Thixoforming of 6066 aluminum alloy by multi-layer spray deposition
来源期刊：中国有色金属学报(英文版)2001年第1期
论文作者：陈振华 张豪 康智涛
文章页码：108 - 114
Key words：thixoforming; multi-layer spray deposition; 6066 aluminum alloy
Abstract: Two thixoforming technologies of 6066 aluminum alloy (Al-1.37Si-1.37Mg-0.77Cu-0.07Mn) produced by multi-layer spray deposition process were studied. The spray-formed materials are of equiaxed and very fine grain (10～20μm). And the grain size coarsens slower than that of conventional casting materials at temperature below the liquidus, which may relate to high temperature particles distributed along the grain boundaries. Extrusion and hot pressing were used as the thixoforming processes respectively. After extrusion the materials show a microstructure of mean grain size below 20μm without obvious recrystallization. The mechanical properties achieved via extrusion and pressing in semi-solid state attain that of common wrought materials with shorter peak aging time of 4～5 h, about half of that in conventional condition.
