考虑多变量的钢质锻件硬度预测模型  

Prediction model of steel forging hardness considering multi-variables

作　　者：胡誉 姚源镠 朱淋淋 黄雄荣 胡成亮[1,2] 赵震[1,2] HU Yu;YAO Yuan-liu;ZHU Lin-lin;HUANG Xiong-rong;HU Cheng-liang;ZHAO Zhen(National Engineering Research Center of Die&Mold CAD,Shanghai Jiao Tong University,Shanghai 200030,China;Institute of Forming Technology and Equipment,Shanghai Jiao Tong University,Shanghai 200030,China;Shanghai Bearing Technology Research Institute,Shanghai 201801,China)

机构地区：[1]上海交通大学模具CAD国家工程研究中心,上海200030 [2]上海交通大学塑性成形技术与装备研究院,上海200030 [3]上海市轴承技术研究所,上海201801

出　　处：《塑性工程学报》2021年第11期131-135,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(5187050015)。

摘　　要：基于金属材料强度理论,推导了考虑等效应变、晶粒尺寸和位错密度影响的锻件硬度预测模型,获得了该模型相应的数学表达式。以调质处理后的20MnMoB材料为例,开展了带筋圆环试样的冷态镦锻变形实验,通过有限元模拟确定了试样变形后的等效应变分布,利用X射线衍射和电子背散射衍射技术分别测得变形后试样不同位置处的位错密度和晶粒尺寸,同时测量试样对应位置处的维氏硬度。以所得数据为基础,确定了模型中的关键参数。最后,利用确定的预测模型,对汽车轮毂锁紧套锻件的硬度进行了预测,获得了与实测一致的硬度分布状态,与实测值之间的误差不超过5%。Based on the strength theory of metal materials,the prediction model of forging hardness considering the influence of effective strain,grain size and dislocation density was derived,and the corresponding mathematical expression of the model was obtained.Taking the quenched and tempered 20 MnMoB material as example,the cold upsetting deformation experiment of the ring sample with ribs was carried out.The distribution of effective strain after deformation was determined by finite element simulation.The dislocation density and grain size at different positions of the deformed sample were measured by X-ray diffraction and electron backscatter diffraction technology,and the Vickers hardness at corresponding positions of the sample was measured.Based on the obtained data,the key parameters of the model were determined.Finally,the specific prediction model was used to predict the hardness of automobile hub locking sleeve forgings,and the hardness distribution consistent with the measured value was obtained.The error between the predicted value and the measured value is less than 5%.

关 键 词：硬度 预测模型 等效应变 晶粒尺寸 位错密度 

分 类 号：TG376.3[金属学及工艺—金属压力加工]