RECALESCENCE EFFECT SIMULATION AND MICROSTRUCTURE EVOLUTION OF UNDERCOOLED Fe82B17Si1 ALLOY

doi:10.3724/SP.J.1037.2013.00813

Acta Metall Sin

2014, Vol. 50

Issue (7): 795-801 DOI: 10.3724/SP.J.1037.2013.00813

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RECALESCENCE EFFECT SIMULATION AND MICROSTRUCTURE EVOLUTION OF UNDERCOOLED Fe₈₂B₁₇Si₁ ALLOY

CHEN Zheng^1,²(

), YANG Yanan¹, CHEN Qiang¹, XU Junfeng², TANG Yueyue¹, LIU Feng²

1 School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116
2 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi′an 710072

Cite this article:

CHEN Zheng, YANG Yanan, CHEN Qiang, XU Junfeng, TANG Yueyue, LIU Feng. RECALESCENCE EFFECT SIMULATION AND MICROSTRUCTURE EVOLUTION OF UNDERCOOLED Fe₈₂B₁₇Si₁ ALLOY. Acta Metall Sin, 2014, 50(7): 795-801.

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Abstract

通过熔融玻璃净化与循环过热相结合的方法获得过冷度ΔT=6~280 K范围内的Fe₈₂B₁₇Si₁共晶合金的凝固组织演变; 结合突变方程和JMAK模型拟合凝固过程的冷却曲线, 拟合结果符合Fe₈₂B₁₇Si₁共晶合金的组织类型及形态随过冷度的变化规律. 结果表明, 当6 K≤ΔT<75 K时, Fe₈₂B₁₇Si₁合金中形成了复杂规则共晶及准规则共晶组成的混合共晶组织; 当75 K≤ΔT<180 K时, 凝固组织由混合共晶组织和深过冷非规则共晶组织组成; 当180 K≤ΔT<250 K时, 凝固组织由不同含量的初生a-Fe相和枝晶间深过冷非规则共晶组织组成; 当ΔT >250 K时, 凝固组织为完全非规则共晶组织.

Key words: Fe₈₂B₁₇Si₁ alloy JMAK model undercooling eutectic structure

Received: 13 December 2013

ZTFLH:	TG115.21
	TG146

Fund: Supported by National Natural Science Foundation of China (No.51101169), Fundamental Research Funds for the Central Universities (No.2014QNA07) and China Postdoctoral Science Foundation (No.2013M540475)

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	Zheng CHEN
	Yanan YANG
	Qiang CHEN
	Junfeng XU
	Yueyue TANG
	Feng LIU

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00813 OR https://www.ams.org.cn/EN/Y2014/V50/I7/795

Fig.1

Fe₈₂B₁₇Si₁合金在不同过冷度下的SEM像

Fig.2

不同过冷度下Fe₈₂B₁₇Si₁共晶合金凝固过程中的冷却曲线

Fig.3

不同过冷度下Fe₈₂B₁₇Si₁合金试样冷却的拟合曲线与实验曲线

表1 一次再辉冷却曲线实验及拟合结果

Fig.4

ΔT=145 K时Fe₈₂B₁₇Si₁合金冷却的实验和拟合曲线

Fig.5

Fe₈₂B₁₇Si₁合金的拟合B_S和B_L值随过冷度的变化

Fig.6

过冷度∆T≥209 K的范围内Fe₈₂B₁₇Si₁合金非规则共晶中Fe₂B相的OM像

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