微量铈对7136铝合金微观组织和性能的影响
发布时间：2019-02-28 18:05
【摘要】：在7136铝合金中添加微量Ce,通过金相分析、力学性能测定、扫描电镜等分析手段,研究了添加Ce后7136铝合金铸态组织的变化、成分分布和力学性能影响。结果表明:添加微量Ce后,由于溶质再分配,Ce元素富集在固液界面前沿,出现成分过冷,造成枝晶缩颈、熔断,结晶核心增多,促进了形核率,使晶粒细化;使合金元素Zn,Mg,Cu分布更加均匀,晶粒细小,尤其是Mg,作用明显;能够提高硬化速率、缩短时效时间,改变合金的断裂形式,提高合金的综合性能。
[Abstract]:By means of metallographic analysis, mechanical properties and scanning electron microscopy (SEM), the as-cast microstructure, composition distribution and mechanical properties of 7136 aluminum alloy added with 7136 aluminum alloy were studied by means of metallographic analysis, mechanical property measurement and scanning electron microscopy (SEM). The results show that due to the redistribution of solute, Ce element is enriched in the front of solid-liquid interface with the addition of micro-Ce, which results in the shrinkage of dendrite neck, the melting break and the increase of crystallization core, which promotes the nucleation rate and refines the grain size. The Zn,Mg,Cu distribution of the alloy element is more uniform and the grain size is fine, especially the effect of Mg, is obvious, which can improve the hardening rate, shorten the aging time, change the fracture form of the alloy and improve the comprehensive properties of the alloy.
【作者单位】： 烟台南山学院工学院材料系;山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心;中南大学材料科学与工程学院;
【基金】：山东省高等学校青年骨干教师国内访问学者项目经费项目 山东省科技发展计划项目(2014GGX102006)资助
【分类号】：TG146.21
，
本文编号：2432031
[Abstract]:By means of metallographic analysis, mechanical properties and scanning electron microscopy (SEM), the as-cast microstructure, composition distribution and mechanical properties of 7136 aluminum alloy added with 7136 aluminum alloy were studied by means of metallographic analysis, mechanical property measurement and scanning electron microscopy (SEM). The results show that due to the redistribution of solute, Ce element is enriched in the front of solid-liquid interface with the addition of micro-Ce, which results in the shrinkage of dendrite neck, the melting break and the increase of crystallization core, which promotes the nucleation rate and refines the grain size. The Zn,Mg,Cu distribution of the alloy element is more uniform and the grain size is fine, especially the effect of Mg, is obvious, which can improve the hardening rate, shorten the aging time, change the fracture form of the alloy and improve the comprehensive properties of the alloy.
【作者单位】： 烟台南山学院工学院材料系;山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心;中南大学材料科学与工程学院;
【基金】：山东省高等学校青年骨干教师国内访问学者项目经费项目 山东省科技发展计划项目(2014GGX102006)资助
【分类号】：TG146.21
，
本文编号：2432031
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2432031.html
