摘要
通过激光熔覆成形工艺制备了316L不锈钢燃料电池双极板流道,根据双极板流道结构要求,建立了熔覆道成形量化评分标准,通过正交试验研究了激光功率、扫描速度、铺粉厚度对熔覆道成形性能和耐腐蚀性能的影响。结果表明:铺粉厚度、激光功率、扫描速度对熔覆道成形影响的显著性依次减小;较低的激光功率、较高的扫描速度、较小的铺粉厚度以及较低的热输入,有利于获得成形更好的熔覆道;激光功率和扫描速度的增加均有利于提高熔覆道的耐点蚀性能;熔覆道成形效果越好,耐点蚀性能越好。
The 316L stainless steel bipolar plate for fuel cells was prepared by laser cladding forming process.According to the requirements of bipolar plate channel structure,the quantitative scoring standard of cladding channel was established.The effects of laser power,scanning speed and powder thickness on formability and corrosion resistance of the cladding channel were studied by orthogonal experiment.The results show that the effect of spreading powder thickness,laser power,and scanning speed on the formation of cladding channels decreased in order.The relatively low laser power,high scanning speed,small spreading thickness and low heat input were conducive to obtaining a cladding channel with better formability.Increasing laser power and scanning speed were both beneficial to improve the pitting corrosion resistance of the cladding channel.The better the formability of the cladding channel,the better the pitting corrosion resistance.
作者
肖罡
李时春
谢志益
黄冠迪
詹壮超
权思畅
XIAO Gang;LI Shichun;XIE Zhiyi;HUANG Guandi;ZHAN Zhuangchao;QUAN Sichang(Collaborative Innovation Center of Engineering Technology,Jiangxi University of Applied Science,Nanchang 330100,China;Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2020年第11期59-65,共7页
Materials For Mechanical Engineering
基金
中国博士后科学基金面上项目(2019M652755)
湖南省自然科学基金资助项目(2018JJ3178)
广西有色金属及特色材料加工重点实验室开放基金(2020GXYSOF16)
江西省教育厅科学研究项目(GJJ191277、GJJ191283)
湖南科技大学2019年大学生科研创新计划项目(SYZ2019030)。
关键词
燃料电池
双极板
激光熔覆
耐腐蚀性能
fuel cell
bipolar plate
laser cladding
corrosion resistance
