选区激光熔化316L不锈钢随形冷却通道电解抛光工艺优化  

Optimization of electrolytic polishing process for 316L stainless steel conformal cooling channel prepared by selective laser melting

作　　者：于亚洲 李志永[1] 李德佳 柴明霞 刘育辰 YU Yazhou;LI Zhiyong;LI Dejia;CHAI Mingxia;LIU Yuchen(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255049

出　　处：《电镀与涂饰》2024年第5期65-72,共8页Electroplating & Finishing

基　　金：山东省自然科学基金(ZR2020ME161)。

摘　　要：[目的]改善选区激光熔化(SLM)制备的316L不锈钢随形冷却通道内壁的表面品质。[方法]采用由NaCl、乙二醇及三乙醇胺组成的绿色环保电解液,通过阴阳极互换的方式对316L不锈钢随形冷却通道内壁进行电解抛光,通过正交试验及单因素实验探究阳极电流密度、温度、阴阳极置换次数及每次的电解时间对样件表面粗糙度及微观形貌的影响。[结果]电解抛光的较优工艺条件为:阳极电流密度0.55 A/cm^(2),温度40℃,阴阳极置换3次,单次电解10 min,总电解抛光时长60 min。在该条件下电解抛光后,冷却通道内壁光亮平整,表面粗糙度Sa为0.436μm。[结论]电解抛光能够显著提高以SLM工艺制备的随形冷却通道的表面品质。本文的研究结果可为模具工业注塑模型制造提供技术参考。[Introduction]The surface quality of the inner wall of conformal cooling channel made of 316L stainless steel by selective laser melting(SLM)needs to be improved.[Method]An environmentally friendly electrolyte composed of NaCl,ethylene glycol,and triethanolamine was used to electrolytically polish the inner wall of 316L stainless steel conformal cooling channel in a cathode/anode interchanging mode.The effects of anodic current density,temperature,cathode/anode interchange frequency,and electrolysis time for each interchange on the surface roughness and microscopic morphology of the electrolytically polished specimen were studied by orthogonal test and single-factor experiment.[Result]The electrolytic polishing process parameters were optimized as follows:anodic current density 0.55 A/cm^(2),temperature 40°C,cathode/anode interchange for 3 times,and electrolysis for 10 minutes per interchange and 60 minutes in total.After being electrolytically polished under the optimized conditions,the inner wall of cooling channel was bright and smooth with a surface roughness(Sa)of 0.436μm.[Conclusion]Electrolytic polishing can greatly improve the surface quality of conformal cooling channel prepared by SLM.The research results of this paper can provide technical reference for industrial injection mold manufacturing.

关 键 词：不锈钢 选区激光熔化 随形冷却通道 电解抛光 表面粗糙度 

分 类 号：TG175[金属学及工艺—金属表面处理]