添加碳纤维对连铸用铝碳耐火材料性能的影响  

Effect of Carbon Fiber on Properties of Alumina-carbon Refractories for Continuous Casting

作　　者：宋文文 朱国本 赵海峰 方昭庆 刘君 张宝荣 宋安康 SONG Wenwen;ZHU Guoben;ZHAO Haifeng;FANG Zhaoqing;LIU Jun;ZHANG Baorong;SONG Ankang(Qingdao Hiworld New Materials Co.,Ltd.,Qingdao 266000,Shandong,China)

机构地区：[1]青岛正望新材料股份有限公司,山东青岛266000

出　　处：《科技和产业》2025年第7期69-74,共6页Science Technology and Industry

摘　　要：为实现功能耐火制品的增强和增韧,在铝碳耐火材料中通过结合剂直接分散这种新的方式引入碳纤维作为增强体,研究添加不同含量的短切碳纤维对铝碳耐火材料性能的影响,对比分析试样在高温处理后的体积密度、显气孔率、常温抗折强度、耐压强度、抗热震性及高温抗折强度等指标的变化,分析不同热处理温度下试样的物相和形貌变化。结果表明,在1100℃热处理温度下,添加碳纤维试样的常温抗折强度、耐压强度、残余抗折强度及高温抗折强度与未添加碳纤维材料相比均得到有效提升,其中以碳纤维添加含量为0.1%时性能最优。含碳纤维试样经1500℃热处理后,经扫描电镜观察生成了发育良好的碳化硅晶须,并将基体与碳纤维间桥接起来。这表明适量的碳纤维加入量,在碳纤维和碳化硅晶须的双重增强作用下,可使试样获得优异的高温服役性能。In order to strengthen and toughen the functional refractory,carbon fibres were introduced as reinforcement in aluminium-carbon refractories in a new way using direct dispersion of the binding agent.The effects of different carbon fiber contents on the properties of aluminum-carbon refractories were studied.The changes of bulk density,apparent porosity,flexural strength at room temperature,compressive strength,thermal shock resistance and high-temperature flexural strength of the samples after high temperature treatment were compared and analyzed.Changes in the physical phase and morphology of the samples at different heat treatment temperatures were analyzed.The results show that after heat treatment at 1100℃,the flexural strength at room temperature,compressive strength,residual flexural strength and high temperature flexural strength of the samples with carbon fiber were effectively improved compared with those without carbon fiber.Among them,the performance is optimal when the carbon fiber content is 0.1%.Well-developed silicon carbide whiskers were obtained from the carbon fiber samples heat-treated at 1500℃and bridged carbon fibres with the matrix as observed by SEM.This suggests that suitable carbon fibre-doped can make the sample obtain excellent high-temperature service performance will Under the dual reinforcement of carbon fiber and silicon carbide whiskers.

关 键 词：碳纤维 铝碳耐火材料 高温抗折强度 抗热震性 复合增强 

分 类 号：TQ175[化学工程—硅酸盐工业]