喷射沉积含Nd镁合金挤压坯的组织及性能不均匀性  

Inhomogeneity of Microstructures and Properties of Magnesium Alloy Extrusion Billets Contained Nd by Spray Deposition

作　　者：李振亮[1] 袁爱萍[1] 张婧[1] 吴朗[1] 陈伟[2] 翟景[2] 

机构地区：[1]内蒙古科技大学材料与冶金学院 [2]中国兵器科学研究院宁波分院

出　　处：《特种铸造及有色合金》2014年第11期1214-1217,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51364032)

摘　　要：以喷射沉积技术制备出Mg-Al-Zn系合金沉积坯,对其尺寸不均匀的挤压坯在高度、厚度方向上进行性能与微观组织的不均匀性研究。结果表明,挤压坯高度方向硬度值几乎没有变化,而壁厚方向硬度值则表现出"中间层小、内外层大"的规律,挤压过程中沉积坯塑性变形的不均匀是影响镁合金挤压坯组织及性能不均匀性的主要原因。The Mg-Al-Zn alloy billets were produced by spraying deposition method, and the extrusion billet exhibits asymmetry in the size. The inhomogeneity of microstructures and properties of extrusion magnesium alloy billets was investigated at height and thickness direction. The results indicate that the hardness value change of the extrusion billet at height direction can be ignored, while hardness at thick- ness direction presents the rule of smaller intermediate layer, larger inner and outer layers. Non-uniform plastic deformation of deposition billet in the process of extrusion plays a key role in affecting the inho- mogeneity of microstructures and performance of extrusion billet.

关 键 词：喷射沉积 镁合金 热挤压 不均匀性 组织性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TF123.14[金属学及工艺—金属材料]