粉末圧延法によるチタン薄板の製造

概要

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In order to produce titanium sheets by the powder rolling method, the various factors for the production of the sheet were examined. Some mechanical and corrosion properties of the sheet were also examined. The results obtained are summarized as follows: (1) For a given roll diameter (300 mm), a satisfying green sheet was obtained under the rolling conditions: that is roll gap of 0-0.1 mm, and roll speed of 6 r.p.m.. (2) The densification of the green sheet was small during sintering except initial stage of sintering. The density of the sheets sintered at 1300°C for 60 min was the order of 4.0 g/cm3, which corresponds to 88% of the theoretical density. Therefore, these sheets were porous and brittle. (3) The oxygen content of the sintered sheet was in the range of 0.1%-0.13%. This content was not influenced by the experimental sintering temperatures, times and atmospheres. (4) The density of sintered sheet increased markedly with cold-reduction, and after 50% reduction of thickness it reached the theoretical density. (5) The mechanical and corrosion properties of the sheet depend on final annealing variables, especially annealing temperature. These properties comparable to the wrought titanium were obtained when the sheet was annealed at a temperature over 1000°C.
社団法人粉体粉末冶金協会の論文