随焊电磁感应加热对30CrMnSi焊接热循环影响的有限元分析
Finite element analysis on the 30CrMnSi weld thermal cycle influenced by electromagnetic induction heating
张勇,綦秀玲
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作者单位：辽宁工程技术大学材料科学与工程学院
中文关键字：焊接热循环；有限元方法；电磁感应加热；焊接温度场；30CrMnSi
英文关键字：weld thermal cycle, finite element analysis, electromagnetic induction heating, welding temperature field, 30CrMnSi
中文摘要：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，但是高强度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线圈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。先进行了常规的焊接过程模拟，然后采用焊接热源后跟随同步运动的热源来进行随焊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。
英文摘要：30CrMnSi has been widely utilized in various industrial fields for its excellent strength characteristics,. However, the weldability of the steel is not good. Such problem as cold welding crack is easily to be found in the joints. Based on the electromagnetic induction heating principle, a new technique with electromagnetic induction heating during welding has been proposed to control welding cold crack in welded joint of high-strength steel. Induction heating behind welding arc will reduce the cooling rate, that it The new technique could increase the production effeciency due to avoiding preheating and post weld heat treatment. The second development program of electromagnetic induction heating is simulating. Welding heat source is followed by the synchronous movement of the electromagnetic induction heating source to simulating the process of welding with induction heating. Analysis of the temperature field and thermal cycle curves of different nodes are discussed for the illustration of controlling cold crack.