Metallographic Measurement and Theoretical Calculation of（α+β）/βTransformation Temperature of TC4 Alloy

Liu Weidong; Qu Hua

doi:10.15980/j.tzzz.2014.11.029

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Metallographic Measurement and Theoretical Calculation of（α+β）/βTransformation Temperature of TC4 Alloy
Vol. 34, Issue 11, Pages: 1210-1213(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.11.029

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[1]刘伟东,屈华.TC4合金(α+β)/β转变温度的金相法测定与理论计算[J].特种铸造及有色合金,2014,34(11):1210-1213.

Liu Weidong, Qu Hua. Metallographic Measurement and Theoretical Calculation of（α+β）/βTransformation Temperature of TC4 Alloy. [J]. Special Casting & Nonferrous Alloys 34(11):1210-1213(2014)
[1]刘伟东,屈华.TC4合金(α+β)/β转变温度的金相法测定与理论计算[J].特种铸造及有色合金,2014,34(11):1210-1213. DOI： 10.15980/j.tzzz.2014.11.029.

Liu Weidong, Qu Hua. Metallographic Measurement and Theoretical Calculation of（α+β）/βTransformation Temperature of TC4 Alloy. [J]. Special Casting & Nonferrous Alloys 34(11):1210-1213(2014) DOI： 10.15980/j.tzzz.2014.11.029.

摘要

采用连续升温金相法测定TC4合金的相变温度为985℃。基于EET理论与钛合金相变基本理论

以纯钛的α/β转变温度为依据

利用表征合金相重构难易程度的价电子结构参数nA

合金组成相α与β的晶胞权重W

相修正系数C及β稳定元素的温度系数TMc

给出了一种计算TC4合金（α+β）/β转变温度的EET方法。用该EET理论模型计算的TC4合金的相变温度为974.58℃。TC4合金（α+β）/β转变温度的EET理论计算值与连续升温金相法试验测定值的相对误差为1.1%

说明从价电子结构层次计算TC4合金的（α+β）/β相变温度是可靠的。

Abstract

The transformation temperature of TC4 alloy is 985 ℃ measured by continuous heating metallographic method.Based on the empirical electron theory of solids and molecules

the phase transformation basic theory of titanium alloy and the transformation temperature of pure titanic

a new EET calculation method for the（α+β）/βtransformation temperature of TC4 alloy was put forward after calculating the valence electron structure parameter nA

the crystal cell weight W ofαandβin the constituent phase

the compensation factor Cof the phases and the temperature factor TMcof the stable element.The transformation temperature of TC4 alloy is 974.58 ℃ calculated by the EET calculation method.The relative error between EET calculation value and experimental measure value is only 1.1%.Therefore

it is reliable to calculate the transformation temperature of TC4 alloy based on the valence electron level.

关键词

TC4合金相变温度连续升温金相法EET计算

Keywords

TC4AlloyTransformation TemperatureContinuous MetallographicEET Calculation

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