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Effect of Controlled Cooling After Hot Rolling on Microstructure and Properties of Non-quenched and Tempered Steel F45MnVS
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Baizhan LIANG1, Gang ZHAO2, Hao XU2, Yue ZHAO3
Mining and Metallurgical Engineering | 2023, 43(3) : 176 - 179
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Mining and Metallurgical Engineering | 2023, 43(3): 176-179
• MATERIALS •
Effect of Controlled Cooling After Hot Rolling on Microstructure and Properties of Non-quenched and Tempered Steel F45MnVS
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Baizhan LIANG1, Gang ZHAO2, Hao XU2, Yue ZHAO3
Affiliations
  • 1.Technology Center of Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002, Jiangsu, China
  • 2.Examination Center of Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002, Jiangsu, China
  • 3.Steel Mill of Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002, Jiangsu, China
Published: 2023-06-01 doi: 10.3969/j.issn.0253-6099.2023.03.039
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An experiment on non-quenched and tempered steel F45MnVS was carried out by adopting controlled cooling after hot rolling. The mechanical properties, decarburized layer and microstructure of rolled steel without cooling and after controlled cooling process were compared for analysis. The results show that controlled cooling after hot rolling can lead to the steel with yield strength, elongation, section shrinkage and impact energy improved all, and with the decarburized layer being effectively controlled or even "disappeared". With the surface temperature of the hot-rolled steel decreased to 650 ℃, granular bainite begins to occur on the steel surface; with the surface temperature down to 460 ℃, much granular bainite occurs on the steel surface. It is shown that by using controlled cooling after hot rolling, the ferrite and pearlite on the steel surface and near 1/2 radius on the cross section of the steel become fine-grained. The total ferrite net is reduced, and long strip ferrite is transformed to blocky ferrite. Due to larger size, the central part of steel shows little difference in the microstructure.

controlled cooling technology  /  hot rolling  /  non-quenched and tempered steel  /  F45MnVS  /  microstructure  /  mechanical properties
Baizhan LIANG, Gang ZHAO, Hao XU, Yue ZHAO. Effect of Controlled Cooling After Hot Rolling on Microstructure and Properties of Non-quenched and Tempered Steel F45MnVS[J]. Mining and Metallurgical Engineering, 2023 , 43 (3) : 176 -179 . DOI: 10.3969/j.issn.0253-6099.2023.03.039
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doi: 10.3969/j.issn.0253-6099.2023.03.039
  • Receive Date：2022-12-13
  • Online Date：2026-03-05
  • Published：2023-06-01
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  • Received：2022-12-13
Affiliations
    1.Technology Center of Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002, Jiangsu, China
    2.Examination Center of Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002, Jiangsu, China
    3.Steel Mill of Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002, Jiangsu, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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