大棒材轧制对孔隙性缺陷压合的模拟方法研究  

Research on Pore Closure in Large Bar Rolling Process Based on Relative Density

作　　者：黄永建[1] 许志强[1] 刘才[1] 

机构地区：[1]燕山大学机械工程学院,秦皇岛066004

出　　处：《武汉理工大学学报》2010年第10期104-107,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50435010);河北省科学技术研究与发展计划项目(05202227D)

摘　　要：通过引入相对密度来间接表征轧件内部呈弥散分布的孔隙性缺陷,利用体积可压缩刚塑性有限元法模拟轧制过程中棒材芯部相对密度变化情况,根据模拟结果分析轧制工艺对轧件芯部孔隙性缺陷压合的影响情况,得到相应的变化规律。某钢厂将该研究结果应用于棒材轧制工艺参数制定,产品质量明显提高,验证了该方法的实用性和可靠性。The concept of relative density was introduced to represent the porosity defects in the core region of the bar.The change of the relative density has been simulated using compressible rigid-plastic finite element method.By the simulation results,the influence of processing parameters on the pore closure in the core of bar was analysed.The simulation results have been successfully used to guide the bar rolling process and improved the product quality noticeably.

关 键 词：相对密度 大棒材轧制 孔隙性缺陷 压下量分配 体积可压缩刚塑性有限元 

分 类 号：TG335[金属学及工艺—金属压力加工]