论文部分内容阅读
采用Simufact有限元分析软件,对4000 mm×720 mm×285 mm尺寸的Al-Zn-Mg-Cu新型高强铝合金厚板淬火过程进行了模拟分析。结果表明,淬火过程中厚板表面和心部存在很大的温度梯度,同时各部分温降速率不断变化,淬火26 s时表面平均温降速率由10.43℃/s急降至小于0.01℃/s,而心部温降速率则是缓慢减小。厚板残余应力,淬火初期表现为外拉内压,淬火后期则为外压内拉。淬火后,厚板表面最大残余压应力分量约为-175 MPa,心部最大残余拉应力分量约为199 MPa。
Simian finite element analysis software was used to simulate the quenching process of 4000 mm × 720 mm × 285 mm Al-Zn-Mg-Cu high strength aluminum alloy plate. The results show that there is a large temperature gradient in the surface and heart of the slab during quenching, and the temperature drop rate of each part changes continuously. The average surface temperature drop rate rapidly decreases from 10.43 ℃ / s to less than 0.01 ℃ / s , While the rate of heart temperature drop is slowly reduced. Residual slab stress, the initial performance of external quenching internal pressure, quenching the external pressure is the internal pull. After quenching, the maximum residual compressive stress component of the slab surface is about -175 MPa, and the maximum residual tensile stress component of the heart is about 199 MPa.