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| 921A舰船钢激光–MAG复合焊接过程数值模拟分析 |
| Numerical Simulation Analysis of Laser-MAG Hybrid Welding Process for 921A Ship Steel |
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| DOI：10.3969/j.issn.1674-6457.2023.03.016 |
| 中文关键词: 921A舰船钢 激光–MAG复合焊 数值模拟 热源模型 温度场 残余应力 |
| 英文关键词: 921A ship steel laser-MAG hybrid welding numerical simulation heat source model temperature field residual stress |
| 基金项目:北京市教育委员会科技计划重点项目(KZ202210017023) |
| Author Name | Affiliation | | SONG Kuang-da | School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China | | ZHU Jia-lei | School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China | | MIAO Chun-yu | School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China | | CAI Zhi-hai | National Engineering Research Center for Remanufacturing of Mechanical Products, Academy of Armored Force, Beijing 100072, China | | YAN Bing-yu | Angang Steel Company Limited, Liaoning Anshan 114000, China | | LI Song-zhao | School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China | | JIAO Xiang-dong | School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China |
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| 中文摘要: |
| 目的 对厚度为16 mm的921A舰船钢进行激光–MAG复合焊接，得到最佳工艺参数，从数值模拟的角度验证焊接工艺的可靠性。方法 利用SYSWELD+Visual–Environment软件对激光–MAG复合焊接过程进行数值模拟，选用3D高斯热源与双椭球热源相结合的复合热源模型对激光–MAG复合焊接过程进行仿真，绘制不同时刻及不同焊缝区域的时间–温度曲线，采用热弹塑性有限元法对应力变形场进行仿真计算。结果 双椭球热源模型与3D高斯热源模型相结合的复合热源模型能够获得较为理想、接近真实热源形貌的热源形态;焊缝区域的焊接热源在行进过程中温度稳定，模拟热源温度可达3 200 ℃，具有典型的焊接热循环曲线特征，且距离焊缝越远，升温速率和冷却速率越慢;焊接残余应力主要集中在焊缝处，约为440 MPa，且焊缝两端的结合部位具有较高的残余应力。结论 复合热源模型适用于16 mm厚的921A钢激光–MAG复合焊接数值模拟，焊后板材的残余应力低于材料的屈服强度，冷却后板材的变形程度较小，最大变形量为1.13 mm，表明激光–MAG复合焊接方法及工艺适用于16 mm厚921A钢的焊接。 |
| 英文摘要: |
| The work aims to perform laser-MAG hybrid welding on 921A ship steel with a thickness of 16 mm to obtain the optimal process parameters, and verify the reliability of the welding process from the perspective of numerical simulation. The laser-MAG hybrid welding process was simulated by SYSWELD + Visual-Environment software. A 3D Gaussian heat source combined with a double ellipsoidal heat source was used to simulate the laser-MAG hybrid welding process. The time-temperature curves at different times and in different weld zones were drawn. The thermal elastoplastic finite element method was used to simulate the stress deformation field. The results showed that the compound heat source model combined with the double ellipsoid heat source model and the 3D Gaussian heat source model can obtain the ideal heat source morphology close to the real heat source morphology. The temperature of the welding heat source in the weld area was stable in the process of moving, and the simulated heat source temperature can reach 3 200 ℃. It had typical characteristics of welding thermal cycle curve, and the farther away from the weld, the slower the heating rate and cooling rate. The welding residual stress was mainly concentrated in the weld, about 440 MPa, which was lower than the yield strength of the material, and the joint parts at both ends of the weld had higher residual stress. The composite heat source model is suitable for the numerical simulation of laser-MAG hybrid welding of 16 mm thick 921A steel. The residual stress of the sheet after welding was lower than the yield strength of the material, and the deformation degree of the sheet after cooling is small, with the maximum deformation of 1.13 mm, which indicates that the laser-MAG hybrid welding method and process are suitable for the welding of 16 mm thick 921A steel. |
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