碳对低碳搪瓷用钢密着性能的影响  

Effect of Carbon on Adherence of Low-Carbon Enameled Steel

作　　者：张丽琴 江海涛 刘景佳 吴剑胜[1] 孙武厅 Zhang Liqin;Jiang Haitao;Liu Jingjia;Wu Jiansheng;Sun Wuting(Hunan Valin Lianyuan Iron&Steel Co Ltd,Loudi 417009;Institute of Engineering Technology,University of Science and Technology Beijing,Beijing 100083)

机构地区：[1]湖南华菱涟源钢铁有限公司,娄底417009 [2]北京科技大学工程技术研究院,北京100083

出　　处：《特殊钢》2020年第2期50-53,共4页Special Steel

摘　　要：密着性能是衡量瓷釉和钢板之间结合强度的重要指标。基于采用不同C含量的低碳搪瓷用钢(/%:0.020~0.050C,0.004~0.039Si,0.12~0.24Mn,0.008~0.024P,0.002~0.007S,0.0026~0.051Al),研究分析了搪烧前后碳化物在低碳搪瓷用钢内存在形态、分布、形貌特征的规律及碳含量对瓷釉密着性能的影响规律。研究结果表明,C在低碳搪瓷用钢退火板中以游离渗碳体形式存在,而在搪烧后以珠光体和晶界渗碳体形式存在。珠光体和渗碳体不易溶解于瓷釉中,且渗碳体阻碍Fe与瓷釉发生化学反应,使钢板和瓷釉之间结合强度降低。碳含量控制在0.030%以下时,搪瓷钢密着性能较好,满足使用要求。Adherence is a key indicator to characterize bonding strength between porcelain glaze and steel sheet.With different carbon content in the low-carbon enameled steel(/%:0.020~0.050C,0.004~0.039Si,0.12~0.24Mn,0.008~0.024P,0.002~0.007S,0.0026~0.051Al),the shape,distribution and morphological characteristics of carbide before and after enameling and the effect of carbon content on porcelain glaze adherence are investigated.Result shows that carbon exists in annealed cold-rolled steel as free cementite before enameling,but as pearlite and grain boundary cementite after enameling.Pearlite and cementite are not easily to dissolve in porcelain glaze,in addition,the cementite inhibits the chemical reaction between Fe and porcelain glaze,which lower the bonding strength between sheet and porcelain glaze.As the carbon content is controlled ≤0.030%,the enamel steel adhesion is better to meet the requirements of use.

关 键 词：低碳钢 搪瓷 密着性 渗碳体 

分 类 号：TG142.1[一般工业技术—材料科学与工程]