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[14C-T1-05] New Segregation-Free Iron-Based Powder Mixture Effective for Reducing Ejection Force during Ejection Process after Compaction
Keywords:iron-based powder mixture, lubricant, ejection force, lubricity
A new segregation-free iron-based powder mixture with excellent lubricity has been developed. The most notable feature of this new powder mixture is superior lubricity compared with those containing conventional lubricants such as zinc stearate. In addition, clean sintered surfaces can be obtained because it does not contain zinc stearate. These features will contribute to improvement of product quality and yield rate of sintered parts. The mechanism of the excellent lubricity of this powder mixture was investigated by SEM/EDX analysis of green compact surfaces. The analysis indicated that the ejection force of compacts made of this powder mixture was reduced by the concentration of the lubricant between the compact and die wall surface during compaction process.