Affiliation:
1. School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong 723001, China
2. School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China
3. National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
Abstract
Optimum laser cladding processing parameters were obtained based on the study of various powder mass flow rates for the repair of 27SiMn steel parts using Inconel 718 powder. In this study, fusion coating process parameters were set according to the influence of powder mass flow rates on fusion coating properties. The cross-sectional microstructure, X-ray diffraction patterns, micro-hardness distribution, friction, wear properties, impact properties, and fracture morphology of the clad layers were investigated for the various process parameters. The results indicate that the volume fraction for the Ni3Fe phase increases and then decreases as the powder mass flow rate increases. The micro-hardness, friction properties, and impact properties of the samples followed the same trend as those of Ni3Fe. At powder mass flow rates up to 20 g/min, microstructures in the cladding layer tended to be uniform with microstructures with fine grains, and micro-hardness and impact toughness reached maximum values of 328.2 HV0.5 and 45.4 J/cm2, respectively, which show better mechanical properties and wear resistance.
Funder
Foundation of Key Laboratory of National Defense Science and Technology
National Natural Science Foundation of China
Shaanxi Province key research and development plan
Fully mechanized mining hydraulic support remanufacturing key technology research “scientist + engineer” team
Innovation Fund for graduate students of Shaanxi University of Technology: Mechanism and method of multi-energy field cooperative regulation of coating shape in laser cladding additive manufacturing
General Special Research Project of Shaanxi Provincial Department of Education
Research Fund of Shaanxi University of Technology
Laser additive remanufacturing process and shape control method for functional coatings
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces