研究目的
To analyze complexly the formation process, the microstructure, components changes, the microhardness and the tribological behavior of single laser tracks, as well as single- and double-layer coatings when laser cladding of CuAl10Fe4 bronze as the representative of the Al-Fe powder bronze group.
研究成果
The study concludes that the powder granulation of 20–80 μm is optimal for coaxial laser cladding of Al-Fe bronze. It identifies the influence of laser spot velocity and nozzle-surface distance on single track dimensions and microhardness. The study also highlights the stable friction coefficient and increased wear resistance at certain cladding speeds under dry friction conditions, and the sharp increase in wear rate under lubricated friction conditions with increased pressure.
研究不足
The study is limited to the specific conditions of laser cladding of Al-Fe bronze on AISI 1045 steel substrate. The findings may not be directly applicable to other materials or cladding conditions. The study also notes the absence of experimental studies on the specifics of single tracks and coatings applied in one or two layers on the substrate in a complex manner.
1:Experimental Design and Method Selection:
The study involved laser cladding of Al-Fe powder bronze on AISI 1045 steel substrate using a CO2 laser. The methodology included analyzing the effect of gas flow and pressure on powder flow, and the impact of laser cladding conditions on the coating's properties.
2:Sample Selection and Data Sources:
Al-Fe powder bronze with specific chemical composition was used. Samples were prepared with diameters of 50 mm and widths of 10 mm for material properties and microhardness studies.
3:List of Experimental Equipment and Materials:
A CO2 laser 'Comet 2' with a power of 1 kW, optical microscope, 'Mira' scanning electron microscope, EDX method for elements identification, Micromet II tester for microhardness, and a CITIZEN CY-124 analytical balance for weight measurements.
4:Experimental Procedures and Operational Workflow:
The study included measuring powder flow, analyzing single track and coating geometries, microstructure examination, phase composition analysis, microhardness testing, and tribological tests under dry and lubricated friction conditions.
5:Data Analysis Methods:
Statistical analysis was performed using Statistica 13 software. The study included regression analysis for track dimensions and microhardness distribution analysis.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容