摘要
为了确定更适合于复杂断面型钢轧制成形工艺的韧性断裂准则,本文构建了包含韧性断裂准则的铰链型钢全轧程数值模型。通过分析轧件截面维氏硬度值与模拟计算的损伤因子之间的关系,确定了更适合在铰链型钢轧制成形工艺中应用的韧性断裂准则。研究结果表明,Brozzo韧性断裂准则在预测复杂断面型钢轧制过程中材料损伤演化方面表现最佳。此外,基于Brozzo准则计算的损伤因子,探究了不同轧制工艺参数组合对轧件最大损伤因子的影响规律。通过正交试验和多元回归分析,确定了影响轧件最大损伤因子显著的工艺参数依次为初轧温度、孔型偏转角和轧辊直径,而轧制速度的影响不显著。最终优化的工艺参数组合为:初轧温度1250℃,轧辊直径比1.15,孔型偏转角1.61°,轧辊转速148.9 r/min,此时轧件的最大损伤因子为7.92,相比于优化前减小了约20%。由此可见,选择适宜的工艺参数组合可以显著降低轧件的损伤因子,从而有效提高轧件质量。
To identify the more suitable toughness fracture criterion for the rolling forming process of complex cross-section steels,a comprehensive numerical model for hinge steel rolling that incorporates various toughness fracture criteria was established.By analyzing the relationship between Vickers hardness values of rolled sections and the damage factors calculated through simulation,the Brozzo toughness fracture criterion was determined to be the most effective for predicting material damage evolution in the rolling process of complex cross-section hinge steels.By utilizing the damage factors computed based on the Brozzo criterion,the influence of different combinations of rolling process parameters on the maximum damage factor of the rolled product was investigated.Through orthogonal experiments and multiple regression analysis,it was established that initial rolling temperature,die angle,and roll diameter significantly affect the maximum damage factor,while rolling speed does not have a significant impact.The optimized set of process parameters was identified as follows:initial rolling temperature of 1250℃,roll diameter ratio of 1.15,die angle of 1.61°,and roll speed of 148.9 r/min,resulting in a maximum damage factor of 7.92,which represents a 20%reduction compared with the pre-optimization value.These findings demonstrate that appropriate combinations of rolling process parameters can significantly reduce the damage factor of rolled products,thereby enhancing product quality.
作者
苏严
李立新
彭洲
SU Yan;LI Lixin;PENG Zhou(Key Laboratory for Ferrous Metallurgy and Resource Utilization of the Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Faculty of Materials Science,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《武汉科技大学学报》
北大核心
2025年第1期34-41,共8页
Journal of Wuhan University of Science and Technology
基金
武汉科技大学省部共建耐火材料与冶金国家重点实验室基金(2014QNO3).
关键词
铰链型钢
韧性断裂准则
轧制成形
工艺参数优化
正交试验
维氏硬度
hinge steel
toughness fracture criterion
rolling forming
process parameter optimization
orthogonal test
Vickers hardness
