摘要
运用LRP500自控式温度循环疲劳仪研究了30CrMnSiNi2A超高强度钢在不同循环次数、不同温度区间处理后的屈服强度、抗拉强度等参数的变化规律。通过实验测试、理论计算和有限元仿真相结合的方法,研究了温度循环处理对30CrMnSiNi2A钢力学性能的影响。结果表明:温度循环处理会降低30CrMnSiNi2A钢的屈服强度和抗拉强度,且温度循环区间越高、循环次数越多,材料力学性能下降越明显。基于实验数据,给出了考虑温度区间和循环次数下30CrMnSiNi2A钢的修正本构模型和有限元数值仿真结果。结果表明:保持循环次数为100次,温度区间在上限超过100℃后,温度每增加20℃,抗拉强度衰减0.65%,屈服强度衰减1.67%;保持温度区间为10~80℃,循环次数在600次以上时,循环次数每增加100次,抗拉强度衰减0.95%,屈服强度衰减1.94%。
The change rules of yield strength and tensile strength for 30CrMnSiNi2A ultra-high strength steel after treatment with different cycle times and different temperature ranges were studied by using LRP500 self-controlled temperature cycle fatigue tester,and the influences of temperature cycling treatment on the mechanical properties of 30CrMnSiNi2A steel were studied by experimental test,theoretical calculation and finite element simulation.The results show that the yield strength and tensile strength of 30CrMnSiNi2A steel decreases by temperature cyclic treatment.The higher the temperature cycle range is,the more the number of cycles is,the more obviously the mechanical properties of materials decrease.Based on the experimental data,the modified constitutive model and the finite element numerical simulation results of 30CrMnSiNi2A steel are given considering temperature range and cycle times.The results show that the tensile strength decays by 0.65%and the yield strength decays by 1.67%for every 20℃increase in temperature when the number of cycles keeps 100 and the upper limit of the temperature range exceeds 100℃,while the tensile strength decays by 0.95%and the yield strength decays by 1.94%for every increase in the number of cycles by 100 when the temperature range is 10-80℃and the number of cycles is more than 600.
作者
徐建新
崔勇志
刘兵飞
Xu Jianxin;Cui Yongzhi;Liu Bingfei(Technology Department,Civil Aviation University of China,Tianjin 300300,China;School of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;Science and Technology Innovation Research Institute,Civil Aviation University of China,Tianjin 300300,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第3期201-210,共10页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(11502284)
中科院重点部署项目(KFZD-SW-435)。
