ML45Mn2冷镦钢盘条的研究与开发  

Research and Development on ML45Mn2 Cold Heading Steel Wire Rod

作　　者：周国子 李为龙 ZHOU Guozi;LI Weilong(Techical Quality Department,Hunan Valin Xiangtan Iron and Steel Co Ltd,Xiangtan 411101)

机构地区：[1]湖南华菱湘潭钢铁有限公司技术质量部,湘潭411101

出　　处：《特殊钢》2022年第4期28-31,共4页Special Steel

摘　　要：120t转炉-LF-VD-350mm×430mm铸坯-150mm×150mm轧坯轧制流程生产的ML45Mn2钢Φ16mm和Φ18mm盘条采用的主要工艺为:碱度1.5-2.0精炼渣,52t中间包,电磁搅拌,轻重压下,开轧温度1010-1070℃,精轧温度820-850℃,卷曲温度780-820℃,冷速0.15-0.4℃/s等工艺。检验结果显示,ML45Mn2钢盘条热轧态平均抗拉强度797MPa,平均断面收缩率50.3%,1/4冷镦合格,金相组织为珠光体+铁素体,断面平均硬度值为92.5HRB,带状组织1.5-2.5级,满足技术要求。The main process technology of 120 t BOF-LF-VD-350 mm×430 mm cast bloom-150 mm×150 mm rolled billet flow sheet produced ML45Mn2 steelΦ16 mm andΦ18 mm wire rod is using refining slag with basicity of 1.5-2.0,52 ton tundish,electromagnetic stirring,light and heavy reducing,initial rolling at 1010-1070℃,finishing rolling at 820-850℃,coiling at 780-820℃,and cooling rate 0.15-0.4℃/s.The test results show that of ML45Mn2 steel hot rolled wire rod,the average tensile strength is 797 MPa,the average reduction of area is 50.3%,1/4 of the cold heading is qualified,the metallurgical structure is pearlite+ferrite,the average section hardness value is 92.5HRB,the band structure is 1.5-2.5 to meet the technical requirements.

关 键 词：冷镦钢 ML45Mn2 控轧控冷 

分 类 号：TG142[一般工业技术—材料科学与工程]