[1]戎红仁,杨 光,顾 浩.二元合金冷却曲线的分段点及过冷修正[J].常州大学学报(自然科学版),2011,(01):74-78.
　RONG Hong-ren,YANG Guang,GU Hao.Piecewise Point in Cooling Curve of Binary Alloy and Supercooling Correction[J].Journal of Changzhou University(Natural Science Edition),2011,(01):74-78.
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二元合金冷却曲线的分段点及过冷修正()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2011年01期
页码:
74-78
栏目:
出版日期:
2011-01-01

文章信息/Info

Title:
Piecewise Point in Cooling Curve of Binary Alloy and Supercooling Correction
作者:
戎红仁; 杨 光; 顾 浩
常州大学 石油化工学院,江苏 常州 213164
Author(s):
RONG Hong-ren; YANG Guang; GU Hao
School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China
关键词:
冷却曲线;  分段函数;  分段点;  角点;  逐步逼近法;  修正过冷
Keywords:
cooling curve;  piecewise function;  piecewise point;  corner point;  step-by-step method;  correction of supercooling distortion
分类号:
O 643
文献标志码:
A
摘要:
对二元合金相图绘制的内容,研究了3个问题:①用连续的分段函数表征二元合金相图的冷却曲线; ②冷却曲线的一级导数曲线是不连续的; ③根据实验数据,用有限外延法和逐步逼近法进行修正可以得到满意的结果。
Abstract:
Phase diagram of binary components has been included inmany experimental textbooks for its important industrial applicable values. On the basis of the researches, three mutual problems were further studied in details. Firstly, the cooling curve was characterized by piecewise function and the piecewise point must be the phase transition point. All of the piecewise points onthe cooling curves can not be derivative, but two half-tangents exist at each of the above piecewise points. These characteristics accord with the definition of “corner point” in calculus and the phase diagram in equilibrium state. So the basic term “corner point” is suggested now for the piecewise points on the cooling curves. Secondary, the first derivative curve of the cooling curve must be discontinuous and should not be like the continuous form shown in the literature and the discontinuous point corresponds to the phase transition point. Thirdly, according to the experimental data, the high result obtained by extrapolationmethod reported in the literature was due to the long period of supercooling. Satisfactory results can be obtained with limited extrapolation and step-by-stepmethod suggested.

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备注/Memo

备注/Memo:
作者简介:戎红仁(1967-),男,江苏丹阳人,硕士,副教授。
更新日期/Last Update: 2011-01-01