open access

https://hdl.handle.net/2115/75740

Rate of Peritectic Reaction in Iron-Carbon System Measured by Solid/Liquid Diffusion Couple Method

英語

iron-carbon system

1995-02-15

日本鉄鋼協会

ISIJ International

35(2)

183-187

A model experiment was made for study on the effects of temperature on the reaction rate in isothermal peritectic reaction in iron-carbon system by using a soliid/liquid diffusion couple method. Measurements of the variation in carbon concentration over δ, γ, and liquid phases show a decrease in the carbon concentration from the γ/liquid interface to the δ/γ interface and an equilibrium partition of carbon at both the interfaces. The γ-phase grows into both δ and liquid phases. A regression analysis of the thickness of the γ-phase, x (μm), with the reaction time, t (s), results in the following relations. x=36.6t1/2 at 1755 K x=54.7t1/2 at 1722 K x=71.0t1/2 at 1689 K These relationships imply that the peritectic reaction follows the parabolic law and that the reaction rate is higher at lower temperatures. It was found that about 90% of the γ-phase formed through the peritectic reaction is the transformation product from the δ-phase and about 10% the solidification product from the liquid phase.

学術雑誌論文

Version of Record

著作権は日本鉄鋼協会にある

0915-1559

AA10680712