横纵轧对低合金高强度钢夹杂物变形行为和低温韧性的影响

doi:10.11896/cldb.23020218

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Abstract The quantity, size and shape of inclusions in the process of thermal deformation were controlled by two different rolling processes:longitudinal rolling and cross rolling. OM was used to analyze the microstructure and grain size under different rolling processes. The results show that unidirectional rolling and cross rolling have no obvious effect on the microstructure and grain size under the same amount of deformation. The mechanical properties test results show that the steel plates rolled by the two processes have the same strength. The impact properties of cross rolled steel plates are lower than that of unidirectional rolled steel plates, but the transverse and longitudinal differences are smaller, and this phenomemon is more obvious at -80 ℃. OM, SEM were used to compare and analyze the differences of inclusions in different sections. The results show that MnS inclusion is the biggest difference between the two processes. In cross rolled steel plate, MnS deform in rolling direction and transverse direction, and the size distribution is close in longitudinal section and cross section, which is beneficial to reduce anisotropy. The maximum length of MnS does not decrease, and the number of large size MnS does not decrease, so the impact energy of steel at -80 ℃ is relatively lower.

Key words： inclusion cross rolling low temperature toughness anisotropy deformation behavior

Published: 10 September 2024 Online: 2024-09-30

CLC number:

TG335.1

Fund:National Natural Science Foundation of China (U2141207)and HBIS Group Co., Ltd.

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	Articles by authors
	FU Lu
	ZHAO Yan
	REN Shuai
	SUN Zhiyan
	ZHAO Yingli
	ZHANG Zhongwu

Cite this article:

FU Lu,ZHAO Yan,REN Shuai, et al. Effect of Cross Rolling on Deformation Behavior of Inclusions and Low Temperature Toughness in High Strength Low Alloy Steel[J]. Materials Reports, 2024, 38(17): 23020218-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.23020218 OR http://www.mater-rep.com/EN/Y2024/V38/I17/23020218

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