40Cr钢流变应力的分析及模拟

材料工程, 2004, (11): 41-49. doi: 10.3969/j.issn.1001-4381.2004.11.010

40Cr钢流变应力的分析及模拟

李雄 ^1, , 张鸿冰 ^2, , 阮雪榆 ^3, , 罗中华 ^4, , 张艳 ^5,

1.上海交通大学塑性成形系,上海,200030

2.上海应用技术学院材料工程系,上海,200235

3.上海交通大学塑性成形系,上海,200030

4.上海交通大学塑性成形系,上海,200030

5.北京科技大学新金属材料国家重点实验室,北京,100083

关键词：变形温度 , 流变应力 , 应变速率 , 峰值应力

Analysis and Modeling of Flow Stress of 40Cr Steel

研究了不同变形条件下流变应力的变化,发现流变应力与变形温度呈递减关系而与变形速率呈递增关系.在LudWik-Hollomon模型的基础上,提出了一个描述热/温变形的改进模型,该模型在对40Cr钢的模拟中表现出了较好的效果.硬化指数对变形温度不敏感,在低的应变速率下有一个不变值,而在高的应变速率下突然跃变.对峰值应力进行了预测,结果较为理想,预测值与实验值之间的平均相对误差和均方根分别为7.7%和17.59MPa.

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材料期刊网

40Cr钢流变应力的分析及模拟

Analysis and Modeling of Flow Stress of 40Cr Steel

参考文献