?mm has been successfiully prepared. Effects of the amount and the size of pore-producing agent, temperature-holding time on the porosity and the pore-diameter of foamed Fe have been investigated as well. The pore forming machenism of foamed Fe by this method has been analyzed. The controlling theory of preparation of foamed Fe by powder metallurgical method has been developed. In the experiment, the porosity of foamed Fe can be controlled at the range of 40?7% by way of adjusting the amount of pore-producing agent and temperature-holding time; the pore-diameter of foamed Fe can be controlled at the range of 0.1-3mm by way of adjusting the size of pore-producing agent. In addition, the deformation property of foamed Fe has been tested. The results showed that, when the porosity is at the range of 40?0%, the compression strength of foamed Fe is more then 90 MPa. Compared with foamed Al whose compression strength is only from several MPa to thirty MPa, foamed Fe has obviously higher compression strength. The study has developed a new approach on the preparation of the high melting point foamed Fe and the control of its forming process, which has special significance on theory and practice instruction.更多还原