摘要
针对AgMeO电触头材料显微组织不均匀的问题,提出了采用累积挤压大变形技术对该类材料进行显微组织均匀化的方法。在介绍大塑性变形技术的起源及累积挤压大变形技术原理的基础上,讨论了累积挤压大变形技术在AgMeO电触头材料组织均匀化方面的应用,结果表明,在现有加工设备的基础上,采用累积挤压大变形技术能够对AgMeO电触头材料的显微组织进行均匀化处理;AgMeO电触头材料制备过程中获得细小或纳米级第二相颗粒是大塑性变形过程中获得显微组织均匀化的保证;大塑性变形强度的选择需要根据AgMeO电触头材料的体系与特性确定。
Focus on the microstructure non-uniform of AgMeO electrical contact materials, the cumulative extrusion severe plastic deformation methodwas put forward to improve the homogeni- zation of the microstructure. Based on the introduction to the origin and theory of the cumulative extrusion severe plastic deformation method, its application to the microstrueture homogenization of AgMeO electrical contact materials was discussed. Results show that, on the basis of the existing processing equipment, the microstructure of AgMeO electrical contact materials can be homoge- nized by the cumulative extrusion severe plastic deformation method. The fine or nanometer second phase particles obtained in the preparation of AgMeO electrical contact materials are the guarantee of the microstructure homogenization. What＇s more, the intensity of severe plastic defor- mation is selected according to the system and character of AgMeO electrical contact materials.
出处
《电工材料》
CAS
2013年第1期20-23,共4页
Electrical Engineering Materials
基金
国家自然科学基金资助(50361003)
云南省省创新团队项目资助(2009CI003)
云南省自然科学基金资助(2008CD087)
关键词
显微组织均匀化
AgMeO电触头材料
大塑性变形
microstructure homogenization
AgMeO electrical contact materials
severe plastic deforma-tion
