(洛陽工學院 材料科學與工程系，洛陽 471039)
摘 要: 研究了熱處理、壓力加工及定向凝固等熱加工工藝對ZLSi7MgA合金導電性能的影響。研究表明：壓力加工使硅相沿變形方向的相對分布發(fā)生變化；定向凝固工藝可以獲得兩相平行生長的理想柱狀晶組織，其一次軸方向與電場方向一致；提高時效溫度能夠促使G·P區(qū)從 中間相到平衡沉淀相的過渡，消除了沉淀相周圍基體中的畸變。上述工藝均有利于提高合金的導電性能。通過調整時效溫度適當提高ZLSi7MgA合金的電導率，是兼顧合金的強度和導電性， 滿足工程要求的行之有效的工藝方法。
關鍵字: 鋁合金；ZLSi7MgA合金；熱加工工藝；導電性能
ZLSi7MgA alloy electrical conductivity
（Department of Materials Science and Engineering,
Luoyang Institute of Technology, Luoyang 471039, China）
Abstract:The effect of heat working technologies, heat treatment, press working and solidifying alone the definite direction etc. on electrical conductivity of ZLSi7MgA alloy was studied. The results shows that, press working makes the relative distribution of silicon phases alone the deformed direction take place change; the ideal columnar crystal can be obtained by technology solidifying alone the definite direction; the raising aging temperature can impel the transition from middle phases to equilibrium precipitate phases, and eliminate the distortion of matrix round the precipitate phases. Above-mentioned technologies all can raise the alloy electric conductivity. The engineering need can be satisfied to both the strength and electric conductivity through suitable rising ageing temperature to improve the alloy electrical property.
Key words: aluminium; ZLSi7MgA alloy; heat working technology; electrical conductivity
