工艺参数对激光选区熔化316L零件电解质等离子抛光的影响
Effects of process parameters on electrolysis and plasma polishing of selective laser melted 316L stainless steel
袁益民 1李辉 2谢鹏远 1王厚强 1胡丽 1葛晓宏1
作者信息
- 1. 厦门理工学院福建省功能材料及应用重点实验室,福建 厦门 361024
- 2. 厦门理工学院福建省功能材料及应用重点实验室,福建 厦门 361024;福建省绿色智能清洗技术与装备重点实验室,福建 厦门 361024
- 折叠
摘要
[目的]激光选区熔化技术(SLM)制备的316L不锈钢零件表面不易抛光.[方法]采用电解质等离子抛光技术对其进行抛光,研究了工艺参数对工件表面粗糙度(Ra)、微观形貌、元素含量、物相组成和耐蚀性的影响,并采用正交试验法进行工艺优化.[结果]各工艺参数对粗糙度的影响排序为:抛光电压>抛光时间>抛光液温度>下潜深度.最佳工艺参数为:抛光电压 320 V,抛光时间 300 s,抛光液温度 80℃,下潜深度 250 mm.抛光后的表面粗糙度可由 2.108 4 μm降低至0.212 7 μm,表面Cr元素含量由初始的13.92%增大到17.28%,在3.5%NaCl溶液中的腐蚀电位正移,腐蚀电流密度降低.[结论]电解质等离子抛光可有效改善SLM制备的316L零件的表面形貌,降低其表面粗糙度,提高其耐蚀性.
Abstract
[Introduction]The surface of 316L stainless steel part prepared by selective laser melting(SLM)is hard to be polished.[Method]Electrolysis and plasma polishing technology was used to polish it.Some factors affecting the surface roughness(Ra),micromorphology,elemental composition,phase structure,and corrosion resistance of the polished specimen were studied,and the process optimization was carried out by orthogonal test.[Result]The effects of the process parameters on surface roughness are in the following descending order:voltage>polishing time>electrolyte temperature>immersion depth.The process parameters were optimized as follows:voltage 320 V,polishing time 300 s,electrolyte temperature 80℃,and immersion depth 250 mm.The surface roughness of the specimen could be reduced from 2.108 4 μm to 0.212 7 μm after polishing,and the content of Cr on the surface could be increased from the initial 13.92%to 17.28%,and the corrosion potential was positively shifted in a 3.5%NaCl solution,and the corrosion current density was decreased.[Conclusion]Electrolysis and plasma polishing can effectively improve the surface quality of SLMed 316L stainless steel part,reduce its surface roughness,and improve its corrosion resistance.
关键词
奥氏体不锈钢/激光选取熔化/电解质等离子抛光/正交优化/表面粗糙度/耐蚀性Key words
austenitic stainless steel/selective laser melting/electrolysis and plasma polishing/orthogonal optimization/surface roughness/corrosion resistance引用本文复制引用
基金项目
福建省科技计划-对外合作项目(2020I0027)
福建省自然科学基金面上项目(2021J011212)
出版年
2024
NETL
NSTL
万方数据