Be、RE对AZ91D阻燃性、组织及力学性能的影响  

Effects of Be and RE on Ignition-proof Property,Microstructure and Mechanical Properties of AZ91D Magnesium Alloy

作　　者：韩富银[1] 王萍[1] 田林海[2] 梁伟[1] 王文先[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]太原理工大学表面工程研究所,山西太原030024

出　　处：《铸造技术》2011年第9期1261-1263,共3页Foundry Technology

基　　金：国家自然基金项目(50675148);山西省青年科技研究基金项目(20031039)

摘　　要：研究了Be的加入量对镁合金AZ91D起燃温度的影响,以及Be、RE对AZ91D显微组织与力学性能的影响。结果表明,含0.3%Be的AZ91D的起燃温度提高近300℃,Be的加入促进Mg17Al12相以离异共晶方式析出,降低了AZ91D的拉伸性能。加入1.0%RE可抑制Mg17Al12相的析出,从而强化了基体,Al4RE相可阻止裂纹的形成与扩展,增大试验合金的断裂抗力,使抗拉强度显著提高。固溶处理后拉伸性能得到了进一步提高。The effects of Be addition on ignition temperature and the Be and RE additions on microstructure and mechanical properties of AZ91D magnesium alloy were studied.Results show that the ignition temperature of AZ91D with 0.3% Be increases about 300 ℃.The addition of Be promotes the precipitation of Mg17Al12 in divorced eutectic form and decreases the tensile property of AZ91D alloy.The addition of 1.0%RE restrains the precipitation of Mg17Al12 and strengthens the matrix.Al4RE can inhibit the forming and extension of the cracks,increase the fracture resistance of the experimental alloy and improve the tensile strength observably.The tensile properties can be improved further after solution treatment.

关 键 词：BE RE 阻燃 显微组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]