论七面体球磨介质的球磨效率及对合金组织性能的影响

摘要

This paper compares the different ball milling efficiencies and methods by using different milling mediums (Self-designed Heptahedron Milling and Ball-milling) during WC-10 %Co ’s wet grinding preparation process. The analysis of sintered alloy properties shows the effect of different ball milling mediums on alloy properties. The results indicate that:The efficiency of Heptahedron Milling Medium is higher than Ball-milling by bringing more powder activity and oxygen-adding tendency during the mixture storage process. It therefore causes relatively lower cobalt and magnetism contents. Adding 0.2 % paraffin can prevent powder oxidation. Heptahedron milling medium is suitable for the mixture preparation with raw materials ’ Fisher particle size larger than 5.0 μ m, while ball milling medium is suitable for raw materials ’ Fisher particle size 0.8~5.0 μ m.%采用湿磨法制备WC-10%Co混合料过程中分别使用自行设计的七面体球磨介质和传统球形球磨介质进行对比，研究其球磨效率和球磨方式，并通过烧结后合金的性能来分析不同的球磨介质对合金组织性能的影响.结果表明：与球形球磨介质相比七面体球磨介质能提高球磨效率；七面体球磨介质的球磨方式更容易给粉末带来活性，导致混合料放置过程中增氧趋势增大，使得钴磁偏低，增加0.2%石蜡便可阻止粉末的氧化；七面体球磨介质适合制备原材料费氏粒度大于5.0μm的混合料，球形球磨介质适合制备原材料费氏粒度为0.8~5.0μm的混合料.