In Situ Monitoring and Dissolution Limit of Carbon Dissolution in Hot Metal,Steel Research International

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In Situ Monitoring and Dissolution Limit of Carbon Dissolution in Hot Metal
Steel Research International ( IF 1.9 ) Pub Date : 2021-05-15 , DOI: 10.1002/srin.202100111
Minmin Sun ₁ , Keliang Pang ₂ , Jianliang Zhang _{1,

3} , Kejiang Li ₁ , Hongtao Li ₁

Affiliation

Isothermal and nonisothermal experiments are conducted to characterize the dissolution processes of carbonaceous materials into iron. The nonisothermal process shows that the dissolution of graphite into iron is mainly divided into solid-phase and liquid-phase dissolution. The carbon dissolution into solid iron accelerates the phase transition and melting of iron. Isothermal experiments indicate that the dissolution process is divided into three stages: rapid carburizing (0−60 min), slow carburizing (60−180 min), and dissolution equilibrium (180−360 min). In addition, the dissolution behavior of different carbon materials is compared and analyzed. The disorder of carbon matrix and the existence of ash are important factors that influence the carbon dissolution kinetics and dissolution limit. Pores provide a location for ash migration under high temperature so that it does not aggregate at the iron−carbon interface. In addition, the irregular interconnected pores also provide a larger reaction contact area for carburizing.

中文翻译：

铁水中碳溶解的原位监测和溶解极限

进行等温和非等温实验以表征含碳材料溶解成铁的过程。非等温过程表明，石墨对铁的溶解主要分为固相溶解和液相溶解。碳溶解到固体铁中加速了铁的相变和熔化。等温实验表明溶解过程分为三个阶段：快速渗碳（0-60 min）、缓慢渗碳（60-180 min）和溶解平衡（180-360 min）。此外，对不同碳材料的溶解行为进行了比较和分析。碳基体的无序和灰分的存在是影响碳溶解动力学和溶解极限的重要因素。孔隙为高温下灰分迁移提供了一个位置，因此它不会在铁碳界面聚集。此外，不规则相互连通的气孔也为渗碳提供了更大的反应接触面积。

更新日期：2021-05-15

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