球墨铸铁喷吹球化工艺及优化实验研究  

Experimental research on spray-spheroidization process of ductile iron and its optimization

作　　者：未永斌 靳杰 刘俊锋[1,2,3] 耿国锋 WEI Yongbin;JIN Jie;LIU Junfeng;GENG Guofeng(Xinxing Hebei Engineering Technology Company Limited,Handan,Hebei 056107,China;High Strength and High Plasticity Ductile Iron Pipe Engineering Research Center(Preparation),Handan,Hebei 056107,China;Hebei Ductile Iron Pipe Manufacturing Innovation Center(Preparation),Handan,Hebei 056107,China;School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Key Laboratory of Material Near-Net Forming Technology,Shijiazhuang,Hebei 050018,China)

机构地区：[1]新兴河北工程技术有限公司,河北邯郸056107 [2]高强高塑性超长服役球墨铸铁管工程研究中心(筹),河北邯郸056107 [3]河北省球墨铸铁管制造业创新中心(筹),河北邯郸056107 [4]河北科技大学材料科学与工程学院,河北石家庄050018 [5]河北省材料近净成形技术重点实验室,河北石家庄050018

出　　处：《河北工业科技》2022年第4期261-267,共7页Hebei Journal of Industrial Science and Technology

基　　金：国家自然科学基金青年项目(51602316)。

摘　　要：为进一步优化喷吹球化工艺,提高镁的吸收率,对球墨铸铁管的应用效果以及铁液温度、球化深度与镁球化剂吸收率之间的关系进行了研究。结果表明球化后的残余硫含量能够稳定降低至0.01%(质量分数)以下,且残余镁含量大于0.05%(质量分数)不会发生球化衰退现象;球化时铁液温度越低、球化深度越大,铁液对镁的吸收率越大;当喷吹球化铁液温度为1460℃、球化深度为1.32 m时,可保证镁吸收率在50%以上。喷吹球化工艺兼顾了设备简单可靠、易维护,球化剂量调整灵活等特点,将其应用于快节奏、大批量的球墨铸铁管生产领域,降低了喷吹球化工艺成本,可为喷吹球化工艺在球墨铸铁行业的推广应用提供一定的参考。In order to further optimize the spray spheroidization process and improve the availability of Mg,the application effect of ductile iron pile and the relationship between molten iron temperature,spheroidization depth and the availability of Mg spheroidizing agent were studied.The results show that the residual S content after spheroidization can be steadily reduced to less than 0.01%(mass fraction),and spheroidization degeneration doesn′t occur when the residual Mg content is greater than 0.05%(mass fraction).During spheroidization,the lower the temperature of molten iron and the greater the spheroidization depth are,the greater the availability of Mg by molten iron is.When the molten iron temperature is 1460℃and spheroidization depth is 1.32 m,the Mg availability can be over 50%.The spray spheroidization process takes into account the characteristics of simple and reliable equipment,easy maintenance and flexible adjustment of spheroidization dose.It is applied to the production field of fast-paced and large-scale ductile iron pipes to reduce the cost of spray spheroidization process,which provides a certain reference for the popularization and application of spray spheroidization process in the ductile iron industry.

关 键 词：黑色金属及其合金 球墨铸铁 喷吹球化 镁处理 球墨铸铁管 

分 类 号：TG255[金属学及工艺—铸造]