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为了找到淬火过程中零件产生不规则扭曲变形的原因,选择了H型截面零件为研究对象,建立了相应的有限元分析模型,利用自开发的淬火过程有限元模拟软件对温度、组织和应力/应变进行了耦合分析。通过有限元模拟,得到了温度变化、相变及相变塑性对残余应力及淬火变形的影响,给出了零件内部弹性区及塑性区的演变过程。分析结果表明:零件在淬火过程中经历“弹性-塑性-弹性-塑性-弹性”的演变过程;在淬火过程中,相变塑性导致零件发生不均匀、无规律的扭曲变形。
In order to find out the causes of the irregular distortion during the quenching process, the part of H-section was chosen as the research object, the corresponding finite element analysis model was established, and the temperature, structure and stress / Strain was analyzed by coupling. Through the finite element simulation, the influence of temperature change, phase transformation and phase change plastic on residual stress and quenching deformation are obtained. The evolution of elastic region and plastic region inside the part is given. The results show that the part undergoes the process of “elastic - plastic - elastic - plastic - elastic” during quenching. In the process of quenching, the phase change plastic causes uneven and irregular distortion of the part.