Minimizing the Distortion of Steel Profiles by Controlled Cooling
Minimizing the Distortion of Steel Profiles by Controlled Cooling
复制标题
通过控制冷却最大限度地减少型材变形
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Bertram
中科院分区：
文献类型：
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作者：
R. Pietzsch;M. Brzoza;Y. Kaymak;E. Specht;A. Bertram
介绍了一种复杂的热力学模型，用于模拟钢材淬火过程中的温度场和应力场。材料行为是经典J2塑性理论的扩展，扩展了温度和相分数相关的屈服准则。考虑了机械能耗散、相变诱发塑性(TRIP)和相变热焓的耦合效应。该模型用于确定降低长型材变形的最佳冷却或淬火工艺。给出了模拟结果，以研究材料特性、边界条件、轮廓尺寸和几何形状的影响。在模拟中，考虑了C45钢和C80钢的L型材、T型和U型型材。结果表明，在型材的质量集中区采用较高的冷却速度，可以减小变形。
A complex thermomechanical model is introduced for the simulation of the transient fields of temperature and stresses during the quenching of steel products. The material behaviour is an extension of the classical J2‐plasticity theory with the extension of temperature and phase fraction dependent yield criteria. The coupling effects, i.e., dissipation of mechanical energy, transformation induced plasticity (TRIP), and phase transformation enthalpy, are considered. The model is used for the determination of the optimal cooling or quenching for reducing the distortion in the long steel profiles. The simulation results are presented in order to investigate the effects of material properties, boundary conditions, profile size and geometry. In the simulations, L‐, T‐ and U‐profiles made of steel C45 and steel C80 are considered. It is demonstrated that with a higher cooling rate in the mass lumped regions of the profiles, the distortion can be reduced.