研究目的
Investigating the influence of laser deposition parameters on the metallurgy of deposited layers, mechanical characteristics, and deformations of samples made of PC E36 steel and 15Cr11MoW steel, to enhance erosion resistance of rotor blades.
研究成果
Laser cladding of Stellite 6 alloy on steel 15Cr11MoW, with an Inconel 625 intermediate layer, prevents cracks and enhances erosion resistance. Optimal cladding parameters and directions were identified to minimize deformations. The process significantly increases microhardness and maintains or improves mechanical properties, making it a promising method for enhancing the durability of turbine blades.
研究不足
The study identified that deformations increased after heat treatment, suggesting the need for technological measures to control stiffness during the entire technological cycle, including heat treatment.
1：Experimental Design and Method Selection
The study involved laser cladding experiments using Stellite 6 and Inconel 625 metal powders on steel samples to analyze the effects on metallurgy, mechanical characteristics, and deformations.
2：Sample Selection and Data Sources
Samples were made of PC E36 steel and 15Cr11MoW steel plates. The chemical composition of these materials was provided for analysis.
3：List of Experimental Equipment and Materials
LS-5 ytterbium fiber laser (IPG), Riedel PC 160 chiller, D30 laser head, Buehler sand-preparation system, optical microscope DMI 5000 (Leica), Micromet 5103 microhardness meter (Buehler), scanning electron microscope (Phenom ProX and Mira Tescan), Zwick / Roell Z250 tensile testing machine.
4：Experimental Procedures and Operational Workflow
Laser deposition was performed under varying parameters (laser power, deposition rate, spot diameter, powder flow rate). Samples underwent mechanical testing (tensile, impact bending, static bending) and microhardness measurements. Some samples were heat-treated post-cladding.
5：Data Analysis Methods
Microhardness was measured according to DIN EN ISO 14577. Tensile tests followed GOST 6996-66 and DIN EN ISO 6892-1:2009. Impact toughness and static bending tests were conducted to evaluate mechanical properties.
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LS-5 ytterbium fiber laser
LS-5
IPG
Used for laser cladding experiments
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Optical microscope DMI 5000
DMI 5000
Leica
Analysis of the macrostructure
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Riedel PC 160 chiller
PC 160
Riedel
Cooling system for the laser cladding setup
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D30 laser head
D30
Part of the laser cladding system
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Buehler sand-preparation system
Buehler
Used for preparing transverse macrosections of the deposited layers
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Micromet 5103 microhardness meter
5103
Buehler
Measuring the microhardness of the deposited metal
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Scanning electron microscope
Phenom ProX and Mira Tescan
Determining the distribution of alloying elements of the deposited metal
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Zwick / Roell Z250 tensile testing machine
Z250
Zwick / Roell
Conducting tensile strength tests
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