(中南大學 材料科學與工程系， 長沙 410083)
摘 要: 研究了Al-8Pb-3Si-2Sn-1Cu(質(zhì)量分數(shù)，%)合金的顆粒在擠壓-軋制成形時，合金的微觀結構與性能。結果顯示： Al-Pb合金顆粒中Pb分布在枝晶間隙或“嵌”在基體中；Al-Pb合金顆粒經(jīng)擠壓-軋制及隨后的退火，合金板材中低熔點Pb，Sn第二相均勻地呈球形分布；合金強度(σb)可達95.8*#MPa,延伸率(δ)可達16.3%；在變形過程中，Al-Pb合金顆粒的新生表面層中低熔點Pb，Sn第二相的重新分布影響材料的強度與延伸率。
關鍵字: 鋁-鉛合金； 微觀結構； 性能
Al-Pb alloys in process of achieving sheet from particles
（Department of Materials Science and Engineering,
Central South University, Changsha 410083, P.R.China）
Abstract:The micro-structure and mechanical properties of Al-8Pb-3Si-2Sn-1Cu(mass fraction, %) in the process of achieving the sheet from particles by extrusion, rolling and heating were investigated .The results show: the low smelting point phase including lead and tin is well-distributed; the strength and stretch rate of the finished product respectively are 95.8MPa and 16.3%; the existing situation of lead and tin in the new interface of particles is changed by deformation, which affects the strength (σb) and stretch rate (δ%) of the finished product.
Key words: Al-Pb alloy; micro-structure; mechanical properties
