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30CrMnSi低合金高强钢以其优异的强度特点,广泛应用于工业部门的各个领域,但是高强钢的焊接结构易发生裂缝缺陷,特别是冷裂纹,因此对其进行控制研究十分迫切。本文基于电磁感应加热原理,通过在焊接热源后方同步跟踪电磁感应加热的方式合理地控制焊接接头的冷却过程。应用MSC.Marc软件进行电磁感应加热的二次开发和扩展。先进行了常规焊接过程模拟,然后进行焊接热源后方同步跟随电磁感应加热工艺过程模拟,对过程中的温度场进行了分析,通过分析解释了随焊电磁加热控制冷裂的机理。
Due to its excellent strength, 30CrMnSi low-alloy high-strength steel is widely used in various fields of the industrial sector. However, cracking defects, especially cold cracks, are likely to occur in the welded structure of high-strength steel. Therefore, research on its control is very urgent. Based on the principle of electromagnetic induction heating, this paper controls the cooling process of welded joints reasonably by synchronously tracking the electromagnetic induction heating behind the welding heat source. Application of MSC.Marc software for secondary development and expansion of electromagnetic induction heating. The simulation of the conventional welding process was carried out firstly, and then the welding heat source was synchronized to follow the simulation of the electromagnetic induction heating process. The temperature field in the process was analyzed. The mechanism of controlling the cold cracking with the welding electromagnetic heating was analyzed.