Be对WE43镁合金高温氧化行为及阻燃性的影响
Effect of Be on Oxidation Behavior and Flame Retardancy of WE43 Mg-alloy at High-temperature
朱慧文 1郑黎 1张昊 2于宝义 1崔志博1
作者信息
- 1. 沈阳工业大学材料科学与工程学院 沈阳 110870
- 2. 大连冰山金属技术有限公司 大连 116600
- 折叠
摘要
采用电磁搅拌工艺制备添加0.04％(质量分数)Be的WE43(WE43-0.04Be)镁合金.对固溶处理后的镁合金在225℃下进行了不同时间(6、10、14h)的时效处理.结果表明,时效处理10h后合金拥有最佳的力学性能,抗拉强度为253 MPa,屈服强度达到209 MPa,延伸率为8.3％,可满足高速铁路结构件的力学性能要求.高温氧化实验结果表明,添加Be后合金在850℃的电阻炉中未燃.合金表面生成Mg与合金元素的混合氧化物层,从而抑制氧元素向合金内部扩散.
Abstract
The cast WE43 Mg-alloy with addition of 0.04％Be(WE43-0.04Be)was prepared by elec-tromagnetic stirring melting and casting process,and then subjected to solid solution treatment at 525℃ for 10 h plus aging treatment at 225℃ for 6,10 and 14 h,respectively.Afterwards,the microstructure,me-chanical property,oxidation behavior and flame-retardant property were assessed for the prepared alloys.The results showed that the WE43-0.04Be alloy aged for 10 h possessed the best comprehensive perfor-mance,namely its tensile strength,yield strength and elongation were 253 MPa,209 MPa and 8.3％re-spectively,which could meet the mechanical property requirements for high-speed railway structural parts.The WE43-0.04Be alloy will not bum in air when heated up to 850℃ in a furnace.A mixed oxide scale composed of compounds of Mg and alloying elements was generated on the surface of the alloy,thus inhibiting the inwards migration of aggressive species approching onto the interface oxide scale/WE43-0.04Be alloy.
关键词
WE43镁合金/高温氧化/氧化层/力学性能/显微组织Key words
WE43 Mg-alloy/high-temperature oxidation/oxide film/mechanical property/microstruc-ture引用本文复制引用
基金项目
中国国家铁路集团有限公司科技研究开发计划(P2020J024)
出版年
2024
NETL
NSTL
万方数据