open access

https://hdl.handle.net/2115/74711

Formation mechanism of composite layer in hyperperitectic Al-Cr alloy ingot produced by injection quenching

日本語

solidification structure

1997-10-25

日本鋳造工学会

Journal of Japan Foundry Engineering Society

69(10)

822-827

In order to examine the formation mechanism of the double composite layer which occasionally forms in the Al-transition metal alloy pipes produced by Centrifugal Duplex Casting, a model experiment named “Injection Quenching” has been executed. In this experiment, a hyperperitectic Al-Cr alloy melt (the jet melt) was injected into a molten aluminum (the bulk melt) to be cooled rapidly. The primary intermetallic compound particles sedimented to the bottom of the mold. The mixed alloy was furnace-cooled, and was quenched at a given temperature to freeze the distribution of the primary particles. The obtained results are summarized as follows : (1) The primary particles crystallized with “copious nucleation” in the jet melt constitute the fine composite layer. (2) After the formation of the fine composite layer, floating particles dispersed in the bulk melt grow and pile up on the fine composite layer to constitute the coarse composite layer.

学術雑誌論文

Version of Record

1342-0429

2185-5374

AN10514770