Influence of Processing Conditions on the Thermal Spraying Coating(Materials, Metallurgy & Weldability)

概要

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The mechanical properties of 80%Ni-20%Cr alloy sprayed at each spraying condition are investigated by means of tensile strength test and Arata Coating Test with Jet Particles. The relation between the microstructure and the properties of the sprayed coatings are examined. Moreover, the effect of spraying condition on the mechanical properties was discussed on the basis of the oxidation behaviour during spraying and dynamic behaviour observation of the particles at adhesive stage. Main conclusion obtained are summarized as follows. (1) The favorable mechanical properties of coatings are obtained at the spraying distance of 15〜20cm and the properties become poor with the increase of spraying distance. (2) The maximum tensile strength at the optimum distance for each spraying material decreases with the increase of particle size. (3) The mechanical properties of coatings may depend greatly on the amount of oxides in coatings formed during spraying. (4) The mechanical properties of coatings are affected by the variation of the spraying angle.
大阪大学の論文