首页 | 本学科首页   官方微博 | 高级检索  
     

挤压速度和电磁铸造锭坯对AZ31镁合金板材组织和性能影响
引用本文:张志强,乐启炽,崔建忠.挤压速度和电磁铸造锭坯对AZ31镁合金板材组织和性能影响[J].塑性工程学报,2009,16(2).
作者姓名:张志强  乐启炽  崔建忠
作者单位:东北大学,材料电磁过程研究教育部重点实验室,沈阳,110004
基金项目:国家支撑计划重点项目,高等学校科技创新工程重大项目,高等学校学科创新引智计划,国家重点基础研究发展规划(973计划) 
摘    要:文章研究挤压条件下挤压速度和电磁铸造锭坯对挤压态AZ31镁合金板材组织和性能的影响。研究结果发现,挤压速度比较低时,板材晶粒尺寸小,板材的表面质量比较好;随着挤压速度的降低,抗拉强度、屈服强度和延伸率都有一定的提高。由于镁合金是HCP的晶体结构,同时对挤压速度非常敏感,对变形均匀性影响比较大,因此造成挤压板材的内外晶粒大小不均。在电磁场的作用下,溶质在晶内的固溶度增大,同时晶粒大小也比常规铸造的细小,因此电磁铸造的锭坯经挤压机挤压后,挤压板材的晶粒尺寸比较细小,且强度和塑性都有所提高。

关 键 词:镁合金AZ31  挤压速度  微观组织  拉伸性能

Effects of extrusion speed and billets of electromagnetic casting on microstructure and mechanical properties of AZ31 magnesium alloy sheet
ZHANG Zhi-qiang,LE Qi-chi,CUI Jian-zhong.Effects of extrusion speed and billets of electromagnetic casting on microstructure and mechanical properties of AZ31 magnesium alloy sheet[J].Journal of Plasticity Engineering,2009,16(2).
Authors:ZHANG Zhi-qiang  LE Qi-chi  CUI Jian-zhong
Abstract:The effects of extrusion speed and ingots of electromagnetic casting on microstructure and mechanical properties of AZ31 magnesium alloy extrusions are investigated.When extrusion speed is lower,grain size of the extrusion decreases and surface quality in extrusion AZ31 magnesium alloy is very good.As a result,the tensile or yield strength and elongation of the extrusion decreases with the extrusion speed's increasing.Magnesium alloys are hexagonal closed-packed(HCP) and very susceptible to extrusion speed.And they have a significant effect on deformation uniformity,so gain sizes on the surface and in the center of the extruded AZ31 sheet are non-uniform.Electromagnetic field during DC casting can significantly increase the solute content in grains and can fine microstructures in ingots of AZ31 magnesium alloy,so the extruded sheet made of electromagnetic casting ingots has finer grain size,higher strength and higher elongation than the one made of DC casting ingots.
Keywords:magnesium alloy AZ31  extrusion speed  microstructure  mechanical properties
本文献已被 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号