高强钢冷金属过渡电弧增材制造单焊道形貌研究  

Study on single weld bead profile of high strength steel in cold metal transfer wire arc additive manufacturing

作　　者：刘倩 李江波 刘嘉庚[4] 卢秉恒[2,3] LIU Qian;LI Jiang-bo;LIU Jia-geng;LU Bing-heng(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;School of Mechanical Engineering,Xi′an Jiaotong University,Xi′an 710049,China;National Innovation Institute of Additive Manufacturing,Xi′an 710117,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]西安交通大学机械工程学院,陕西西安710049 [3]国家增材制造创新中心,陕西西安710117 [4]桂林电子科技大学广西电子信息材料构效关系重点实验室,广西桂林541004

出　　处：《塑性工程学报》2025年第1期139-144,共6页Journal of Plasticity Engineering

基　　金：河北省自然科学基金资助项目(E2022209114,E2022209049);唐山市市级科技计划项目(22130217H);广西电子信息材料构效关系重点实验室开放基金资助项目(221004-K)。

摘　　要：通过试验系统性研究了冷金属过渡电弧增材制造时焊接速度与送丝速度对高强钢焊道几何轮廓的影响规律,利用光学显微镜表征不同工艺条件时焊道几何尺寸及截面轮廓特征。建立焊接速度、送丝速度与焊道轮廓间的关联关系,确定合适的工艺参数窗口。基于MATLAB软件平台编写包含图像处理、轮廓提取与曲线拟合等功能在内的成套程序,将焊道轮廓测量结果与抛物线、椭圆、圆与余弦函数等拟合模型进行比较。结果表明,相比焊接速度,送丝速度对焊道轮廓的影响更大。随着送丝速度的增加,焊道轮廓由窄高状变为扁平状。抛物线对于窄高状焊道拟合效果最佳,而当焊道截面呈扁平状时,椭圆模型与试验数据吻合程度最高,为后续电弧增材制造部件控形提供支持。The influence laws of welding speed and wire feeding speed on the geometric profile of high strength steel weld bead were systematically investigated in cold metal transfer wire arc additive manufacturing.The optical microscopy was used to characterize the geometric dimensions and cross-sectional profile of the weld beads under various process conditions.The relationship between welding speed,wire feeding speed and weld bead profile was established,and the optimal process parameters window was determined.A complete set of programs including image processing,contour extraction and curve fitting functions was developed using MATLAB software.The weld bead profile measurement results were compared with several fitting models such as parabola,ellipse,circle and cosine functions.The results show that wire feeding speed has a greater impact on weld bead profile compared with welding speed.With the increase of wire feeding speed,the weld bead profile changes from a narrow and high profile to a flat shape.The parabolic has the best fitting effect for the narrow and high profiles,while the elliptical model provides the best fit for test data,which provides support for controlling the shape of components in subsequent wire arc additive manufacturing process.

关 键 词：冷金属过渡 电弧增材制造 高强钢 焊道形貌 拟合函数 

分 类 号：TG44[金属学及工艺—焊接]