微波场中高碳铬铁粉固相脱碳机理研究  

The Mechanism of Solid-Phase Decarburization of High-carbon Ferrochrome Powder in Microwave Field

作　　者：郝赳赳[1,2] 陈津[1] 韩培德[1] 李凯[1] 孙宏飞[1] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]山西工程职业技术学院,太原030009

出　　处：《太原理工大学学报》2014年第5期571-575,共5页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金委员会与宝钢集团有限公司联合资助项目(51174252)

摘　　要：结合背散射电子图像、X射线衍射分析,探讨微波加热场中高碳铬铁粉的脱碳机理。分析结果表明,微波加热时,CO2首先与高碳铬铁粉中的(Cr,Fe)7C3发生反应,然后再与其他铬铁碳化物反应;保温时间一定后,提高微波加热温度,高碳铬铁粉中(Cr0.7Fe0.3)7C3的比例减小,而(Cr0.7Fe0.3)23C6和铬铁素体相(CrFe)的比例增加;由于铬易被氧化,高碳铬铁固相脱碳时,物料发生了不同程度的氧化,且温度升高,氧化程度加剧。为进一步研究微波处理冶金粉料奠定基础。Solid-phase decarburization of high-carbon ferrochrome powders（HCFP）mixing a certain proportion of calcium carbonate powders（CCP）can be realized by microwave heating under a certain conditions.The mechanism of solid-phase decarburization is analyzed combined with backscattered electron image and（X-ray diffraction analysis）analysis.Experimental results show that,CO2 firstly reacts with（Cr,Fe）7C3and then with other ferrochrome carbides in microwave.The proportion of（Cr0.7Fe0.3）7C3decreases,while the proportion of（Cr0.7Fe0.3）23C6and（CrFe）increases,with the increase of temperature at the same holding time.Since Cr could be easily oxidized,different degrees of oxidation of decarburized materials occur along with the decarburization.Rising temperature results in enhanced oxidation.

关 键 词：微波加热 高碳铬铁粉 固相脱碳 脱碳机理 

分 类 号：TF19[冶金工程—冶金物理化学]