中高硫钢中硫化锰夹杂物控制技术  

Manganese sulfide inclusion control technology in medium and high sulfur steel

作　　者：谢啸宇 顾超 王敏 包燕平 罗雄志[2] 彭光健 XIE Xiao-yu;GU Chao;WANG Min;BAO Yan-ping;LUO Xiong-zhi;PENG Guang-jian(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Department of Technology and Quality,Hunan Valin Xiangtan Iron and Steel Co.,Ltd.,Xiangtan 411101,Hunan,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]湖南华菱湘潭钢铁有限公司技术质量部,湖南湘潭411101

出　　处：《钢铁》2021年第12期52-61,共10页Iron and Steel

基　　金：国家自然科学基金资助项目(51874021);中央高校基本科研业务费资助项目(FRF-TP-20-026A1);中国博士后科学基金资助项目(2020M680348)。

摘　　要：近年来,随着制造业的不断升级发展,对节能环保的要求越来越高,对于一些用于复杂零部件制造的钢种,为了降低在制造加工过程中的能耗,通常向钢中加入易切削元素(硫、碲、铅)来改善其切削加工性能。添加一定的硫是目前最常用的改善手段。硫在钢中主要以MnS形式存在,其形貌及分布控制水平对钢材力学性能有重要影响。对于中高硫钢,硫化锰属于塑性夹杂,在析出过程中易发生聚集长大,并且容易在轧制过程中沿拉轧方向变形,成为大尺寸长条状,这类大尺寸MnS会严重破坏材料的横向性能。为保证中高硫钢的钢材性能,需要对钢中MnS夹杂的形貌及分布进行控制,目标是避免大尺寸MnS的产生,尽可能得到细小、均匀分布的纺锤状MnS夹杂。MnS夹杂控制是一个系统的问题,必须联系整个工艺流程进行。总结了部分合金元素、工艺参数对MnS夹杂析出的影响规律,并综述了近年来在整个生产流程中的MnS夹杂控制实践,包括精炼过程的改性处理、复合析出控制,凝固过程控制和控轧控冷控制,并指出,对于如非调质易切削钢等中高硫钢中的MnS形貌及分布控制,如何将实验室研究成果落实于工业生产是广大研究者未来共同努力的方向。In recent years,with the continuous upgrading of manufacturing industry,the requirement of energy saving and environmental protection becomes higher and higher.For some steels used in the manufacture of complex parts,free-cutting elements(S,Te,Pb) are usually added to steel to improve its cutting performance in order to reduce energy consumption in the manufacturing process.Adding a certain amount of sulfur is the most commonly used improvement method at present.Sulfur mainly exists in the form of manganese sulfide in steel,and its morphology and distribution control level have important influence on the mechanical properties of steel.For medium and high sulphur steel,manganese sulfide is a plastic inclusion,which is easy to aggregate during precipitation and to deform along the rolling direction during rolling to form large-size strips.Such large-size manganese sulfide can seriously destroy the transverse properties of materials.To ensure the steel properties of medium and high sulphur steels,it is necessary to control the morphology and distribution of manganese sulphide inclusions in steel.The goal is to avoid the generation of large-size manganese sulphide and to obtain spindle-like manganese sulphide inclusions with fine and uniform distribution as possible.Manganese sulfide inclusion control is a systematic problem and must be carried out in conjunction with the entire process.The influence laws of some chemical compositions and process parameters on the inclusion precipitation of manganese sulfide were summarized.And the previous manganese sulfide inclusion control practices in the whole production process,including modification treatment of refining process,compound precipitation control,solidification process control and rolling and cooling control were reviewed.It is also pointed out that for the MnS control of non-quenched and tempered free cutting steel with medium and high sulfur content,how to implement the laboratory research results in industrial production is the direction of joint efforts for th

关 键 词：硫化锰 夹杂物 异质形核 非调质钢 控制技术 

分 类 号：TG142.1[一般工业技术—材料科学与工程]