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首页> 外文会议>Symposium on Cellular Metals and Polymers; 20041012-14; Furth(DE) >Production of Fe-Cr-C-base foam: theoretical considerations and practical fabrication
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Production of Fe-Cr-C-base foam: theoretical considerations and practical fabrication

机译：Fe-Cr-C基泡沫的生产：理论考虑和实际制造

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摘要

The present study aimed at the manufacturing of an Fe-Cr-C-base foam by nucleation of nitrogen pores into the alloy upon solidification. A composition presenting a suitable solubility gap between the austenite and the liquid phase was derived, based on calculated solubility curves. The solubility of nitrogen into liquid and austenite phases of Fe-base alloys was calculated by using an expression based on Wagner's interaction parameters. The equilibrium constant K and the interaction parameters of various alloying elements have been retrieved from previous experimental studies. The composition of the alloy was also tailored in order to generate precipitation of primary carbide particles, intended to control the growth of gas pores in the solidifying melt and prevent bubble coalescence. The feasibility of this process was proven by producing small amounts of Fe-Cr-C-base foam after dissolution of chromium nitride into the melt and subsequent solidification. The structure obtained and the role of the carbide particles were studied by microscopy.
机译：本研究旨在通过凝固时氮孔成核到合金中来制造Fe-Cr-C基泡沫。基于计算的溶解度曲线，得出在奥氏体和液相之间呈现合适的溶解度间隙的组成。通过使用基于瓦格纳相互作用参数的表达式来计算氮在铁基合金的液相和奥氏体相中的溶解度。平衡常数K和各种合金元素的相互作用参数已从先前的实验研究中获得。还对合金的成分进行了调整，以产生初级碳化物颗粒的沉淀，目的是控制凝固熔体中气孔的生长并防止气泡聚结。在氮化铬溶解到熔体中并随后固化后，通过生产少量的Fe-Cr-C基泡沫材料证明了该方法的可行性。通过显微镜研究获得的结构和碳化物颗粒的作用。

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