Ce/Ce-Zr夹杂物诱导高强船板钢中针状铁素体形核行为的研究

孟祥海; 王伟; 毕胜; 李运刚

doi:10.7513/j.issn.1004-7638.2022.02.022

Ce/Ce-Zr夹杂物诱导高强船板钢中针状铁素体形核行为的研究

doi: 10.7513/j.issn.1004-7638.2022.02.022

孟祥海^{1, 2,},
王伟^3, ,,
毕胜¹,
李运刚²

1.
唐山工业职业技术学院, 河北唐山 063299
2.
华北理工大学冶金与能源学院, 河北唐山 063210
3.
唐山学院机电工程系, 河北唐山 063000

基金项目: 国家自然科学基金（编号：51974129）；河北省教育厅青年基金项目（编号：QN2021316）；唐山市科技计划资助项目（编号：20130228b）。

详细信息

作者简介:
孟祥海（1983—），男，河北唐山人，博士，副教授，长期从事大线能量焊接用船板钢开发，E-mail：46957162@qq.com

通讯作者:
王伟（1983—），女，河北唐山人，从事焊接夹具设计及机械制造技术研究，E-mail：wwang302@163.com

中图分类号: TF76,TF704.2
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-29
- 网络出版日期: 2022-05-11
- 刊出日期: 2022-04-28

Research on IAF nucleation behavior induced by Ce/Ce-Zr inclusion in high strength steel plate for shipbuilding

Meng Xianghai^{1, 2
,},
Wang Wei^{3
, ,},
Bi Sheng¹,
Li Yungang²

1.
Tangshan Polytechnic College, Tangshan 063299, Hebei, China
2.
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
3.
Department of Mechanical and Electrical Engineering, Tangshan College, Tangshan 063000, Hebei, China

摘要

摘要: 研究了FH40高强船板钢经稀土合金化处理后夹杂物诱发铁素体的变化行为，利用扫描电子显微镜（SEM）和能量衍射谱（EDS）等手段观察分析了钢中稀土夹杂物的形貌特征以及诱发形成IAF的行为机制。研究结果表明：经Ce或Ce-Zr复合处理后，稀土复合夹杂物形状得到球化，且均能诱发针状铁素体形成；单独Ce处理形成的Al-Ce-O+MnS夹杂物诱导针状铁素体行为可用贫Mn区机制和惰性基底机理解释，而Ce-Zr复合处理形成的Ce-Zr-O+MnS夹杂物诱导针状铁素体行为只能用贫锰区机制解释。
- FH40船板钢 /
- 稀土处理 /
- 夹杂物 /
- 形核机制 /
- 针状铁素体
Abstract: In this paper, the evolution behavior of ferrite induced by inclusions in FH40 ship plate steel after rare earth alloying was studied. The morphology characteristics of rare earth inclusions formed in steel and the mechanism of IAF formation were observed and analyzed by means of scanning electron microscope (SEM) and energy diffraction spectrum (EDS). The results show that the shape of the rare earth composite inclusions is spheroidized after Ce or Ce-Zr composite treatment, and both inclusions can induce the formation of IAF. Al-Ce-O+MnS inclusions formed by Ce can be explained by Mn-poor zone mechanism and inert substrate mechanism, while Ce-Zr-O+MnS inclusions formed by Ce-Zr combined treatment can only be explained by Mn-poor zone mechanism.
- FH40 ship plate steel /
- rare earth treatment /
- inclusion /
- nucleation mechanism /
- intra-granular ferrite

HTML全文

图 1 不同Ce和Zr含量的试验钢中复合夹杂物及其周围形成IAF的形貌

Figure 1. Morphology of IAF formed around composite inclusions in experimental steels with different Ce and Zr contents

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图 2 M2钢中Al-Ce-O+MnS夹杂物的线扫描结果

Figure 2. Linear scanning results of Ce-Zr-O+MnS inclusions in M2 steel

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图 3 M3钢中Ce-Zr-O+MnS夹杂物的线扫描结果

Figure 3. Linear scanning results of Ce-Zr-O+MnS inclusions in M3 steel

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表 1 试验钢实际化学成分

Table 1. Chemical compositions of experimental steels %

试样	C	Si	Mn	P	S	Ni	Nb	Ti	Al	N	Ce	Zr
M1	0.063	0.251	1.59	0.0096	0.0058	0.303	0.0395	0.0127	0.034	0.0078
M2	0.069	0.245	1.57	0.0097	0.0055	0.296	0.0401	0.0132	0.034	0.0059	0.0580
M3	0.065	0.247	1.58	0.0093	0.0056	0.298	0.0395	0.0129	0.031	0.0069	0.0576	0.0054

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表 2 夹杂物的热膨胀系数（α）值（273～1273 K）

Table 2. Thermal expansion coefficient (α) values of inclusions（273~1 273 K）

物质	热膨胀系数×10⁶	物质	热膨胀系数×10⁶
γ-Fe	20.0～23.0	Ce₂S₃	12.7
TiN	10	Ce₃S₄	12.5
SiO₂	0.5	La₂O₃	13.6
Ti₂O₃	≤10	CeO₂	13.2
MnO·Al₂O₃	8	Ce₂O₃	13.6
2 MnO·2 Al₂O₃·5 SiO₂	2.0	LaS	11.5
莫来石Al₂O₃·SiO₂	5.3	Ce₂O₂S	12.0
La₂S₃	10.4	La₂O₂S	12.0
La₃S₄	11.4	CeAlO₃	10.0
CeS	12.3	LaAlO₃	10.0

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