[1]边娟鸽,王百川,王 超,等.doi: 10.3969/j.issn.1001-3849.2025.05.018 高速水基两相流对SLM CoCrMo燃油喷嘴微细复杂流道的光整研究[J].电镀与精饰,2025,(05):120-127.
　Bian Juange,Wang Baichuan,Wang Chao,et al.Study on the finishing of microfabricated complex flowpath in SLM CoCrMo fuel nozzles by high-speed water-based two-phase flow[J].Plating & Finishing,2025,(05):120-127.
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doi: 10.3969/j.issn.1001-3849.2025.05.018 高速水基两相流对SLM CoCrMo燃油喷嘴微细复杂流道的光整研究()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年05
页码:
120-127
栏目:
出版日期:
2025-05-31

文章信息/Info

Title:
Study on the finishing of microfabricated complex flowpath in SLM CoCrMo fuel nozzles by high-speed water-based two-phase flow
作者:
边娟鸽1; 王百川2; 王 超1; 张 超1; 米天健2; 郝 娟2
Mo燃油喷嘴微细复杂流道的光整研究边娟鸽1,王百川2,王 超1,张 超1,米天健2,郝 娟2(1. 西安航空职业技术学院 航空材料工程学院,陕西 西安 710089 ;2. 西安理工大学 材料科学与工程学院,陕西 西安 710048)
Author(s):
Bian Juange 1;  Wang Baichuan2;  Wang Chao1;  Zang Chao 1;  Mi Tianjian 2;  Hao Juan 2*
(1. School of Materials Science and Technology, Xi’an Aviation Vocational and Technical College, Xian 710089, China; 2. School of Materials Science and Technology, Xi’an University of Science and Technology, Xian 710048, China)
关键词:
高速水基磨粒两相流; 抛光压力; 表面粗糙度; 去除速率
Keywords:
high-speed water-based abrasive two-phase flow;  polishing pressure;  surface roughness;  removal rate
分类号:
TG175.3
文献标志码:
A
摘要:
随着SLM CoCrMo燃油喷嘴在航空航天等领域的应用需求不断提升，化学、电化学、磨粒流、磨料水射流等目前常见抛光方法对消除燃油喷嘴内流道表面缺陷均存在较大局限性，因此改善SLM CoCrMo燃油喷嘴微细复杂内流道的表面质量是目前亟待解决的关键问题之一。本文基于高速水基磨粒两相流抛光方法，选用碳化硅作为磨粒材料制备低黏水基抛光介质，在不同的抛光压力条件下对SLM 燃油喷嘴二维试样内流道进行光整处理。采用扫描电子显微镜、激光共聚焦扫描显微镜、流体动力特性检测平台、洛氏硬度计等检测手段对比分析抛光前后内流道表面微观形貌、表面粗糙度、尺寸精度、流量及洛氏硬度。结果表明，高速水基磨粒两相流可显著去除SLM 燃油喷嘴内流道表面的黏粉、台阶等缺陷，口径尺寸精度均在合理范围内。随着抛光压力由2 MPa增大至3.5 MPa，流道壁面由部分去除到基本完全去除，最终转变为明显子弹流状的过磨痕迹，流道表面粗糙度、洛氏硬度均呈现先减小后增大的变化趋势。当抛光压力为2.5 MPa时，抛光后的流道表面粗糙度达到最小值1.415 μm(原始9.090 μm)，流道口径扩大尺寸控制精度较好，去除速率由0.012 7 mm/min增大至0.014 3 mm/min，喷嘴流量由原始12.47 kg/h增加至21.47 kg/h，流道表面洛氏硬度由原始27.4 HRC提升至32.6 HRC，内流道表面光整效果达到最佳。
Abstract:
With the increasing demand for SLM CoCrMo fuel nozzles in aerospace and other fields, common polishing methods such as chemistry, electrochemistry, abrasive grain flow, and abrasive water jet have significant limitations in eliminating surface defects in the internal flowpath of fuel nozzles. Therefore, improving the surface quality of the fine and complex internal flowpath of SLM CoCrMo fuel nozzles is one of the key issues that urgently need to be addressed. In this paper, based on the high-speed water-based abrasive two-phase flow polishing method, silicon carbide is used as the abrasive material to prepare low-viscosity water-based polishing medium, and the two-dimensional specimen of SLM fuel nozzle internal flowpath is polished under different polishing pressure conditions, and scanning electron microscope, laser confocal scanning microscope, fluid dynamic characteristic detection platform, Rockwell hardness tester and other testing means are used to compare and analyze the surface micro-morphology, surface roughness, dimensional accuracy, flow rate and Rockwell hardness of the inner channel surface before and after polishing. The experimental results show that the two-phase flow of high-speed water-based abrasive particles can significantly remove the viscous powder, steps and other defects on the surface of the internal flowpath of the SLM fuel nozzle, and the dimensional accuracy of the caliber is within a reasonable range. As the polishing pressure increases from 2 MPa to 3.5 MPa, the wall surface of the flowpath changes from partial removal to almost complete removal, and finally transforms into an obvious bullet flow-like overgrinding traces. The surface roughness and Rockwell hardness of the flowpath show a trend of decreasing first and then increasing. When the polishing pressure is 2.5 MPa, the surface roughness of the polished flowpath reaches a minimum value of 1.415 μm (original 9.090 μm), the flowpath caliber expansion size control accuracy is better, the removal rate changes from 0.012 7 mm/min to 0.014 3 mm/min, the nozzle flow rate changes from the original 12.47 kg/h to 21.47 kg/h, the surface of the flowpath Rockwell hardness increases from 27.4 HRC to 32.6 HRC. The surface finishing effect of the inner channel reaches the best.

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更新日期/Last Update: 2025-05-19