A508-3钢液对钢包用含碳耐火材料的侵蚀机理

耐火与石灰 ›› 2012, Vol. 37 ›› Issue (6): 15-19.

A508-3钢液对钢包用含碳耐火材料的侵蚀机理

薛燕鹏1，2）陈玉勇2）

1．北京航空材料研究院，北京 100095；2．哈尔滨工业大学材料科学与工程学院，哈尔滨 150001

出版日期:2012-12-31 发布日期:2012-12-31

Corrosion mechanism of A508 molten steel on carbon containing refractories for steel ladle

Xue Yanpeng1,2） Chen Yuyong2）

1．Beijing Institute of Aeronautical Materials，Beijing 100095，China；2．School of Materials Science and Engineering，Harbin Institute of Technology, Harbin 150001，China

Online:2012-12-31 Published:2012-12-31

摘要/Abstract

摘要：

采用感应炉浸渍实验法模拟钢包现场使用情况，借助X-射线衍射仪（XRD）、扫描电子显微镜（SEM）和热重分析设备（TGA）等分析手段，研究了含碳耐火材料的相组成、高温失重特性以及被钢液侵蚀后的显微组织。结果表明，在20～1 300℃加热阶段，MgO-C试样一直在减重，减重共计1.142 7mg，占试样总质量的16.93％，而Al2O3-MgO-C试样减重较少，减重共计0.441 4mg，占试样总质量的6.45％。加热温度在1 070～1 170℃，Al2O3-MgO-C试样少量增重。钢液对MgO-C和Al2O3-MgO-C耐火材料的侵蚀机理基本相同，均沿主相晶界侵入，晶界处有许多小孔洞，且晶界和晶内分布有许多小铁珠。

Abstract:

The induction furnace dipping experimental method is used to simulate the application condition on site． The phase composition，weight loss features under high temperatures and microstructure of carbon containing refractories after corroded by molten steel are investigated by means of analytical methods，such as XRD，SEM，TGA etc. The results show that in the stage of heating in the range from 20~1 300℃ the weight of MgO-C sample has been reduced all through, the total weight reduction is 1.142 7mg，occupying 16.93％ of its total mass，while the weight loss of Al2O3-MgO-C sample is less，the total weight loss is 0.441 4mg，occupying 6．45％ of its total mass. When heating temperatures range from 1 070~1 170℃, Al2O3-MgO-C sample has increased weight in small amount. The corrosion mechanisms of molten steel on MgO-C and Al2O3-MgO-C refractories are nearly same． Molten steel penetrates into the grain boundaries of major phases，generating many small holes at the boundaries and leaving intergranular and intragranular iron precipitation.

中图分类号:

TQ175.714

薛燕鹏;）陈玉勇）. A508-3钢液对钢包用含碳耐火材料的侵蚀机理[J]. 耐火与石灰, 2012, 37(6): 15-19.

Xue Yanpeng ） Chen Yuyong）. Corrosion mechanism of A508 molten steel on carbon containing refractories for steel ladle[J]. REFRACTORIES & LIME, 2012, 37(6): 15-19.

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