摘要
实验研究了铸造319铝合金在余热热处理工艺下的微观组织、力学性能及旧砂再生处理。铸件余热热处理工艺即铸件在冷却至较高温度(400℃)时连同砂型和砂芯直接放入热处理炉内进行固溶处理。实验结果表明,采用铸造余热热处理工艺,仍然可以得到弥散分布在基体中的细小Si相增强颗粒,抗拉强度达到同一水平所需的固溶处理时间可以缩短至传统T6热处理的1/3至1/2,同时该工艺还将固溶处理、落砂及旧砂再生3工序有机结合,取得了节时节能的效果。
The effects of the remained heat treatment technique on the microstructure, mechanical properties of 319 Aluminum alloy and used sand reclamation were investigated. The heat treatment technique using casting residual heat is that the casting along with sand mould and sand core are conducted solid solution treatment in the heat furnace when the casting cools to 400℃. The results show that the similar microstructures can still be obtained by the new technique in which the fine Si particles can be dispersed in the matrix. After the solid solution treatment, tensile strength is increased by about 15%. Compared with T6 heat treatment technique, the time can be shorten about one third to a half. Besides, cycle time and energy consumption can be saved through integrating solidification solution treatment, sand-shakeout and sand reclamation into a process.
出处
《铸造技术》
EI
CAS
北大核心
2006年第4期360-363,共4页
Foundry Technology
基金
教育部留学归国人员科研启动基金资助项目(01204057)
关键词
319铸造铝合金
铸造余热热处理
树脂砂再生
319 Casting aluminum alloy
Casting remained heat treatment
Resin-bonded sand reclamation
