【摘要】 采用CO2激光器及LASERCELL-1005六轴六联动三维激光加工机床,利用粉末预置法在40Cr钢上进行激光熔覆处理。利用EG&G M273电化学测试系统测试了激光熔覆前后样品的耐腐蚀性能。结果表明,激光熔覆处理后,样品的耐腐蚀性能明显增强;熔覆样品的耐腐蚀性能随扫描速度的变化趋势是先增加后降低。扫描速度为0.5 m/min时,耐腐性最佳;大面积激光熔覆的耐蚀性不及单道激光熔覆,多道搭接试样的耐蚀性不及多层叠加试样。更多还原

【Abstract】 40Cr laser cladding was carried out by CO2 laser and the LASERCELL-1005 six axes sixlinkages three dimensional laser processing machine tools.The corrosion resistance of samples before and after laser cladding was investigated by EG&G M273 electrochemical measurement system.The results showed that the corrosion resistance was enhanced after laser cladding and the corrosion resistance increased firstly and then decreased with the increase of scan speed V.The best corrosion resistance was obtained when V= 0.5 m/min.the corrosion resistance of large area laser cladding was inferior to that of single-pass laser cladding,and the corrosion resistance of multilayer overlay samples was superior to that of multitrack overlapped samples.更多还原