1405 粉体プロセスによる黒鉛添加完全鉛フリー快削性黄銅合金の特性(S09-1 粉末成形とその評価I,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Brass is widely used as industrial material because of its excellent characteristics such as high corrosion resistance, nonmagnetic, and good machinability. In particular, the machinable brass is obtained by adding lead. However, it is necessary to reduce the use of lead due to the hazardous to the environment and human. In this paper, the uniform distribution process of graphite particles into the brass alloy by powder metallurgy (P/M), and machinable lead-free P/M brass with graphite additives have been developed. The mixture powder of graphite and 6-4 brass alloy is employed as input raw materials, having a mean particle size of 5μm and 35μm, respectively. It was compacted at 1053K by Spark Plasma Sintering (SPS) to be used as billets for extrusion. The distribution of 1 wt% graphite particles in P/M extruded brass alloys was significantly uniform. The relation between graphitic addition and machinability was investigated.
2008-08-02