摘要
低碳微合金钢在轧制过程中经常出现带状组织缺陷,对产品质量和使用性能都有着重要的影响。以某厂Q345热轧板坯为研究对象,通过对元素偏析,轧件热轧过程不同轧制道次、不同位置带状组织演变行为进行分析,结果表明,枝晶间溶质元素偏析是导致带状组织形成的本质原因。同时发现不同轧制道次和不同位置轧材,带状组织尺寸有着明显差异。不同轧制道次,相同位置的带状组织,压下率越大,带状组织越细小,压下率为50%时,中心带状组织宽度约为175μm;压下率为67%时,中心带状组织宽度约为75μm。相同轧制道次下,不同轧件位置的带状组织比较,可以发现厚度中心位置带状组织最为粗大,表面处最为细小。
Banded structure defects often appear in low carbon microalloyed steels during rolling process,which have a great impact on the product quality and service properties.In this study,Q345 hotrolled slab in a plant was selected as the research object,and the evolution of the banded structure in different rolling passes and positions during hot rolling was analyzed.The results show that the segregation of solute elements between dendrites is the essential reason for the formation of banded structure.At the same time,it is found that there are significant differences in the banded structure size of rolled products at different rolling passes and positions.For the banded structure at the same position in different rolling passes,the larger the reduction rate is,the smaller the banded structure is.When the reduction rate is 50%,the width of the central banded structure is about 175μm.When the reduction rate is67%,the width of the central banded tissue is about 75μm.Under the same rolling pass,the comparison of banded structure at different rolling positions can be made.It is found that the banded structure at half-thickness is the largest,compared to the smallest band observed at the surface.
作者
王博
李书恒
莫超群
张庆军
Wang Bo;Li Shuheng;Mo Chaoqun;Zhang Qingjun(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Hebei Province High Quality Steel Continuous Casting Engineering Technology Research Center,Tangshan 063210,Hebei,China)
出处
《钢铁钒钛》
CAS
北大核心
2023年第6期172-178,共7页
Iron Steel Vanadium Titanium
基金
国家自然科学基金-青年基金(52004093)
国家自然科学基金-区域创新发展联合基金重点项目(U21A20114)。
关键词
低碳微合金钢
热轧
带状组织
压下量
演变行为
low carbon microalloyed steel
hot rolling
banded structure
reduction
evolution behavior
作者简介
通讯作者:王博,1986年出生,男,辽宁铁岭人,副教授,研究方向:钢铁冶金、铸坏质量控制,E-mail:adherent@163.com。
