锻压技术

30MnVS 非调质钢的本构模型与热加工图

英文标题：Constitutive model and hot processing map of 30MnVS nonquenched and tempered steel

作者：邓庆文1 胡洪斌1 于凯昌2 张宏涛1 王国文1 李航1 邓磊2 王新云2

单位：1. 湖北三环锻造有限公司 2. 华中科技大学材料成形与模具技术全国重点实验室

分类号：TG142.1

出版年,卷(期):页码：2025,50(7):248-254

摘要：

非调质钢凭借其良好的强度-韧性协同效应及全生命周期低碳排放优势，广泛应用于发动机关键承力部件。通过Gleeble热模拟实验，研究了30MnVS非调质钢在不同变形温度（900~1200 ℃）、应变速率（0.01~10 s-1）及变形量（10%~50%）下的热变形行为，建立了考虑应变补偿效应的Arrhenius本构方程。结合Prasad能量耗散准则，构建了不同应变条件下30MnVS非调质钢的热加工图，明确了动态再结晶主导区与失稳风险域的工艺边界。研究表明：在900~1150 ℃高温区间与低于1 s-1的低应变速率区间的材料动态再结晶显著，峰值应力随温度升高呈现衰减特征，降幅超过30%。当应变量大于0.2时，需规避温度高于1000 ℃且应变速率超过1 s-1的加工参数组合，避免流变失稳现象的发生。

Non-quenched and tempered steel is widely used in key load-bearing components of engines due to its excellent strength-toughness synergy and low carbon emissions advantages throughout its lifecycle. Therefore, the hot deformation behavior of 30MnVS non-quenched and tempered steel at different deformation temperatures (900-1200 ℃), strain rates (0.01-10 s-1) and deformation amounts (10%-30%) was investigated by the Gleeble thermal simulation experiments, and the Arrhenius constitutive equation considering the strain compensation effect was established. Then, combined with the Prasad energy dissipation criterion, the hot processing maps of 30MnVS non-quenched and tempered steel under different strain conditions were constructed, and the process boundary between dynamic recrystallization dominant zones and instability risk regions was clarified. The results indicate that at the high-temperature range of 900-1150 ℃ and the low strain rate range (<1 s-1), the mdynamic recrystallization of material is significant, and the peak stress shows a decay characteristic with the increasing of temperature, with a decrease of more than 30%. When the strain exceeds 0.2, it is necessary to avoid the combinations of processing parameters with a temperature higher than 1000 ℃ and a strain rate exceeding 1 s-1 to avoid the occurrence of rheological instability.

基金项目：

襄阳市科技计划项目（关键核心技术攻关专项）

作者简介：邓庆文（1975-），男，学士，高级工程师 E-mail：dqw096@foxmail.com 通信作者：于凯昌（1999-），男，博士研究生 E-mail：d202480507@hust.edu.cn

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