陈秀玉,林郁茹,李科林,陈俊英,蒋清山,方芳,许志龙,黄国钦.激光冲击强化9Cr18钢及协同制备表面微坑研究[J].表面技术,2024,53(11):193-204.
CHEN Xiuyu,LIN Yuru,LI Kelin,CHEN Junying,JIANG Qingshan,FANG Fang,XU Zhilong,HUANG Guoqin.Laser Shock Processing of 9Cr18 Steel and Synergistic Preparation of Surface Micro-pits[J].Surface Technology,2024,53(11):193-204 |
| 激光冲击强化9Cr18钢及协同制备表面微坑研究 |
| Laser Shock Processing of 9Cr18 Steel and Synergistic Preparation of Surface Micro-pits |
| 投稿时间：2023-06-02 修订日期：2023-08-22 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.11.017 |
| 中文关键词: 9Cr18钢 激光诱导 表面织构 表面形貌 激光参数 |
| 英文关键词:9Cr18 steel laser induction surface textures surface morphology laser parameters |
| 基金项目:福建省自然科技基金青年项目(2021J05168);福建省自然科学基金面上项目(2021J01855);福建省重大专项(2022HZ024009);福建省科技厅项目(2021HZ024006) |
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| Author | Institution |
| CHEN Xiuyu | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| LIN Yuru | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| LI Kelin | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| CHEN Junying | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| JIANG Qingshan | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| FANG Fang | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| XU Zhilong | College of Marine Equipment and Mechanical Engineering, Jimei University, Fujian Xiamen 361000, China |
| HUANG Guoqin | Huaqiao University, Fujian Xiamen 361000, China |
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| 中文摘要: |
| 目的 探索9Cr18钢经激光冲击强化后，二次激光冲击制备表面微坑的可行性和相关工艺。方法 利用不同工艺参数对9Cr18钢试样进行单点冲击，使用激光共聚焦对单点冲击诱导的微坑进行轮廓形貌检测，使用显微硬度仪测量微坑区域的硬度;通过激光冲击对9Cr18钢进行全覆盖表面强化，并进行二次激光冲击，以制备表面微坑。结果 对于单点冲击，表面凹坑深度随着激光冲击能量的增大而增大，并非呈线性增大。当冲击能量为12 J时，凹坑深度达到38.39 µm。对于同能量单点双次冲击，其凹坑深度比单点冲击大。当冲击能量为12 J时，双次冲击深度最大达到49.05 µm。在能量梯度叠加冲击时，以6 J为第1次冲击能量，将第2次冲击能量提高到12 J，此时凹坑深度达到58.61 µm。对于不同脉宽冲击，在脉宽为26 ns时，不同能量冲击的凹坑深度均达到最深。经激光冲击强化后，采用不同能量进行二次冲击，在能量为12 J时凹坑深度为19.79 µm。采用不同脉宽进行二次冲击，在脉宽为22、26 ns时，凹坑深度为13.61 µm。结论 表面微坑的深度随着能量、脉冲宽度和冲击次数的增加而增加;表面微坑的硬度随着能量和次数的增加而增大，硬度随着脉宽的增加呈先减小后增大的趋势;采用激光冲击工艺协同处理，可以强化9Cr18钢表面，并制备出一定深度的微坑，可为激光冲击对9Cr18钢的强化及表面织构化提供理论指导和工艺基础。 |
| 英文摘要: |
| The work aims to explore the feasibility and related processes of preparing surface micro-pits by secondary laser impact after laser shock processing of 9Cr18 steel. The single-point impact of 9Cr18 steel samples with different process parameters was carried out, the Laser Confocal was used to measure the two-dimensional morphology profile of micro-pits texture by single-point laser shock induction and the hardness of micro-pit induced by single-point impact was measured by microhardness tester. The full coverage surface of 9Cr18 steel was impacted by laser shock processing to obtain the surface strengthening layer, and the micro-pit texture was treated by secondary laser impact induction to form the surface texture. For the micro-pit prepared by single-point impact, the depth of the surface micro-pits increased with the increase of laser impact energy, but it was not linear. When the impact energy was 12 J, the depth of the micro-pits reached 38.39 µm. When the single-point double impact was carried out under the same energy, the depth of the surface micro-pits slightly increased compared with the single-point single impact under the same energy. When the impact energy was 12 J, the maximum depth of the micro-pits obtained by the double impact was 49.05 µm. When the superimposed impact of different energy gradients was carried out and 6 J was used as the first impact energy and the second impact energy gradually increased to 12 J, the surface micro-pit depth after the superimposed gradient energy reached 58.61 µm. For the impact of different energy and different pulse width, when the pulse width was 26 ns, the micro-pit depth under the impact of different energy reached the deepest and gradually increased to a stable depth with the increase of pulse width. After laser shock processing, different energies were used for secondary impact, and the depth of the micro-pits reached 19.79 µm when the secondary impact energy was 12 J. After laser shock processing, the depth of the micro-pits reached 13.61 µm when the secondary impact pulse width was 22 ns and 26 ns. It can be concluded that the depth of surface micro-pits increases to varying degrees with the increase of energy, pulse width, and impact times, and then reaches a stable state at a certain parameter. The hardness of surface micro-pit under single impact with different parameters increases significantly with the increase of energy and impact times, and decreases firstly and then increases with the increase of pulse width. The preparation of micro-pits on the strengthening layer is realized, the surface is strengthened by laser impact to improve the surface hardness to obtain a good surface strengthening layer, and the secondary single-point impact on the surface is used to prepare micro-pits, which can achieve the ideal hardness and micro-pit depth. Through step-by-step experimental research, the reasonable synergistic treatment of the laser shock processing can achieve the strengthening of 9Cr18 steel surface and the preparation of a certain depth of micro-pits, providing theoretical guidance and process basis for the strengthening and textured surface of 9Cr18 steel by laser impact. |
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