Transactions of Materials and Heat Treatment

Title：Influence of temperature cycle on mechanical properties of 30CrMnSiNi2A steel

Authors： Xu Jianxin1 Cui Yongzhi2 Liu Bingfei3

Unit： 1.Technology Department Civil Aviation University of China 2.School of Aeronautical Engineering Civil Aviation University of China 3.Science and Technology Innovation Research Institute Civil Aviation University of China

KeyWords： 30CrMnSiNi2A steel temperature cycle constitutive model yield strength tensile strength

ClassificationCode：TG142.33

year,vol(issue):pagenumber：2023,48(3):201-210

Abstract：

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.

Funds：

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)

作者简介：徐建新(1967-),男，博士，教授 E-mail：jxxu_cauc@163.com 通信作者：刘兵飞（1985-），男，博士，教授 E-mail：bingfeiliu2@126.com30CrMnSiNi2A

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