研究目的
Investigating the influence of powder condition on the surface properties of cold-resistant high-strength steel produced by direct laser deposition method, focusing on corrosion, abrasive-corrosion, and wear resistance.
研究成果
Increasing of used powder concentration raises the corrosion-abrasive wear of the samples. However, prolongation of exposure time, the abrasive wear for samples deposited from different powder conditions becomes almost the same. Corrosion and spinning friction wear resistance for all samples deposited from different powder conditions corresponds with the materials obtained by conventional technologies of drowning and casting.
研究不足
The study did not find a clear dependency of the initial powder condition effect on corrosive wear and spinning friction wear. The influence of the filler powder quality parameters is not significant during long-term exploitation.
1：Experimental Design and Method Selection:
The study involved direct laser deposition (DLD) of high-strength cold-resistant steel using different powder conditions. The process was conducted on a laser technological machine equipped with an industrial robot, laser irradiation source, laser head, and powder feeder.
2：Sample Selection and Data Sources:
Steel powder 09CrNi2MoCu with a fracture of 45-160 μm was used. The powder was obtained by gas atomization process.
3：List of Experimental Equipment and Materials:
Laser technological machine based on industrial robot LRM-200iD_7L, Fanuc; laser irradiation source LS 5, IPG Photonics; laser head FLW D30, IPG Photonics with removable cladding nozzle COAX9, Fraunhofer IWS; powder feeder Sulzer Metco Twin 10C.
4：0C.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The study was conducted in two stages: determining technological parameters for as-received powder and then varying the condition of the filler powder while keeping the parameters fixed.
5：Data Analysis Methods:
Corrosion and abrasive corrosion rate were measured by mass loss. Tribotechnical tests were conducted using a face friction machine PBD-40.
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