Modelling Solid-Gas Interactions During Sintering of PM Steels

机译：在PM钢烧结过程中模拟固-气相互作用

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In this study hydrogen reduction processes during sintering of PM steels are simulated by coupling mass, heat, and momentum phenomena on 2D simplified geometries. In practice, reduction of metallic surface oxides can be thermodynamically possible by adjusting the furnace atmosphere composition and its dew point. Nevertheless, the real reductive nature of the atmosphere inside the porous part is not easy to predict because water production can locally increase the H_2O/H_2 ratio and the oxygen partial pressure to non-reductive values. The results in this work will explore the influence of porosity, components diffusivities, and external gas velocities on the efficient renewal of the internal atmosphere on two prototypical geometries using effective transport properties at two different levels of coarse-graining.

机译：在这项研究中，通过在二维简化几何体上耦合质量，热量和动量现象来模拟PM钢烧结过程中的氢还原过程。实际上，可以通过调节炉内气氛成分及其露点在热力学上还原金属表面氧化物。然而，由于水的产生可以局部地将H_2O / H_2的比值和氧分压提高到非还原值，因此很难预测多孔部分内部气氛的真正还原性质。这项工作的结果将探索孔隙度，组分扩散率和外部气体速度对在两个原型几何结构上使用两种不同粗粒度水平下的有效传输特性的内部大气有效更新的影响。

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来源
《Powder metallurgy world congress amp; exhibition》|2010年|p.75-81|共7页
会议地点 Florence(IT);Florence(IT)
作者
P. Ortiz; W. Vargas;
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作者单位

CiPP-CIPEM. Department of Chemical Engineering. University of Los Andes, Carrera 1EN° 19A-40. Of 778. Edifico Mario Laserna. Bogota, Colombia;

rnGDPP. Department of Chemical Engineering. University of Los Andes, Carrera 1EN° 19A-40. Of 778. Edificio Mario Laserna. Bogota, Colombia;

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原文格式 PDF
正文语种 eng
中图分类粉末冶金（金属陶瓷工艺）;
关键词
sintering modelling; sintering atmosphere; porous media; effective transport properties; PM surface oxides; reduction kinetics;

机译：烧结模型；烧结气氛多孔介质有效的运输性能； PM表面氧化物；还原动力学;

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Modelling Solid-Gas Interactions During Sintering of PM Steels

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