摘要
利用自行研制的Gasar连铸装置,成功拉制出不同Zn含量的藕状多孔Cu-Zn合金试样,并研究了Zn含量和下拉速率对气孔结构的影响.结果表明:在多孔Cu 2Zn合金中,随下拉速率的增加,孔隙率略有增大,而平均孔径逐渐减小.随Zn含量的增加,受糊状区增大的影响,气孔结构的规则性和均匀性变差,气孔直径变大,而气孔率呈现先减小后增大的趋势.
A continuous casting technique was developed to fabricate lotus-type porous alloys. Lotus-type porous Cu-xZn （x=2, 6, 10, mass fraction, %） alloys were successfully fabricated by using the continuous casting technique under a hydrogen gas pressure of 0.6 MPa at various transference velocities. The effects of transference velocity and Zn contents on the porosity and pore diameter were investigated. It shows that, for the porous Cu 2Zn alloy, an increased transference velocity will result in a slightly increased porosity and a decreased average pore diameter. Addition of Zn into pure Cu, on the other hand, will result in an increased average pore diameter. Nevertheless, the pore morphology becomes more and more inhomogeneous with increasing Zn content, and the porosity tends to firstly decrease and then increase. Such tendencies are correlated with the Zn content and the corresponding width of the mushy zone.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第6期757-762,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金委员会-云南省人民政府联合基金重点项目u0837603
国家自然科学基金项目51164018资助~~
