日本金属学会誌

J. Japan Inst. Metals, Vol. 5, No. 4 (1941),
pp. 136-157

The Equilibrium Diagram of the Iron-bearing Aluminium Bronze

Aoyama Yutaka1

1藤倉電線株式會社

Abstract:

The present writer investigated the equilibrium relation of the ternary system Cu-Al-Fe from the Cu-Fe side up to the Al-content of about 20% by weight. The results obtained may be summarized as follows:-
(1) In the ternary field herein studied, there exist 3 non-variant reactions, viz.,
_??_
(2) The mono-variant curve of the peritectic reaction Melt+δ-Fe_??_γ-Fe, originated from the Fe-Cu system, passes along the Fe-Cu side, and reaches the non-variant reaction at 1072°.
(3) The eutectoid change γ-Fe_??_δ-Fe+α originates from the Fe-Cu system also reaches above mentioned reaction, rising its reaction temperature with the increase of Al-content.
(4) The mono-variant peritectic reaction, originated from the Fe-Cu side at 1094°, passes almost parallel to the Cu-Al side, lowering gradually its reaction temperature with the increase of Al-content.
(5) The eutectic reaction Melt_??_α+β of the binary Cu-Al system continues up to the di-peritectic reaction at 1048°.
(6) The eutectoid change β_??_α+γ of the binary Cu-Al system together with the ones, β_??_α+δ-Fe and β_??_γ+δ-Fe, makes the ternary eutectoid change at 568°.
(7) In the mono-variant curve of the peritectic reaction Melt+δ-Fe_??_β, there is a peak at 1075°, its composition being Al=13.5, Fe=6.5% and Gu bal. by weight.
(8) γ-Fe appears as primary crystal in the narrow domain, whereas the primary surface of δ-Fe spreads from Fe-Al side to the Cu-corner.
(9) At high temperature, both α and β dissolve some δ-Fe, and precipitate it in the cooling.
(10) The globular phase found in the micro-structure of the industrial iron-bearing aluminium bronze is δ-Fe containing Cu and Al as solid solution.
In the appendix author discusses the role of iron in the industrial aluminium bronze.


(Received 1941/01/08)

Keywords:


PDF(Free)PDF (Free)     Table of ContentsTable of Contents

Please do not copy without permission.