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首页> 外文期刊>Transactions of JWRI >Mechanical Properties and Machinability of Extruded Cu-40%Zn Brass Alloys with Bismuth via Powder Metallurgy Process
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Mechanical Properties and Machinability of Extruded Cu-40%Zn Brass Alloys with Bismuth via Powder Metallurgy Process

机译：粉末冶金工艺挤压含铋的Cu-40％Zn黄铜合金的力学性能和切削性能

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摘要

In this paper the uniform distribution process of bismuth particles in Cu-40Zn brass alloy by powder metallurgy (P/M) and machinable lead-free P/M brass with bismuth are described. Cu-40Zn Brass with bismuth po vders produced by the rapid solidification processing were used as raw materials, having mean particle sizes of 150 μm. Three kinds of billets were prepared for the extrusion, namely green compact, sintered billets by using spark plasma sintering (SPS) and cast ingot. Bismuth dispersed in brass powder formed grains and dissolved into the powder surface by the heat treatment at the temperature over the melting point of bismuth. The behavior of bismuth existing in the primary particle boundary caused a decrease in the elongation of the extruded brass. Drill cutting ability was improved for the extruded material with the continuous machining chip. The shape of the machining chip was affected by the combination of brass matrix and the distribution of bismuth.
机译：本文描述了粉末冶金（P / M）和可加工的无铅P / M含铋黄铜中铋颗粒在Cu-40Zn黄铜合金中的均匀分布过程。通过快速凝固工艺生产的具有铋粉的Cu-40Zn黄铜用作原料，平均粒径为150μm。制备了三种坯料，即生坯，通过使用火花等离子体烧结（SPS）和铸锭的烧结坯料。铋分散在黄铜粉中形成晶粒，并通过在高于铋熔点的温度下进行热处理而溶解到粉末表面。存在于初级粒子边界中的铋的行为导致挤压黄铜的伸长率降低。通过连续加工切屑，可提高挤压材料的钻切能力。黄铜基体和铋的分布会影响加工芯片的形状。

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