Si含量对10CrNiCuSi钢氧化铁皮的影响

doi:10.11896/cldb.22040261

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Abstract In order to improve the surface quality of 10CrNiCuSi shipbuilding steel, the experimental steel with Si content ranging from 0.08% to 0.65% was designed. The high-temperature oxidation behavior of the steel at 1 150—1 250 ℃ was studied and the strippability of the oxide scales was evaluated by bend tests. The influence of Si content on Si-riched reaction products and oxidizing weight was discussed and analyzed. The results show that when the oxidizing temperature is lower than Fe₂SiO₄-FeO eutectic temperature, the oxidizing weight drops down with the increase of Si content, which leads to the formation of more Fe₂SiO₄ solid phase, acting to inhibit the oxidation reaction. When the oxidizing temperature is higher than Fe₂SiO₄-FeO eutectic temperature, the oxidizing weight increases with the increase of Si content at the range of 0.20%—0.65%, owing to the Si-rich liquid phase accelerating the oxidation reaction. The liquefaction phenomenon of Si-rich products has an important influence on the strippability of the oxide scales. The liquified Si-rich phase is immersed into the substrate and FeO, forming an anchor-like or grid-like morphology, which seriously deteriorates the flatness of the interface between the internal oxide layer and the substrate, making it difficult for the scales to exfoliate from the substrate. The increase of Si content and consequent liquefied phase worsens the strippability of the scales from the substrate. The experimental results show that temperature and Si content are significant factors to improve the surface quality of 10CrNiCuSi steel and it is recommended that the Si content should be controlled not higher than 0.20%, and the heating temperature should be not higher than 1 150 ℃.

Key words： 10CrNiCuSi steel Si content Fe₂SiO₄-FeO liquefied phase strippability

Published: 10 October 2023 Online: 2023-09-28

CLC number:

TG156.1

Fund:Shandong Province Key Research and Development Project (2020CXGC01305).

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	Articles by authors
	PAN Tao
	ZHAO Lei
	CHAI Xiyang
	LUO Xiaobing
	CHAI Feng
	YANG Caifu

Cite this article:

PAN Tao,ZHAO Lei,CHAI Xiyang, et al. Effect of Silicon Content on the Oxide Scale of 10CrNiCuSi Steel[J]. Materials Reports, 2023, 37(19): 22040261-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22040261 OR http://www.mater-rep.com/EN/Y2023/V37/I19/22040261

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