摘要
通过Gleeble-3500试验机进行单道次热压缩试验,分析了变形温度、应变速率对23MnNiMoCr54合金钢热变形行为和微观组织演化规律的影响,建立了应变相关的热变形本构方程。在此基础上,绘制了热加工图,以确定最佳的加工范围。研究结果表明:23MnNiMoCr54合金钢热变形行为具有单峰型“动态再结晶”特征。热压缩时,变形温度越高和应变速率越低,23MnNiMoCr54合金钢的流动应力越小,且动态再结晶晶粒和变形晶粒有所长大。建立的热加工图表明,在较低变形温度和较高应变速率区间存在较大的流变不稳定性,容易发生流变失稳现象。23MnNiMoCr54合金钢热加工的最优工艺参数为变形温度为1150~1250℃,应变速率为0.01~0.1 s^(-1)。
The single pass hot compression experiment was carried out on Gleeble-3500 testing machine to analyze the influence of deformation temperature and strain rate on the hot deformation behavior and microstructure evolution laws of 23MnNiMoCr54 alloy steel.The strain-dependent thermal deformation constitutive equation was established.On this basis,the thermal processing map was drawn to determine the best processing range.The results indicate that the hot deformation behavior of 23MnNiMoCr54 alloy steel has unimodal“dynamic recrystallization”characteristics.The flow stress of 23MnNiMoCr54 alloy steel decreases with the increasing of deformation temperature and the decreasing of strain rate during hot compression.The dynamic recrystallized grains and deformed grains grow at higher deformation temperatures or lower strain rates.The established thermal working diagram shows that the larger rheological instability exists at lower deformation temperature and higher strain rate,and the rheological instability phenomenon is easily to occur.The optimal process parameters of 23MnNiMoCr54 alloy steel in hot processing are the deformation temperature of 1150-1250℃and the stain rate of 0.01-0.1 s^(-1).
作者
邢兵辉
黄亮
李建军
黄永宾
陈占民
王波
陈一畅
Xing Binghui;Huang Liang;Li Jianjun;Huang Yongbin;Chen Zhanmin;Wang Bo;Chen Yichang(State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Huangshi Mold Industrial Technology Research Institute,Huangshi 435000,China;Shandong Huayuan Rigging Co.,Ltd.,Rizhao 276811,China)
出处
《锻压技术》
北大核心
2025年第1期220-230,共11页
Forging & Stamping Technology
基金
国家重点研发计划项目(2022YFB3706901)
泰山产业创新领军人才项目
山东省科技型中小企业创新能力提升工程项目(2023TSGC0528)。
