高强海工钢厚板中氧化铝夹杂演变行为模拟  

Simulation of evolution behavior of alumina inclusions in thick plates of high-strength marine steel

作　　者：张泽飞 张兴红 刘奕江 陈振业 魏浩 吕知清[1] ZHANG Ze-fei;ZHANG Xing-hong;LIU Yi-jiang;CHEN Zhen-ye;WEI Hao;LÜZhi-qing(Key Laboratory of Advanced Forging&Stamping Technology and Science,Ministry of Education of China,Yanshan University,Qinhuangdao 066004,China;Technology Research Institute of HBIS,Shijiazhuang 050000,China)

机构地区：[1]燕山大学先进锻压成形技术与科学教育部重点实验室,河北秦皇岛066004 [2]河钢集团钢研总院,河北石家庄050000

出　　处：《塑性工程学报》2024年第7期202-211,共10页Journal of Plasticity Engineering

基　　金：河北省重点研发计划项目(20311003D);河北省创新能力提升计划项目(22567609H);上海大件热制造工程技术研究中心项目(18DZ2253400)。

摘　　要：为研究轧制工艺对高强海工钢中夹杂物破碎情况的影响规律,对含夹杂物厚板进行了有限元分析,并采用热压缩变形实验对夹杂物演变进行了物理模拟。结果表明:Al_(2)O_(3)夹杂物的破碎是由与基体相接触的表面逐渐传导至心部,并在中间位置发生断裂;夹杂物尺寸越大,越容易破碎,当尺寸达到一定值时,尺寸对夹杂物破碎行为的影响会越来越小;相较于相同压下率下的等温轧制,差温轧制厚度方向变形更为均匀,更容易达到心部位置处夹杂物的破碎条件。热变形结果显示,大尺寸(Φ80~Φ100μm)夹杂物发生严重破碎,小尺寸(≤Φ5μm)夹杂物未发生明显破碎,与有限元模拟结果具有一致性。In order to investigate the influence laws of rolling process on the crushing condition in inclusions of high-strength marine steel,the thick plates containing inclusions were analyzed by finite element,and physical simulation of inclusion evolution was conducted through thermal compression deformation experiments.The results show that the crushing of Al_(2)O_(3) inclusions is gradually transmitted from the surface in contact with the matrix to the center,and the fractures occur in the middle position.The larger the inclusion size is,the easier it is to crush.When the size reaches to a certain value,the influence of the size on the crushing behavior of the inclusion diminishes progressively.Compared with isothermal rolling under the same reduction rate,differential temperature rolling leads to more uniform deformation in the thickness direction,it is easier to achieve the crushing condition of inclusions at the center position.The thermal deformation results show that the inclusions with larger size(Φ80-Φ100μm)are seriously crushed,while the inclusion with smaller size(≤Φ5μm)is not obviously crushed,which is consistent with the finite element simulation result.

关 键 词：差温轧制 Al_(2)O_(3)夹杂物 有限元 子模型技术 内聚力模型 

分 类 号：TG335.5[金属学及工艺—金属压力加工]