摘要
对陶瓷粒子向铝液或铝粉混合过程机制和均匀性进行了研究，发现搅融混合实用性强，均匀性差，而原位反应法和粉末混合法能获得均匀浆料或粉末体。自行设计和制造了液锻连挤和固液挤压板坯的实验装置，进行了不同类型混合粉挤压成形的研究，从而揭示了液锻连挤和固液挤压工艺的实质，使其获得的板坯具有较好的塑性。再轧制实验，获得了不同开轧温度和轧制压下量对组织性能影响数据。搅融混合硅线石颗粒与ＬＹ１２，经固液挤压或液态模锻加工连杆瓦和轴瓦，以替代锡青铜，并通过实际考核，具有明显降噪。
The mixing mechanism and uniformness of ceramic particulates and liquid state Al alloy or Al alloy powder has been investigated in this project.Experimental results show that the practicability of stirring mixing method is very strong,but the uniformness of mixing is not good.However,for in-situ reaction method and powder mixing method the uniform composite slurry and powder preform can be obtained.The experimental devices for the liquid forging and following extrusion and the semi-solid extrusion were independently designed,and the extrusion forming of various kinds of mixtures was investigated,which reveals the nature of the liquid forging and following extrusion and the semi-solid extrusion.Through the rolling experiments,the influencing regularity of the rolling starting temperature and the rolling reduction on the microstructure and the mechanical properties has been obtained.The sillimanite particles and 2024 Al were mixed by the stirring mixing method,and the connection bar and the half-bearing were produced by the method of the semi-solid extrusion or the liquid forging using sillimanite particles/2024 Al composites as the replacement of Sn-Cu alloy.Through practical application,the sillimanite particles/2024 Al composites possesses the satisfactory properties of denoising,damping and antifriction.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
1999年第9期1013-1015,共3页
China Mechanical Engineering
基金
国家自然科学基金
关键词
陶瓷粒子
铝基
复合材料
液锻连挤
轧制
ceramic particulate al based composite liquid forging and following extusion rolling
