80Ni20Cr溶射皮膜の熱応力と溶射残留応力の制御

概要

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An experimental and analytical studies of thermal stress of thermally sprayed coating of 80Ni20Cr/SUS304 cylindrical member were performed to investigate a control method of residual stress of coating after thermal spraying. Temperature measurement during processes of thermal spraying, heating-up and cold thermal shock were made. Using these measured results, thermal stress analysis were carried out by FEM and a proposed simplified method. Thermal stress of coating obtained by FEM was compared with one by the simplified method and good agreement was obtained between them. Moreover, residual stress of coating after thermal spraying was measured by X-ray diffraction method and compared with estimated results. As a result, good agreement was obtained. Based on the simplified method, a control method of residual stress of coating after thermal spraying was proposed. According to this control method, compressive residual stress can be expected by controlling temperature of substrate properly in spite of relation of magnitude of thermal expansion coefficient of coating and that of substrate.
社団法人日本機械学会の論文
1998-02-25