闭开联合楔横轧微观组织温度的影响规律  

Effect of rolling temperature on microstructure of closed-open cross wedge rolling

作　　者：陈吉 束学道[1,2] 周子荣 CHEN Ji;HU Xue-dao;ZHOU Zi-rong(Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China;Zhejiang Provincial Key Laboratory of Part Rolling Technology, Ningbo 315211, China)

机构地区：[1]宁波大学机械工程与力学学院,浙江宁波315211 [2]浙江省零件轧制成形技术重点实验室,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2019年第3期55-60,共6页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(51475247);浙江省自然科学基金重点项目(LZ17E050001)

摘　　要：以42CrMo钢为研究材料,在Deform-3D软件中建立了闭开联合楔横轧热-力-微观组织耦合的有限元模型.通过单因素方法,分析了轧制温度对轧件平均晶粒尺寸的影响规律.结果表明,降低轧制温度,轧件越有利于结晶,平均晶粒尺寸越小;闭式轧制后晶粒随着温度的降低整体得到细化;开式阶段晶粒随着温度的升高,平均晶粒大小变化不明显.通过金相实验与模拟对比发现,两者曲线趋势一致,误差为15%,验证了有限元模拟的可靠性.In order to ensure the mechanical properties of the closed-open cross wedge rolling products, this paper uses 42CrMo as the research material, and establishes the finite element model of the combined heat-force-micro-structure coupling with Deform-3D software. The influence of rolling temperature on the average grain size of the rolled piece was analyzed by single factor method. It was obtained that the rolling piece was more favorable for crystallization and the average grain size was smaller as the rolling temperature decreased. After closed rolling, the grain size is getting refined as the temperature decreases. In the open rolling stage, the grain size does not change significantly with the increasing of temperature. Through the comparison of metallographic experiments and simulations, the trend of the two curves is consistent with an error of 15%, which verifies the reliability of the finite element simulation.

关 键 词：轧制温度 闭开联合 楔横轧 微观组织 

分 类 号：TG335.19[金属学及工艺—金属压力加工]