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CT-250S/CT-250V Manual Sectioning Machine
CT-250S/250V is a manual sectioning machine designed with safety and environmental principles in min...
Thermal spraying is an advanced surface engineering technology that heats materials to a molten or semi-molten state, then sprays them onto a substrate surface at high velocity to form a functional protective coating.
Like applying custom-made armor to workpieces, it significantly improves key properties including wear resistance, corrosion resistance, high-temperature resistance, thermal insulation, electrical insulation or conductivity.
From flame spraying, arc spraying to plasma spraying, processes have been continuously upgraded, and coating quality and precision have steadily improved. It is widely used in high-end manufacturing sectors such as aerospace, petrochemical, machinery, and molds.
As a critical method for evaluating coating quality, metallographic analysis accurately characterizes porosity, interfacial bonding, phases, and coating thickness, providing essential data for process optimization and quality control.
The evaluation of coating properties highly depends on accurate metallographic examination, and sample preparation quality directly determines result reliability.
Common issues such as misjudged porosity, artificial cracks, and interface damage are often caused by improper preparation procedures, rather than actual defects in the coating.
Below is a recommended metallographic preparation workflow for flame-sprayed coatings:
1️⃣ Plane using P180 metallographic abrasive paper
2️⃣ Fine grind with POS grinding disc + 9 μm PD-WT polishing suspension
3️⃣ Rough polish with GF-JP polishing cloth + 3 μm PD-WT polishing suspension
4️⃣ Final polish with ET-JP polishing cloth + 1 μm PD-WT polishing suspension
#TROJAN #Trojanmetallography #Metallographic #Material
