锻压技术

Simufact Forming在模拟30CrNi2MoV钢锭加热及锻造过程的应用

英文标题：Application of Simufact Forming in heating and forging process simulation of 30CrNi2MoV steel ingot

作者：曾云1 2 李卫平1 2 刘升1 3 张志成1 2 胡瑞海1 2 周杨1 2

单位：1. 大冶特殊钢有限公司研究分院 2. 高品质特殊钢湖北省重点实验室 3. 武汉科技大学材料学部

分类号：TG316.5

出版年,卷(期):页码：2024,49(1):59-66

摘要：

运用Gleeble 3800热模拟机对30CrNi2MoV钢进行高温拉伸热模拟，结果显示，在锻造温度≥800 ℃时，断面收缩率≥93.8%，应力-应变曲线表现为塑性变形；锻造温度在800 ℃以下为脆性变形。运用Simufact Forming模拟9 t大钢锭的加热过程、锻造成形过程，通过将加热模型与锻造模型数据有机结合起来，精准控制终锻温度在800 ℃以上，确保终锻变形处于塑性变形区，降低了锻材形变过程的裂纹敏感性，有效地防止了锻造过程产生深裂纹，从而改善了钢材表面质量。并将模拟结果与实践生产进行对比验证，结果表明，实际终锻温度与模拟温度相差不超过10 ℃，表明模拟模型可以接受。此外，将9 t大钢锭的加热时间优化为21 h，避免了加热时间过长造成的能源浪费以及材料组织晶粒粗大影响力学性能。

Thermal simulation of high temperature tensile for 30CrNi2MoV steel was conducted by the Gleeble 3800 thermal simulator. The results show that when the forging temperature is ≥800 ℃, the percentage reduction of area is ≥93.8%, the stress-strain curve appears plastic deformation, and it is brittle deformation when the forging temperature is below 800 ℃. Then, the heating and forging processes of 9 t large steel ingot is simulated by Simufact Forming, and by combining the data of heating model and forging model, the final forging temperature is accurately controlled above 800 ℃ to ensure that the final forging deformation is in the plastic deformation zone and reduce the crack sensitivity during the deformation process of the forging material. Furthermore, the deep cracks is effectively prevented from occurring during the deformation process to improve the surface quality of steel, and the simulation results are compared and verified with the actual production. The results show that the difference between the actual final forging temperature and the simulated temperature is less than 10 ℃, which indicates that the simulation model is acceptable. The heating time of 9 t large steel ingot is optimized to 21 h to avoid excessive heating time, which causes energy waste and coarse grains of the material structure to affect the mechanical properties.

基金项目：

湖北省自然科学基金联合基金项目（2022CFD078）

作者简介：曾云(1988-)，男，学士，工程师 E-mail：zengyuncq@163.com

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