Fe-Cu-C系圧粉体の焼結サイクルにおける膨張収縮

概要

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In order to clarify the complex dimensional change which occurred during sintering of Fe-Cu-C sintered alloys, swelling and shrinkage during sintering cycle have been investigated by means of a specially-made dilatometer.<BR>In both Fe-Cu and Fe-C binary powder compacts, the swelling at high temperature increased in proportion to the amount of respective constituents. However in the case of Fe-Cu-C ternary powder compacts, the amount of swelling at high temperature did not agree with the sum of that of each binary system. With increasing the contents of both Cu and C, the swelling at high temperature became larger, but inversely the dimensional change at room temperature was less. This phenomenon is closely relatel with not only the decrease of copper growth by the addition of C, but also the change of gradient of dilatometric curve during cooling in the range of γ phase, affected by the addition of more Cu and C.
社団法人粉体粉末冶金協会の論文