焊管2024，Vol.47Issue(9)：21-27,7.DOI:10.19291/j.cnki.1001-3938.2024.09.004
比能量对激光熔覆Ni60组织及力学性能的影响
Effect of Specific Energy on Microstructure and Mechanical Properties of Ni60 by Laser Cladding
沈虎 1李先芬 1叶俊洋 1徐政 1华鹏 1刘大双1
作者信息
- 1. 合肥工业大学 材料科学与工程学院,合肥 230009
- 折叠
摘要
Abstract
A nickel-based composite coating was prepared on 42CrMo steel plate using laser melting of Ni60 alloy powder.The comprehensive effects of laser power and scanning speed on the microstructure and friction wear properties of the laser clad layer were investigated.The surface morphology,microstructure,physical phase,vickers hardness,wear resistance and shear strength of the cladding layer were also analyzed.The results show that the Ni60 clad layer has the same physical phase at different specific energies,and the surface of the cladding layer will produce large spattering or ablation when the energy is too high or too low.The microhardness is significantly higher than that of the substrate,about 1.4～1.96 times that of the substrate,and gradually increases with the decrease of specific energy,while the friction coefficient and wear amount gradually decrease with the decrease of specific energy.The cladding layer has high shear strength,which can reach 225～259 MPa.When the specific energy is 4.8 kJ/cm2,the surface splash of the clad layer is small,the fish scale pattern is closely arranged and the thickness is uniform,the microstructure is dense.The mechanical properties are excellent and the clad layer achieves a good metallurgical bond with the substrate.关键词
激光熔覆/镍基合金/比能量/显微组织/力学性能Key words
laser cladding/nickel-based alloys/specific energy/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
沈虎,李先芬,叶俊洋,徐政,华鹏,刘大双..比能量对激光熔覆Ni60组织及力学性能的影响[J].焊管,2024,47(9):21-27,7.
