摘要
采用手工钨极氩弧焊(TIG焊)在ZM5合金上制备镁合金单道、多道熔敷层,研究熔敷层的组织和力学性能。微观组织和物相分析表明,熔敷层由α-Mg相和β-Mg17Al12相组成,其晶粒较母材明显细化,热影响区晶粒较粗大;硬度分析表明单道熔敷层硬度达到80 HV0.05以上,而多道熔敷层的硬度约为77 HV0.05,均优于母材,热影响区的硬度与母材相当;摩擦磨损性能分析表明,熔敷层以磨粒磨损为主,平均摩擦因数为0.48,母材以粘着磨损为主,平均摩擦因数为0.42。试验验证了镁合金熔敷成形再制造的可行性,为ZM5镁合金多样性损伤的修复提供数据支撑。
Single and multi-pass depositing layers on ZM5 magnesium alloy were welded by manual tungsten arc inertgas （TIG） welding, and the microstructure and mechanical properties of the depositing layers were analyzed. The micro- structure and element analysis shows that the depositing layer consisting of a-Mg phases and β-Mg17 Al12 phases is finer than the base metal; however the grains of heat affected zone are coarse. The hardness analysis shows that the hardness of single depositing layer is beyond 80 HV0.05 , and the hardness of multi-pass depositing layer is about 77 HV0.05, both of them are superior to the suhstrate. However, the hardness of heat affected zone matches the substrate. Then wear friction analysis shows that depositing layer is mainly abrasive wear, and its average friction coefficient is 0.48, however the substrate wear is mainly adhered wear, therefore, its average friction coefficient is 0.42. These data can provide a support for surface and volume damage on ZM5 repairing, and also gives the feasibility of the depositing formation of magnesium alloy remanufacturing.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2015年第4期113-120,共8页
China Surface Engineering
基金
装备"十二五"预研基金(51327040301)
全军军事科研"十二五"计划(13QJJ003-041)
关键词
TIG焊
ZM5镁合金
熔敷层
成形再制造
力学性能
TIG welding
ZM5 magnesium alloy
depositing layer
formable remanufacturing
mechanical property
