ステンレス鋼の粉末鍛造 (粉末冶金<特集>)
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概要
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Typical stainless steels were made by the powder forging process, using, as starting materials, commercial water atomized powders with compositions corresponding to SUS 316L, 410L and 430L.Their tensile properties and impact values were measured and compared with those of JIS for wrought materials.To obtain forged products with 99% density ratio, the forging pressure more than 8ton/cm2 was necessary in the case of 410L and 430L, whereas in the case of 316L the pressure more than 14ton/cm2 was necessary.Tensile properties of forged products with 99% density ratio were almost equivalent to those indicated by JIS.However, their U-notched Charpy values were much lower than those of JIS, because of their surface defects induced by the preferential oxidation of chromium during the heating prior to the forging.
- 大同特殊鋼株式会社の論文