| ER120S-G高强钢电弧增材制造的工艺优化 |
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| 引用本文： | 方学伟,蒋笑,王喆,武晓康,黄科.ER120S-G高强钢电弧增材制造的工艺优化[J].中国机械工程,2023,34(2):218-225. |
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| 作者姓名： | 方学伟 蒋笑 王喆 武晓康 黄科 |
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| 作者单位： | 1.西安交通大学机械制造系统工程国家重点实验室，西安，710049
2.海军工程大学电气工程学院，武汉，430033 |
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| 摘 要： | 针对ER120S-G高强钢电弧增材制造搭接间距的工艺优化问题，采用脉冲熔化极气体保护焊(GMAW-P)工艺，对5组单层焊道进行Canny边缘提取和高斯平滑滤波，并选用不同函数对单道形貌进行拟合。比较了常规搭接模型和优化的斜顶搭接模型，并计算出它们的最优搭接间距。研究结果表明，对于高强钢GMAW-P工艺，采用正弦函数拟合焊道边缘的效果最佳，并且采用优化的斜顶搭接模型得到的最优搭接间距为0.66倍的单道宽度。基于上述优化结果试验成形了多层多道块体样件，成形表面质量良好无缺陷，块体组织主要为针状铁素体、粒状贝氏体以及M-A组元等，抗拉强度呈现一定的各向异性。
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| 关 键 词： | 电弧增材制造 高强钢 表面形貌 力学性能 |
Forming Process Optimization of Wire and Arc Additive Manufactured High-strength Steel ER120S-G |
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| FANG Xuewei,JIANG Xiao,WANG Zhe,WU Xiaokang,HUANG Ke.Forming Process Optimization of Wire and Arc Additive Manufactured High-strength Steel ER120S-G[J].China Mechanical Engineering,2023,34(2):218-225. |
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| Authors: | FANG Xuewei JIANG Xiao WANG Zhe WU Xiaokang HUANG Ke |
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| Affiliation: | 1.State Key Laboratory for Manufacturing System Engineering，Xian Jiaotong University，Xian，710049
2.College of Electrical Engineering，Naval University of Engineering，Wuhan，430033 |
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| Abstract: | Aiming at the problems of lap spacing optimization for ER120S-G high-strength steel based on wire and arc additive manufacturing process， the pulsed gas metal arc welding（GMAW-P）processes were adopted to perform Canny edge extraction and Gaussian smoothing filtering for 5 sets of single-layer weld passes， and different functions were selected to fit the single-pass morphology. Conventional lap model and optimized slant-top lap model were compared， and the optimal lap spacing of them was calculated. The results show that， the sine function fits the weld contour best in the GMAW-P process of high-strength steel， and the optimal lap spacing from the optimized slant-top lap model is as 0.66 times of the weld width. Based on the above results， multi-layer multi-pass bulk samples were fabricated， and the surface quality is good and without obvious defects. The bulk mainly contains needle ferrite， granular bainite， and M-A elements. The tensile strength is anisotropic. |
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| Keywords: | wire and arc additive manufacturing high strength steel surface topography mechanics property |
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