锻压技术

5Cr4Mo3VNb模具钢的锻造工艺参数优化

英文标题：Optimization on forging process parameters for 5Cr4Mo3VNb die steel

作者：朱钰1 李浩2 尚会超3

单位：1.郑州工业安全职业学院机电工程系河南郑州 451150 2. 郑州轻工业大学机电工程学院河南郑州 450002 3.中原工学院智能机电工程学院河南郑州 450007

分类号：TH164

出版年,卷(期):页码：2025,50(5):31-39

摘要：

为优化5Cr4Mo3VNb模具钢的锻造工艺参数，选用不同的始锻温度、终锻温度和锻造比进行了5Cr4Mo3VNb模具钢的锻造试验，并分析和测试了不同工艺参数下试样的显微组织和力学性能。结果表明，当始锻温度由1000 ℃提高至1080 ℃、终锻温度由800 ℃提高至900 ℃、锻造比由2增大至10时，5Cr4Mo3VNb模具钢试样的平均晶粒尺寸均先减小后增大，强度均先提高后下降。与1000 ℃始锻温度的试样相比，始锻温度为1060 ℃时试样的平均晶粒尺寸减小了40 μm、抗拉强度和屈服强度分别增大了114和107 MPa。与800 ℃终锻温度的试样相比，终锻温度为850 ℃时试样的平均晶粒尺寸减小了21 μm、抗拉强度和屈服强度分别增大了73和65 MPa。与锻造比为2的试样相比，锻造比为8时试样的平均晶粒尺寸减小了30 μm、抗拉强度和屈服强度分别增大了97和87 MPa。最终确定5Cr4Mo3VNb模具钢的最优始锻温度、终锻温度和锻造比分别为1060 ℃、850 ℃和8。

In order to optimize the forging process parameters of 5Cr4Mo3VNb die steel, the forging experiments of 5Cr4Mo3VNb die steel were conducted with different initial forging temperatures, final forging temperatures and forging ratios, and the microstructures and mechanical properties of the specimens under different process parameters were analyzed and tested. The results show that when the initial forging temperature increases from 1000 ℃ to 1080 ℃, the final forging temperature increases from 800 ℃ to 900 ℃, and the forging ratio increases from 2 to 10, the average grain size of 5Cr4Mo3VNb die steel specimens first decreases and then increases, and the strength first increases and then decreases. Compared with the specimen at the initial forging temperature of 1000 ℃, the average grain size of specimen is decreased by 40 μm, and the tensile strength and yield strength are increased by 114 and 107 MPa, respectively, when the initial forging temperature is 1060 ℃. Compared with the specimen at the final forging temperature of 800 ℃, the average grain size of specimen is decreased by 21 μm, while the tensile strength and yield strength are increased by 73 and 65 MPa, respectively, when the final forging temperature is 850 ℃. Compared with the specimen at the forging ratio of 2, the average grain size of specimen is decreased by 30 μm, while the tensile strength and yield strength are increased by 97 and 87 MPa, respectively, when the forging ratio is 8. Thus, the optimal initial forging temperature, final forging temperature and forging ratio of 5Cr4Mo3VNb die steel are 1060 ℃, 850 ℃ and 8, respectively.

基金项目：

河南省自然科学基金资助项目(202110210301)

作者简介：朱钰（1981-），女，学士，实验师，E-mail：Zhuyuzazy@163.com

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