母合金混合法による焼結モネル合金の製造について

概要

論文の詳細を見る
In an attempt to obtain a high density Monel alloy by a single pressing and sintering process, sintering of the mixtures of master alloy and nickel powder was discussed, and their pressing and sintering characteristics were compared with those of the mixture of nickel and copper elemental powders and also of the pre-alloyed powder. The result was summarized as follows; 1) Green compacts fabricated from the mixture of master alloy and nickel powder showed a high strength. For example, transverse rupture strength of 30Ni-70 (50Ni-50Cu) powder compact pressed at 5t/cm2 was 4.0kg/mm2. 2) Pores created in the side of the master alloy during sintering decreased considerably by the use of 50Ni-50Cu alloy instead of 40Ni-6OCu alloy. This indicates that the concentration of the copper in the master alloy should be less than 50 percent. 3) By using 50Ni-50Cu alloy powder, the compact pressed at 6t/cm2 and sintered at 1200°C for 120 min showed the density of 8.55g/cc, and the shrinkage of 3.4 percent. 4) The sintered alloy with the density of 8.55g/cc showed the tensile strength of 36.7kg/mm2 and the elongation of 34.0 percent.
社団法人粉体粉末冶金協会の論文