激光-电弧两脉冲热源复合焊的等离子体瞬态复合耦合机理研究

项目名称： 激光-电弧两脉冲热源复合焊的等离子体瞬态复合耦合机理研究

项目编号： No.51305044

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 刘双宇

作者单位： 长春理工大学

项目金额： 25万元

中文摘要： 以多信息同步采集、物理归纳和数学演绎为手段，研究激光-MAG电弧两脉冲热源复合焊的激光诱导等离子体引燃MAG电弧的引弧特征、电弧物理特性、等离子体发射光谱的时间和空间分辨特征以及电弧能量的变化规律。由此揭示激光与MAG电弧两脉冲热源复合焊过程中激光等离子体与电弧等离子体的瞬态复合耦合机理和电弧能量增强机理。基于试验获得的熔池形状、红外热像图、焊缝形貌等图像信息，建立表征激光-MAG电弧两脉冲热源复合焊的焊缝截面尺寸的统计学模型，并预测焊缝成形。 本项目的研究成果对拓宽激光-电弧复合焊机理具有一定的学术价值，同时该项技术在高氮奥氏体不锈钢焊接上的应用，可满足国家对高氮奥氏体不锈钢焊接产品的高质量和大量需求，因此该技术具有重大的应用价值。

中文关键词： 高氮奥氏体不锈钢；激光-电弧复合焊接；等离子体；预测模型；温度场

英文摘要： The performance of laser induced plasma triggering arc discharge, arc physical properties, the time- and space-resolved optical emission spectra of plasma, and arc energy of both pulsed laser and arc hybrid welding were investigated by synchronous multi-information collection system, physical conclusion and mathematical deduction methods. Then, the machanism of the transient hybrid coupling between the laser induced plasma and arc plasma amidst the application of laser-arc hybrid weding, and arc energy enhancement characteristics were revealed. The statistical model of welded section size for both pulsed laser and arc hybrid welding was established, which was on the basis of the weld pool shape, the infrared thermography image information, and the weld pool size information. Research results of this project to expand the mechanism of laser-arc hybrid welding has a certain academic value. In addition, they can be applied to the high-nitrogen austenitic steels welding, leading to meet the national requirements for high quality welding. Therefore, this technology will provide significant application value in future.

英文关键词： High nitrogen austenitic stainless steel；Laser-arc hybrid welding；Plasma；Prediction mode；Temperature field