Effect of Laser Power on Macromorphology, Microstructure and Performance of Ti6Al4V/NiCr-Cr3C2 Cladding Coatings

被引：0
作者：
Zhang Z. [1 ]
Yang Q. [1 ]
Yu Z. [1 ]
Zhang T. [1 ]
Lu X. [1 ]
Wang H. [2 ]
机构：
[1] School of Aeronautical Engineering, University of Civil Aviation University of China, Tianjin
[2] School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 02期
基金：
中国国家自然科学基金;
关键词：
forming quality; laser cladding; laser power; microstructure; Ti6Al4V; wear resistance;
D O I：
10.11896/cldb.22100243
中图分类号：
学科分类号：
摘要：
Laser power is an important factor affecting the quality of the cladding coatings. In order to reveal the influence of laser power on the forming quality, microstructure, and wear resistance of Ti6Al4V/NiCr-Cr3 C2 composite coating, multi-track overlapping TiC reinforced composite coatings were prepared on the surface of Ti6Al4V substrate by laser cladding technology with coaxial powder feeding. The surface cracks, cross-section morphology, porosity, dilution rate, geometric characteristics, and microstructure of the cladding coatings were analyzed by penetration detection, optical microscopy, X-ray diffraction, and scanning electron microscopy (SEM)with energy dispersive spectrometer (EDS). Vickers microhardness tester and friction and wear tester were used to measure the microhardness and wear resistance of the cladding coatings. Finally, the quality of the cladding coatings was evaluated based on the influence of forming, microstructure and performance. The results showed that the laser power had a significant effect on the forming quality of the cladding coating. When the laser power was 1 100 W and 1 300 W, there were many defects such as cracks and pores on the surface of the cladding coating. With the increase of laser power, the melting height, melting width, melting depth, and dilution rate of the cladding coating were improved continuously. However, the crack rate and porosity continued to decrease. The laser power had little effect on the types of phases in the coatings, and the main phases were the reinforcement phase TiC and the matrix phase CrTi4. When the laser power was 1 500 W and 1 700 W, the hardness of the cladding coating was high, and the wear rate was low. Considering the influence of laser power on the cladding coatings in many aspects, the optimal laser power was finally determined as 1 500 W. The cladding coating prepared under this laser power had good forming quality and excellent wear resistance. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
引用
收藏
相关论文
共 29 条
  • [1] Li Y, Zhao Y Q, Zeng W D., Materials Reports, 34, (2020)
  • [2] Tan J H, Sun R L, Niu W, Et al., Materials Reports, 34, 15, (2020)
  • [3] Gu J, Liu Z P, Xu Y J, Et al., Applied Laser, 40, 3, (2020)
  • [4] Zhang L T, Liu D X, Zhang W Q, Et al., Surface Technology, 49, 8, (2020)
  • [5] Li H B, Gao Q Q, Li K Y, Et al., Chinese Journal of Lasers, 48, 18, (2021)
  • [6] Xia T C, Liu T, Zhang L, Et al., Heat Treatment of Metals, 46, 5, (2021)
  • [7] Zhang Z Q, Yang F, Zhang H W, Et al., Materials Characterization, 171, (2021)
  • [8] Zhang Z Q, Yang F, Zhang H W, Et al., Acta Aeronautica et Astronautica Sinica, 42, 7, (2021)
  • [9] Meng G R, Zhu L D, Zhang J D, Et al., Optik, 240, (2021)
  • [10] Monammed J K, Sami I A, Ali S H., Optics and Lasers in Engineering, 51, 2, (2013)
123