泡沫铝的熔体半连续发泡制备技术研究

发布时间：2018-04-25 20:49

本文选题：ZL111合金泡沫 + 发泡剂连续分散　；参考：《昆明理工大学》2015年硕士论文

【摘要】：泡沫铝是兼具结构和功能为一体的复合材料,在汽车、航空、生物等领域有广泛的应用前景。但其大规模应用还未能实现,其主要原因与泡沫铝的性价比过低有相关。实现制备孔结构均匀泡沫铝方法的连续化是解决这一问题的有效途径。本文以熔体法制备泡沫铝为基础,用ZL111合金为原料,通过自行设计的发泡剂连续加入分散设备,进行半连续泡沫铝制备研究。获得平均孔径为3-5mm、孔隙率为70-87%孔结构均匀的泡沫铝,并对不同孔隙率的泡沫铝进行压缩性能研究。主要研究结果如下：(1)设计并制造了发泡剂连续加入分散装置一套。(2)通过自行设计的装置对发泡剂连续加入和分散,实现了发泡剂的均匀分散。其工艺参数配置：熔体流出速度6.11g/s,搅拌叶片倾角度为30°,TiH2分散温度为610℃,搅拌速度为3000r/min。(3)通过对ZL111合金泡沫半连续制备实验,成功地制备了孔结构均匀的ZL111合金泡沫,其平均孔径为3-5mm,孔隙率为70-87%。获得了制备ZL111合金泡沫的工艺参数配置：合金熔化及保温温度610℃,Ca含量1.5wt%,合金搅拌保温时间12min,发泡剂送入电机频率9Hz,发泡保温温度605℃,发泡保温时间330s。(4)随孔隙率的提高,ZL111合金泡沫的密实化应变上升,屈服强度以及能量吸收性都下降。孔隙率为76%-85%的ZL111合金泡沫,其屈服强度最高为12.1MPa,能量吸收最高为5.351 MJ/m3。
[Abstract]:Aluminum foam is a composite material with both structure and function as a whole. It has wide application prospects in the fields of automobile, aviation and biology, but its large-scale application has not been realized, and its main reason is related to the low cost performance of aluminum foam. The realization of the continuous foam aluminum method for making holes is an effective way to solve this problem. In this paper, the foam aluminum was prepared by melt method, and ZL111 alloy was used as the raw material. The preparation of semi continuous foam aluminum was carried out by the self designed foaming agent. The foam aluminum with an average pore size of 3-5mm and the porosity of 70-87% pore structure was uniform. The compression properties of the foam aluminum with different porosity were studied. The results are as follows: (1) the foaming agent is designed and made a series of continuous dispersing devices. (2) the foaming agent is uniformly dispersed and dispersed through a self designed device. The process parameters are configured, the flow rate of the melt is 6.11g/s, the angle of the stirring blade is 30, the TiH2 dispersion temperature is 610, and the stirring speed is 30. 00r/min. (3) through the semi continuous preparation of ZL111 alloy foam, the ZL111 alloy foam with uniform pore structure was successfully prepared. The average pore size of the alloy was 3-5mm and the porosity was 70-87%.. The process parameters of preparation of ZL111 alloy foam were obtained: alloy melting and thermal insulation temperature 610, Ca content 1.5wt%, alloy stirring time 12min, foaming. The agent is fed into the motor frequency 9Hz, the foam insulation temperature is 605 C, the foaming time 330s. (4) increases with the porosity, the ZL111 alloy foam's dense strain rises, the yield strength and the energy absorbability decrease. The ZL111 alloy foam with the porosity of 76%-85% is the highest yield strength of 12.1MPa, and the maximum energy absorption is 5.351 MJ/m3.

【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33

【参考文献】