摘要
采用火焰喷涂技术在316L不锈钢表面制备Ni55A合金涂层,对涂层分别进行火焰重熔和真空重熔处理,分析了重熔处理对涂层微观形貌、硬度分布和孔隙率的影响。结果表明:火焰重熔和真空重熔可将火焰喷涂涂层的孔隙率从4.2%分别降低到0.34%和0.86%,并将基体与涂层界面处的结合状态由机械结合变为冶金结合;与火焰重熔相比,真空重熔后涂层与基体界面处的扩散层厚度更大,组织更粗大,孔隙形状更加不规则;火焰重熔和真空重熔后涂层的平均硬度分别提高了60,15 HV,火焰重熔后涂层的硬度较高且硬度波动较小。
Ni55A alloy coating was prepared on the surface of 316L stainless steel by flame spraying,and then was treated by flame remelting and vacuum remelting,respectively.The effects of the remelting treatment on the micromorphology,hardness distribution and porosity of the coating were analyzed.The results show that the flame remelting and vacuum remelting could reduce the porosity of the flame sprayed coating from 4.2%to 0.34%and 0.86%,respectively,and change the bonding state from mechanical bonding to metallurgical bonding at the interface between the substrate and coating.The thickness of the diffusion layer at the interface between the coating and substrate after vacuum remelting was larger than that after flame remelting,the structure was coarser and the pore shape was more irregular.The average hardness of the coating after flame remelting and vacuum remelting increased by 60,15 HV,respectively.The hardness of the coating after flame remelting was relatively high,and the hardness fluctuation was relatively small.
作者
王学朋
马军
赵文宝
徐喜龙
杨树华
邓德伟
WANG Xuepeng;MA Jun;ZHAO Wenbao;XU Xilong;YANG Shuhua;DENG Dewei(Wuzhong Instrument Co.,Ltd.,Wuzhong 751100,China;R&D Division of Shenyang Blower Works Group Corporation,Shenyang 110869,China;Technology Innovation Centre for Laser 3D Printing Equipment and Applications(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2023年第5期8-13,共6页
Materials For Mechanical Engineering
基金
高端控制阀产业技术协同创新中心基金资助项目(2018WZ003)
辽宁重大装备制造协同创新中心基金资助项目(DUT2017031)。
