CAJ | 학술논문

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.
침대AgMeO전촉두재료현미조직불균균적문제,제출료채용루적제압대변형기술대해류재료진행현미조직균균화적방법.재개소대소성변형기술적기원급루적제압대변형기술원리적기출상,토론료루적제압대변형기술재AgMeO전촉두재료조직균균화방면적응용,결과표명,재현유가공설비적기출상,채용루적제압대변형기술능구대AgMeO전촉두재료적현미조직진행균균화처리;AgMeO전촉두재료제비과정중획득세소혹납미급제이상과립시대소성변형과정중획득현미조직균균화적보증;대소성변형강도적선택수요근거AgMeO전촉두재료적체계여특성학정.
Focus on the microstructure non-uniform of AgMeO electrical contact materials, the cumulative extrusion severe plastic deformation method was 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 microstructure 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.