摘要
文章从激光熔覆和氩弧焊工艺对Stellite6 粉末在Cr2Ni12MoV进行熔覆和焊接,研究其样品涂层冷热疲劳性能.在最优的工艺参数下,对比不同加工工艺样品的冷热疲劳 70 次后试验结果.结果表明:高速激光熔覆在功率 3300W、线速度 2.0m/min、光斑大小 3.0-3.3mm、送粉量 4.7r/min、搭接率 0.77 和涂层厚度是 0.4mm的样品和传统激光熔覆在功率 1800W、线速度 300mm/min、光斑大小 2.0-2.5mm、送粉量 2.0r/min、搭接率 0.75 和涂层厚度是 0.8mm、1.2mm的样品 70 次冷热疲劳后效果最好,没有发现任何裂纹、气孔、刮痕.
Abstract
In this paper,Stellite6 powder was cladded and welded at Cr2Ni12MoV by laser cladding and argon arc welding to study the cold and hot fatigue properties of the sample coating.Under the optimal process parameters,the test results of 70 times of cold and hot fatigue of samples with different processing techniques were compared.The results show that the high-speed laser cladding has a power of 3300W,a linear speed of 2.0m/min,a spot size of 3.0-3.3mm,a powder feed of 4.7r/min,a lap ratio of 0.77 and a coating thickness of 0.4mm,and a traditional laser cladding with a power of 1800W,a linear speed of 300mm/min,a spot size of 2.0-2.5mm,a powder feed of 2.0r/min,a lap rate of 0.75 and a coating thickness of 0.8mm.The 1.2mm sample had the best effect after 70 times of hot and cold fatigue,and no cracks,pores,or scratches were found.
NETL
NSTL
万方数据