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对高铝锌基合金铸态及热处理条件下所获得的组织进行了系统的分析研究 ,并就高铝锌基合金铸态组织转变规律与其硬度变化特征对高铝锌基合金在热处理过程中组织转变机理进行了初步探讨。研究结果表明 :在不同的温度下进行等温处理 ,随等温温度的下降 ,共析转变产物有粒状化趋势 ;随等温转变时间的延长 ,共析转变产物粗化或由层片状粒化。铸态非平衡结晶组织可通过均匀化处理来消除
The microstructure of high Al-Zn-based alloy under the conditions of as-cast and heat treatment was studied systematically. The microstructure and microstructure of high Al-Zn-based alloy during the heat treatment were investigated. The mechanism of change was discussed. The results show that the isothermal treatment at different temperatures, with the isothermal temperature drop, the eutectoid transformation products have the tendency of granular; With the extension of the isothermal transformation time, the eutectoid transformation product coarsening or by the lamellar granulation. As-cast non-equilibrium crystalline structure can be eliminated by homogenization