不同氮含量镀锡板连续退火后的组织与性能  

Microstructure and properties of tinplate with different nitrogen contents after continuous annealing

作　　者：兰昊天 宋乙峰 岳重祥 杨佳伟 Lan Haotian;Song Yifeng;Yue Chongxiang;Yang Jiawei(Institute of Research of Iron and Steel,Shagang,Jiangsu Province,Zhangjiagang Jiangsu 215625,China)

机构地区：[1]江苏省沙钢钢铁研究院有限公司,江苏张家港215625

出　　处：《金属热处理》2025年第1期140-146,共7页Heat Treatment of Metals

摘　　要：采用连续退火试验机对不同氮含量镀锡板进行不同温度(595~710℃)连续退火试验,对退火处理镀锡板的组织形貌、晶粒尺寸、硬度和拉伸性能进行分析。结果表明,氮含量的增加提升了镀锡板的再结晶温度,同时起到细化晶粒和抑制晶粒长大的作用。高氮含量镀锡板的硬度、强度均高于低含量镀锡板。析出氮化物主要为弥散的矩形TiN和AlN,析出物随着氮含量的提升而增多。当退火温度提升至690℃以上时,不同氮含量镀锡板中片层状珠光体沿晶界分布,取代沿轧制方向分布的粒状珠光体。根据试验结果,将工业生产高硬度镀锡板的连续退火温度控制在645~660℃范围,可减小硬度波动,提升制罐效率。Continuous annealing tests were conducted on tinplate with different nitrogen contents at different temperatures(595-710 ℃) using a continuous annealing testing machine.The microstructure,grain size,hardness,and tensile properties of the annealed tinplate were analyzed.The results show that the increase in nitrogen content raises the recrystallization temperature of the tinplate,while also refines grain size and inhabits grain growth.The hardness and strength of tinplate with higher nitrogen content are both higher than those with lower nitrogen content.The main nitrogen precipitates are dispersed rectangular TiN and AlN,which increase with the increase of nitrogen content.When the annealing temperature is raised to above 690 ℃,the lamellar pearlite in tinplate with different nitrogen contents is distributed along grain boundaries,replacing the granular pearlite distributed along the rolling direction.Based on the experimental results,controlling the continuous annealing temperature for the production of high-hardness tinplate in the industrial production within the range of 645-660 ℃ can reduce the hardness fluctuation and improve the canning efficiency.

关 键 词：镀锡板 氮含量 连续退火 析出物 组织 性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]