研究目的
Investigating the effects of laser power, wire feeding speed, scanning speed, and surface roughness on clad geometry for repairing Cr12MoV die surface damage using laser cladding with wire.
研究成果
The substrate surface roughness significantly influences the cladding layer morphology due to the light trapping effect. Effective body energy Ev and specific filling rate ω are critical process control factors. Optimal conditions (Ev 80~100 J/mm3 and ω 1~3) yield a flat cladding layer with low dilution, fewer defects, and high hardness, suitable for mold repair.
研究不足
The study focuses on Cr12MoV cold work die steel and SKD11 wire, which may limit the generalizability of the findings to other materials. The effects of surface roughness are studied, but other surface treatments could also influence the results.
1：Experimental Design and Method Selection:
The study uses Nd:YAG pulsed laser for depositing SKD11 steel wire on Cr12MoV plate to repair die surface damage. The effects of various parameters on clad geometry are studied.
2：Sample Selection and Data Sources:
Cr12MoV cold work die steel is used as the substrate, and SKD11 wire is used as the filler material. Surface roughness is varied to study its effect.
3：List of Experimental Equipment and Materials:
Equipment includes Nd:YAG Pulsed Laser, KEYENCE VK-250 LSCM for morphology measurement, and XHD-1000TM digital microhardness tester for hardness testing.
4：Experimental Procedures and Operational Workflow:
The study involves varying laser power, scanning speed, wire feeding speed, and surface roughness to observe their effects on clad geometry and hardness.
5：Data Analysis Methods:
The morphology of the cladding zone is analyzed using optical microscopy and laser scanning confocal microscopy. Hardness is measured using a microhardness tester.
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