粉末圧延法による自己潤滑性焼結板の開発(第一報) : 黒鉛を含む銅―ニッケル―すず系の粉末圧延条件について

概要

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For the purpose to develope the self-lubricating sintered plates having high wear resistances for pressing machines and general industrial machines, powder rolling of premixed powders consists of Cu-28 wt%Ni-8 wt%Sn-5 wt%Fe-7 wt%(15P-Cu)-5 wt%C containing hydroxypropyl cellulose as an organic binder was performed using a mill with a working roll diameter of 600 mm. Thicknesses and apparent densities of rollcompacted sheets were measured, and the tensile strength of sintered sheets was investigated. Results obtained are as follows: (1) Keeping a constant depth (55 mm) of feed powder in hopper, the rolling load depends on the roll gap at the conditions of roll speeds from 0.3 to 0.7 m/min and the apparent density of green sheet increases gradually from 5.5 to 6.6 g/cm3 as the rolling load rises. (2) The tensile strength of roll-compacted sheets produced at roll speed 0.3 m/min, roll gap -0.2, 0 and +0.3 mm respectively depends on the sintering temperature, and the sheet after sintering for 40 min at 1250 K showed the tensile strength of maximum 160 MPa.
社団法人粉体粉末冶金協会の論文