HIP法によるFe-WC系複合材料の作製 (金属系高密度・高強度材料,傾斜機能材料,ナノメ-タコンポジット材料<特集>) -- (金属系高密度・高強度材料)

概要

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Fe-WC composite consisted of average grain sizes of 90, 110μm, respectively, was prepared by HIP technique. Although iron is easy to react with WC at high temperature about 1200°C, the reaction was successfully controlled at 800°C below 13% under hipping pressure. Therefore, dense and pore free composites with the compositions of Fe-5wt%WC and Fe-20wt%WC were obtained at 800°C, applying 50-200MPa and 200MPa, respectively, for 30min. The reaction layer around the WC grain was about 5μm in thickness, according to the EPMA observation of the cross section of the composite. The growth rate of the reaction layer largely decreased with an increase in hipping pressure. The Fe-WC composite exhibited an excellent wear resistance, which was also increased under higher hipping pressure.
社団法人粉体粉末冶金協会の論文