Prediction of particle size for water atomised metal powders: Parameter study
Prediction of particle size for water atomised metal powders: Parameter study
复制标题
DOI：
10.1179/1743290111y.0000000016
复制
发表时间：
2012-02
影响因子：
1.4
通讯作者：
Fredrik Persson;Anders Eliasson;Pär Jönsson
中科院分区：
文献类型：
--
作者：
Fredrik Persson;Anders Eliasson;Pär Jönsson
本工作旨在研究一些重要的雾化参数如何影响水雾化金属粉末的质量中值粒径d50。更具体地说，这些是水压，熔体流量，水射流角度，液态金属粘度和表面张力。对水雾化过程中d50的现有预测模型进行了综述。对所选模型进行了拟合，并与含碳量为0.5 - 4.4%的铁液雾化实验进行了比较。在参数研究中使用实验结果和模型计算，以研究不同参数如何影响d50。水压对d50的影响较大，粘度的影响居中，熔体流速和表面张力的影响较小。模型计算表明，射流角度对d50有很大的影响，这应该通过额外的研究来验证。Bergquist（B. Bergquist：粉末金属，1999，42，331-343）显示出与当前实验数据的最佳一致性。
This work aims to investigate how some significant atomising parameters influence the mass median particle size d50 of water atomised metal powders. More specifically, these were water pressure, melt flowrate, water jet angle, liquid metal viscosity and surface tension. Existing models for the prediction of d50 during water atomisation were reviewed. The selected models were fitted and compared with atomising experiments of liquid iron containing 0·5–4·4%C. Experimental results and model calculations were used in a parameter study to investigate how the different parameters influenced d50. The effect on d50 was large for the water pressure, medium for the viscosity and low for the melt flowrate and surface tension. Model calculations indicate that the jet angle has a large effect on d50, which should be verified by additional studies. The model proposed by Bergquist (B. Bergquist: Powder Metall., 1999, 42, 331–343) showed the best agreement with the current experimental data.