Mechanism and Influencing Factors of Shape Warpage of TA2/Q235B Composite Plates during Stress Relief Annealing

doi:10.3969/j.issn.1004-132X.2023.10.013

Abstract

Abstract: In order to explore the mechanism and influencing factors of shape warping during stress relief annealing of TA2/Q235B composite plates， a Gleeble thermal simulation experiment was carried out to obtain the true stress and strain of TA2 and Q235B materials under different working conditions. The JC constitutive model parameters of TA2 and Q235B were determined by numerical method， and the finite element simulation model of stress relief annealing was established by combining boundary conditions such as temperature and external load. The heat treatment experiments verified the accuracy of the model. The results show that a certain tensile load may improve the strain distribution， excessive tensile load results in local concentration of residual strain， and the composite ratio and the total thickness affect the stress distribution， which will affect the strain states.

Key words: titanium/steel composite plate, annealing, warping, thermal simulation experiment, constitutive equation

摘要： 为探究TA2/Q235B复合板去应力退火过程板形翘曲的机制及影响因素，进行Gleeble热模拟实验，获得了TA2、Q235B材料在不同工况下的真实应力与应变。采用数值方法确定了TA2和Q235B的JC本构模型参数，并结合温度、外载荷等边界条件建立了去应力退火的有限元仿真模型，采用热处理实验验证了所建立模型的准确性。结果表明一定的张力载荷可改善应变分布状态，但过大的张力载荷会导致残余应变局部集中，复合比与总厚度均会影响应力分布进而影响应变状态。

关键词: 钛/钢复合板, 退火, 翘曲, 热模拟实验, 本构方程

CLC Number:

TF11.31

WANG Rui, ZHAO Zhimin, HUANG Jing, LIU Xin, JI Xiangyun, SU Chunjian. Mechanism and Influencing Factors of Shape Warpage of TA2/Q235B Composite Plates during Stress Relief Annealing[J]. China Mechanical Engineering, 2023, 34(10): 1230-1240.

王瑞, 赵志敏, 黄晶, 刘鑫, 冀相云, 苏春建. TA2/Q235B复合板去应力退火过程板形翘曲的机制及影响因素[J]. 中国机械工程, 2023, 34(10): 1230-1240.

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