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| 激光熔化沉积工艺参数对CoCrFeNiMn系高熵合金成形的影响 |
| Effect of Laser Melting Deposition Process Parameters on Forming of CoCrFeNiMn High-entropy Alloy |
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| DOI：10.3969/j.issn.1674-6457.2022.12.007 |
| 中文关键词: 高熵合金 激光熔化沉积技术 正交试验 拉伸性能 |
| 英文关键词: high-entropy alloy laser melting deposition technology orthogonal experiment tensile properties |
| 基金项目:先进焊接与连接国家重点实验室开放课题(AWJ?21M06) |
| Author Name | Affiliation | | DENG Xiao-xiao | School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China | | CHEN Xiao | School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China | | SUN Yong-xing | School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China | | WANG Yan-fang | School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China | | FENG Tao | School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao 266580, China |
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| 中文摘要: |
| 目的 用激光熔化沉积法制备CoCrFeNiMn系高熵合金，以得出最优成型方案。方法 通过正交试验方法，以沉积层的显微硬度为评价指标，分析激光功率、激光扫描速度和送粉速度对沉积层成型质量的影响程度，并得出激光增材制造的最佳工艺组合。结果 当激光功率超过2 000 W时，沉积层表面开始出现烧蚀现象，沉积层表面出现波纹，熔池宽度不均匀;当激光扫描速度为5、7 mm/s时，沉积层相对较均匀，表面平坦;当送粉速度为0.7 r/min时，送入金属粉末的量的增加使沉积层体积增大，宽度变均匀。结论 最佳工艺参数为:激光功率P=2 000 W、扫描速度Vg=7 mm/s、送粉速度Vf=0.7 r/min。多道沉积时，搭接率为50%其成型性最优，制备得到的材料抗拉强度为453.7 MPa，伸长率为27.5%。 |
| 英文摘要: |
| The work aims to prepare CoCrFeNiMn high-entropy alloy by laser melting deposition method, in order to obtain the optimal forming scheme. With the microhardness of the deposition layer as the evaluation index, the effect degree of laser power, laser scanning speed and powder feeding speed on the forming quality of the deposition layer were analyzed by orthogonal test, and the best process combination of laser additive manufacturing was found. When laser power is more than 2 000 W, the surface of the deposition layer began to appear ablation phenomenon, the surface of the deposition layer is corrugated, The width of the molten pool is nonuniform; when the laser scanning speed is 5 mm/s and 7 mm/s, the deposition layer is relatively uniform and the surface is flat; when the powder feeding speed is 0.7 r/min, the volume of the deposited layer increases and the width becomes uniform with the increase of the amount of metal powder. The optimum process parameters are as follows:laser power P=2 000 W, scanning speed Vg=7 mm/s, powder feeding speed Vf= 0.7 r/min. When the overlapping rate is 50%, the formability is the best. The tensile strength of the prepared material is 453.7 MPa and the elongation is 27.5%. |
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