研究目的
To determine the effect of laser exposure regimes on the coating formation process, as well as the elemental and phase composition of copper-based hybrid coatings obtained by melting the modified powder.
研究成果
The study confirmed high rates of antifriction properties of the bronze coating on a copper substrate. X-ray diffraction analysis revealed the presence of intermetallide peaks Cu6Sn5 and Cu3Sn. The optimal set of parameters for obtaining the best quality coating was determined.
研究不足
The rapidity of the heating and solidification process leads to dynamic mixing of the melt components, but mainly bronze is observed only by a thin layer on the surface of the copper substrate, thus maintaining high electrical and thermal conductivity of the resulting structure.
1：Experimental Design and Method Selection:
The study involved the use of continuous laser radiation to produce antifriction coatings on copper substrates. The powder material was uniformly distributed on the substrate and subjected to laser melting under various conditions.
2：Sample Selection and Data Sources:
Copper substrates were used as experimental preforms. A tin-lead powder with particle sizes from 50 to 80 μm was applied uniformly on the substrate.
3：List of Experimental Equipment and Materials:
The industrial complex for selective laser melting Concept Laser M2 Cusing (Germany) was used. The laser had a wavelength of 1.06 μm and power up to 400 W.
4：06 μm and power up to 400 W.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The samples were subjected to continuous laser radiation with varying scanning speeds (500-1500 mm/s), power (80 to 120 W), and fill density (10-40 lines/mm). The thickness of the layer did not exceed 100 μm.
5：Data Analysis Methods:
X-ray diffraction analysis was performed using the D8 ADVINCE unit (BRUKER, Germany). Tribology tests were carried out on the CSM tribometer.
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