(西南鋁業(yè)集團(tuán)有限責(zé)任公司， 重慶 401326)
摘 要: 研究了Fe和Si雜質(zhì)元素和Cu元素含量、 合金中氫含量和鈉離子含量、 晶粒細(xì)化以及鑄錠高溫均勻化處理對(duì)7B04合金斷裂韌性的影響。降低Fe和Si雜質(zhì)元素及調(diào)整合金主要成分Cu含量， 可以減少難溶粗大硬相質(zhì)點(diǎn)和過(guò)剩相； 降低合金氫含量和鈉離子含量可以降低氫脆和鈉脆; 加強(qiáng)晶粒細(xì)化可以獲得細(xì)小晶粒組織； 進(jìn)行高溫均勻化處理促使粗大第二相質(zhì)點(diǎn)溶入基體。 這些措施使合金獲得高純化、 高純凈化、高均勻化和非常細(xì)小的晶粒， 從而使合金的斷裂韌性得到較大提高。
關(guān)鍵字: 7B04合金； 斷裂韌性； 高純化； 高純凈化； 高均勻化; 晶粒細(xì)化
LI Cheng-li， ZENG Su-min
（Southwest Aluminium Group Co. Ltd，Chongqing 401326， China）
Abstract:The effects of Fe and Si impurity elements and Cu content, the hydrogen and sodium ion content， grain refinement and high temperature homogenizing treatment on the fracture toughness of 7B04 alloy are studied. Lowering the contents of Fe and Si impurity elements and adjusting Cu content can reduce the coarse hard phases and the excess phases which are difficult to dissolve. Lowering the hydrogen and sodium ion content in the alloy can lower the hydrogen embrittlement and sodium embrittlement. Strengthening grain refinement can get fine grains. High temperature homogenizing treatment prompts the coarse second phase particle to dissolve into the matrix. The results show that high purity, high purification, high homogeneity and supper refined grains are obtained after these measures and the fracture toughness of alloy raises remarkably.
Key words: 7B04 alloy; fracture toughness; high purity; high purification; high homogeneity; grain refinement
