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Cause Analysis on Peeling and Cracking of High Strength Beam Steel during Bending
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Zhi-gang Zhang1, Xue-gang Zhou2, Bing-jing Chen1, Peng Li1, Na Zhang1, Meng-ni Hou3
Science & Technology of Baotou Steel | 2024, 50(3) : 53 - 56
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Science & Technology of Baotou Steel | 2024, 50(3): 53-56
• Variety Quality and Experimental Study •
Cause Analysis on Peeling and Cracking of High Strength Beam Steel during Bending
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Zhi-gang Zhang1, Xue-gang Zhou2, Bing-jing Chen1, Peng Li1, Na Zhang1, Meng-ni Hou3
Affiliations
  • 1. Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2. Plate Plant of Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 3. Chemical Inspection Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
Published: 2024-06-25
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The cracked part is analyzed with metallographic microscope and scanning electron microscope aiming at the peeling and cracking of hot rolled high strength beam steel plate during the process of bending. The results showed that many continuous punctiform or banded inclusions containing O, Al and Ti elements were distributed close to the surface layer at cracking; metallographic microstructure of decarburized layer on surface layer of steel plate was coarse equiaxed ferrite. The analysis suggests that hard inclusions, TiO2 and Al2O3 destroy the continuity of product matrix and plasticity of surface layer is reduced by microstructures of oxidation and decarbonization, the matrix with inclusions fractures firstly in bending process, which makes the deformation of upper surface layer increase and it is out of tolerance range so that peeling and cracking are formed. The problem of lamellar cracking during bending for steel plate is solved by adopting the technology of pre-blowing argon in tundish to prevent oxide inclusion caused by secondary oxidation of molten steel at the initial stage of pouring.

high strength beam steel  /  peeling and cracking  /  inclusions  /  secondary oxidation
Zhi-gang Zhang, Xue-gang Zhou, Bing-jing Chen, Peng Li, Na Zhang, Meng-ni Hou. Cause Analysis on Peeling and Cracking of High Strength Beam Steel during Bending[J]. Science & Technology of Baotou Steel, 2024 , 50 (3) : 53 -56 .
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Year 2024 volume 50 Issue 3
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  • Receive Date：2024-04-13
  • Online Date：2025-10-24
  • Published：2024-06-25
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  • Received：2024-04-13
Affiliations
    1. Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    2. Plate Plant of Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    3. Chemical Inspection Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
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Citations
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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