Effect of Cross Rolling on Deformation Behavior of Inclusions and Low Temperature Toughness in High Strength Low Alloy Steel
FU Lu1,2, ZHAO Yan1,2, REN Shuai2, SUN Zhiyan2, ZHAO Yingli2, ZHANG Zhongwu3,*
1 Yantai Research Institute and Graduate School, Harbin Engineering University, Yantai 264000, Shandong, China 2 HBIS Materials Technology Research Institute, HBIS Group, Shijiazhuang 050000, China 3 School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
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.
付璐, 赵晏, 任帅, 孙智妍, 赵英利, 张中武. 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[J]. 材料导报, 2024, 38(17): 23020218-6.
FU Lu, ZHAO Yan, REN Shuai, SUN Zhiyan, ZHAO Yingli, ZHANG Zhongwu. Effect of Cross Rolling on Deformation Behavior of Inclusions and Low Temperature Toughness in High Strength Low Alloy Steel. Materials Reports, 2024, 38(17): 23020218-6.
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2024, Vol. 38 
