CAJ | 학술논문

采用超音速火焰喷涂技术在低碳钢表而喷涂Cr_3C_2-NiCr涂层,然后在不同工艺参数下对其进行激光重熔处理.考察不同重熔参数下涂层的冲蚀性能.并与喷涂层对比.结果表明:在激光功率3.0 kW,扫描速率50mm/s的工艺参数下激光重熔.涂层的冲蚀失重最小.所形成的涂层表面均匀性较好;重熔层的致密度要优于喷涂层,重熔后涂层由机械结合转变为冶金结合;南于表面氧化层的存在和内部冶金结合的形成,重熔层硬度较喷涂层高.
채용초음속화염분도기술재저탄강표이분도Cr_3C_2-NiCr도층,연후재불동공예삼수하대기진행격광중용처리.고찰불동중용삼수하도층적충식성능.병여분도층대비.결과표명:재격광공솔3.0 kW,소묘속솔50mm/s적공예삼수하격광중용.도층적충식실중최소.소형성적도층표면균균성교호;중용층적치밀도요우우분도층,중용후도층유궤계결합전변위야금결합;남우표면양화층적존재화내부야금결합적형성,중용층경도교분도층고.
Cr_3C_2-NiCr coatings were sprayed on low carbon steel using high velocity oxy-fuel spraying,and then remelted by laser at different parameters.The erosion properties of spraying coatings and remelting coatings were inspected.The results show that the mass loss of coatings remelting at the power of 3.0 kW and the scanning velocity of 50 mm/s are the least.It is concluded that the surface is uniform at aforementioned parameters.The density of remelting coating is better than that of spraying coating because of metallurgical bonding.Microhardness of the remelting coating is higher than that of spraying coating because of oxide layer and metallurgical bonding.