重型机械Issue(3)：31-37,42,8.
激光功率对液压油缸内壁铜合金熔覆层组织及性能的影响
Effect of laser power on microstructure and properties of copper alloy cladding layer on inner wall of hydraulic cylinder
摘要
Abstract
The inner wall of hydraulic cylinders is prone to wear and corrosion damage in high-friction and corrosive underground environments.In this study,a copper alloy coating was fabricated on 27SiMn steel via high-speed laser cladding.By combining experiments with simulations,the molten pool temperature distribution,coating macroscopic morphology,microstructure,and wear and corrosion resistance under different laser powers were systematically analyzed.The results indicate that as the laser power increases,both the maximum temperature and the high-temperature region of the molten pool continuously expand.The coating microstructure mainly consists of dendrites and acicular structures,and the grain size exhibits a trend of first decreasing and then increasing with rising laser power.At the higher power of 2 500 W,a thick layer of coarse dendrites appears at the top of the coating.The microhardness of the coating first increases and then decreases with increasing laser power,reaching the highest value with good uniformity at 2 300 W.Based on the comprehensive friction/wear results,along with electrochemical corrosion analysis,the optimal process parameters are determined as follows:laser power of 2 300 W,scanning speed of 28 mm/s,powder feed rate of 24 g/min,and overlap ratio of 70%.This study reveals the influence of laser power on the microstructure and comprehensive properties of laser-cladded copper alloy coatings,providing technical guidance for the high-quality repair of hydraulic cylinder inner walls via laser cladding.关键词
激光功率/液压油缸/温度场/耐磨性/耐腐蚀性Key words
laser power/hydraulic cylinder/temperature field/wear resistance/corrosion resistance分类
机械制造引用本文复制引用
陈忠宇,刘从朋,吕红伟,白峭峰,仝云奇,王建梅..激光功率对液压油缸内壁铜合金熔覆层组织及性能的影响[J].重型机械,2026,(3):31-37,42,8.基金项目
山西省重点研发计划(202302100401009) （202302100401009）
山西省青年基金(202303021222165) （202303021222165）
山西省重大科技专项(202201150401019) （202201150401019）
