Q355B冷轧镀锌板弯折开裂成因分析

王圆永; 许迎春; 高光勇; 蒋月月; 戴庆伟

doi:10.3969/j.issn.1674-6457.2025.10.009

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精密成形工程 ›› 2025, Vol. 17 ›› Issue (10) : 95-102. DOI: 10.3969/j.issn.1674-6457.2025.10.009

钢铁成形

Q355B冷轧镀锌板弯折开裂成因分析

王圆永^1,2, 许迎春², 高光勇¹, 蒋月月^1,2,*, 戴庆伟^2,*

作者信息 +

Factors of Cracking in Q355B Cold-rolled Galvanized Steel Sheets During Bending

WANG Yuanyong^1,2, XU Yingchun², GAO Guangyong¹, JIANG Yueyue^1,2,*, DAI Qingwei^2,*

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文章历史 +

摘要

目的探究Q355B在成形过程中常出现弯折开裂现象的原因。方法以Q355B冷轧镀锌板为研究对象,通过显微组织观察、能谱仪（EDS）分析以及维氏显微硬度测试等宏观与微观表征手段,分析比对了开裂样品与正常样品的微观组织、夹杂物分布、化学成分及硬度特性。结果开裂样品在轧制方向上呈现出更明显的带状组织,且在开裂样品与正常样品表面均观察到数量相似且呈长条状分布的夹杂物,观察开裂样品断口,发现其断口处存在大尺寸夹杂物。EDS分析结果表明,开裂样品与正常样品表面长条状夹杂物为MnS,开裂样品断口处存在的大尺寸夹杂物为Al₂O₃,且开裂样品在宏观表面和微观组织中均表现出较为明显的铜元素（Cu）偏析现象。此外,维氏显微硬度测试结果表明,开裂样品的整体硬度较高于正常样品的整体硬度。结论带状组织与大尺寸夹杂物是导致Q355B弯折开裂的原因,而Cu在宏观表面及微观组织中的显著偏析则是加剧材料开裂倾向的关键因素。

Abstract

The work aims to investigate the factors of frequent bending cracking in Q355B during the forming process. With Q355B cold-rolled galvanized sheets as the research object, macroscopic and microscopic characterization techniques, including microstructure observation, energy-dispersive spectroscopy (EDS) analysis, and Vickers microhardness testing, were employed to compare and analyze the microstructure, inclusion distribution, chemical composition, and hardness properties of cracked samples and normal samples. The results revealed that the cracked samples exhibited more pronounced banded structures in the rolling direction. Both cracked and normal samples showed similar quantities of elongated inclusions on their surfaces, with EDS analysis confirming these inclusions as MnS. Observation of the fracture surfaces of the cracked samples identified the presence of large-sized Al₂O₃ inclusions. Additionally, significant copper (Cu) segregation was observed on both the macroscopic surfaces and microscopic structures of the cracked samples. Vickers microhardness testing indicated that the overall hardness of the cracked samples was higher than that of the normal samples. In conclusion, banded structure and large-sized inclusions are among the causes of bending cracking in Q355B steel. Furthermore, the significant segregation of Cu on the macroscopic surface and within the microstructure is identified as a key factor that exacerbates the material's tendency to crack.

导出引用

王圆永, 许迎春, 高光勇, 蒋月月, 戴庆伟. Q355B冷轧镀锌板弯折开裂成因分析[J]. 精密成形工程. 2025, 17(10): 95-102 https://doi.org/10.3969/j.issn.1674-6457.2025.10.009

WANG Yuanyong, XU Yingchun, GAO Guangyong, JIANG Yueyue, DAI Qingwei. Factors of Cracking in Q355B Cold-rolled Galvanized Steel Sheets During Bending[J]. Journal of Netshape Forming Engineering. 2025, 17(10): 95-102 https://doi.org/10.3969/j.issn.1674-6457.2025.10.009

中图分类号： TG335.12 TG115

参考文献

[1] 孙雪娇, 方金林, 董丙成. Q355B宽带钢表面开裂原因[J]. 理化检验-物理分册, 2024, 60(5): 54-56.
SUN X J, FANG J L, DONG B C.Reason for Surface Cracking of Q355B Broadband Steel[J]. Physical Testing and Chemical Analysis (Part A (Physical Testing)), 2024, 60(5): 54-56.
[2] 罗忠河. 我国铁路车辆用钢提档升级步伐加快[N]. 中国冶金报, 2024-08-30(20).
LUO Z H. Accelerated Upgrading of Steel for Railway Vehicles in China[N]. China Metallurgical News, 2024-08-30(20).
[3] 田仲良, 王利峰, 孙学玉. 热轧Q355B带钢组织及性能稳定生产实践[J]. 山西冶金, 2024, 47(3): 146-147.
TIAN Z L, WANG L F, SUN X Y.Production Practice of Stable Microstructure and Properties of Hot Rolled Q355B Strip Steel[J]. Shanxi Metallurgy, 2024, 47(3): 146-147.
[4] 郭鹏. Q355B钢厚板表面裂纹原因分析及改进措施[J]. 新疆钢铁, 2024(1): 80-82.
GUO P.Cause Analysis and Improvement Measures of Surface Crack of Q355B Steel Thick Plate[J]. Xinjiang Iron and Steel, 2024(1): 80-82.
[5] 赵启帆, 向浪涛, 王灿, 等. 热卷Q355B低合金钢表面裂纹研究与应用[C]// 第十四届中国钢铁年会论文集. 重庆, 2023: 90-94.
ZHAO Q F, XIANG L T, WANG C, et al.Research and Application of Surface Cracks in Hot-Rolled Q355B Low-Alloy Steel[C]// The Chinese Society for Metals. Proceedings of the 14th China Iron and Steel Annual Conference, Chongqing, Deep Processing of Metallic Materials, Chongqing Iron and Steel Co., Ltd., 2023: 90-94.
[6] 陈富强, 郭云侠, 张宁飞, 等. 板厚和组织对Q355B热轧板冷弯变形加工开裂的影响[J]. 安徽工业大学学报(自然科学版), 2023, 40(4): 357-363.
CHEN F Q, GUO Y X, ZHANG N F, et al.Effect of Plate Thickness and Microstructure on Cracking of Q355B Hot-Rolled Steel Plate during Cold Bending Deformation Processing[J]. Journal of Anhui University of Technology (Natural Science), 2023, 40(4): 357-363.
[7] 刘珊珊, 孙乾, 徐瑞亮, 等. 低合金钢弯折开裂的分析与经济性改善[J]. 山东冶金, 2023, 45(6): 8-12.
LIU S S, SUN Q, XU R L, et al.Analysis and Economic Improvement of Bending Cracking of Low Alloy Steel Strip[J]. Shandong Metallurgy, 2023, 45(6): 8-12.
[8] 孙乾. 低合金热轧钢带冷弯开裂的分析与改进[J]. 山西冶金, 2023, 46(4): 38-41.
SUN Q.Analysis and Improvement of Cold Bending Cracking of Low Alloy Hot Rolled Steel Strip[J]. Shanxi Metallurgy, 2023, 46(4): 38-41.
[9] 李秋平, 朱立光, 孙荣志, 等. 普碳钢弯折开裂特征及成因分析[J]. 热加工工艺, 2022, 51(11): 159-162.
LI Q P, ZHU L G, SUN R Z, et al.Characteristics and Cause Analysis of Bending Cracking of Common Carbon Steel[J]. Hot Working Technology, 2022, 51(11): 159-162.
[10] ZHANG X F, ZHI J G, SONG X W, et al.Influence of Cerium on Impact Toughness, Tensile Properties and Inclusion of Industrial Al-Killed Steel Q355B[J]. Journal of Materials Research and Technology, 2024, 32: 1118-1126.
[11] SI Q, DING Y, ZONG L, et al.Effect of Pre-Fatigue Damage on Static and Hysteretic Behavior of Q355 Steel[J]. International Journal of Fatigue, 2022, 160: 106874.
[12] 周耀. 微观组织调控对汽车用先进高强钢氢脆性能的影响[D]. 北京: 北京科技大学, 2024: 5-10.
ZHOU Y.Influence of Microstructure Control on Hydrogen Embrittlement Properties of Advanced High-Strength Steel for Automotive Use[D]. Beijing: University of Science and Technology Beijing, 2024: 5-10.
[13] 薛仁杰, 董伊康, 马子洋, 等. 带状组织对冷轧双相钢DP780力学性能的影响[J]. 金属热处理, 2024, 49(12): 191-197.
XUE R J, DONG Y K, MA Z Y, et al.Effect of Banded Structure on Mechanical Properties of Cold-Rolled Dual Phase Steel DP780[J]. Heat Treatment of Metals, 2024, 49(12): 191-197.
[14] 白韶斌, 盛剑, 李大赵, 等. 退火-回火和回火-退火工艺对冷轧10Mn钢显微组织及力学性能的影响[J]. 精密成形工程, 2024, 16(11): 82-90.
BAI S B, SHENG J, LI D Z, et al.Effects of Annealing-Tempering and Tempering-Annealing Processes on Microstructure and Mechanical Properties of Cold-Rolled 10Mn Steel[J]. Journal of Netshape Forming Engineering, 2024, 16(11): 82-90.
[15] YANG J F, QU K, YANG J L.Fatigue Performance of Q355B Steel Substrate Treated by Grit Blasting with and without Subsequent Cold Spraying with Al and Cu[J]. Surface and Coatings Technology, 2021, 405: 126662.
[16] 韩宇龙, 李健, 郭丽雅, 等. 螺纹钢中MnS夹杂物诱发的局部腐蚀行为[J]. 中国腐蚀与防护学报, 2024, 44(5): 1255-1262.
HAN Y L, LI J, GUO L Y, et al.Localized Corrosion Behavior Induced by MnS Inclusions in HRB400E Rebar Steel[J]. Journal of Chinese Society for Corrosion and Protection, 2024, 44(5): 1255-1262.
[17] 巴文月. 轨道钢连铸凝固过程中溶质元素微观偏析规律数值模拟研究[D]. 秦皇岛: 燕山大学, 2024: 5-10.
BA W Y.Numerical Simulation Study on the Microsegregation Law of Solute Elements in the Solidification Process of Continuous Casting of Rail Steel[D]. Qinhuangdao: Yanshan University, 2024: 5-10.
[18] MILLER M K, SIMS C E, LI J, et al.Atom Probe Tomography Study of Cu Precipitation in a High-Strength Low-Alloy Steel[J]. Metallurgical and Materials Transactions A, 2002, 33(8): 2411-2421.
[19] 宋坤. 钢材热加工过程中晶界富铜相生成与控制研究[D]. 贵阳: 贵州大学, 2015: 5-10.
SONG K.Formation and Control of Copper-Rich Phases at Grain Boundaries During Hot Processing of Steel[D]. Guiyang: Guizhou University, 2015: 5-10.
[20] MA J, SONG Y Y, JIANG H C, et al.Effect of Cu on the Microstructure and Mechanical Properties of a Low-Carbon Martensitic Stainless Steel[J]. Materials, 2022, 15(24): 8849.
[21] 李岩, 宋波, 毛璟红, 等. 残余元素铜在中碳钢中的析出规律[J]. 世界科技研究与发展, 2009, 31(4): 581-582.
LI Y, SONG B, MAO J H, et al.Copper Precipitation Behavior in Medium Carbon Steel[J]. World Sci-Tech R$D, 2009, 31(4): 581-582.
[22] 国家市场监督管理总局, 国家标准化管理委员会. 钢的游离渗碳体、珠光体和魏氏组织的评定方法: GB/T 13299—2022[S]. 北京: 中国标准出版社, 2022.
State Administration for Market Regulation, Standardization Administration of the People’s Republic of China. Determination of Free Cementite, Pearlite and Widmanstaten Structure in Steel: GB/T 13299—2022[S]. Beijing: Standards Press of China, 2022.
[23] 李明, 康学勤. 显微组织对Q355B钢板不同方向力学性能的影响[J]. 热加工工艺, 2024, 53(2): 149-154.
LI M, KANG X Q.Effect of Microstructure on Mechanical Properties of Q355B Steel Plate in Different Directions[J]. Hot Working Technology, 2024, 53(2): 149-154.
[24] 张平, 官跃辉, 金涛, 等. GCr15轴承钢盘条碳化物带状组织的控制[J]. 特钢技术, 2024, 30(2): 26-29.
ZHANG P, GUAN Y H, JIN T, et al.Control of GCr15 Bearing Steel Wire Rod Carbide Banded Structure[J]. Special Steel Technology, 2024, 30(2): 26-29.
[25] LIAN X T, CHEN L, FAN Z W, et al.Effects of Modified Inclusions and Precipitates Alloyed by Rare Earth Element on Corrosion and Impact Properties in Low Alloy Steel[J]. Acta Metallurgica Sinica (English Letters), 2022, 35(10): 1719-1730.
[26] 王鹏, 李长荣, 刘然, 等. 稀土Ce对钢中铜元素偏析的影响[J]. 材料热处理学报, 2018, 39(8): 63-67.
WANG P, LI C R, LIU R, et al.Effect of Rare Earth Ce on Segregation of Copper Element in Steel[J]. Transactions of Materials and Heat Treatment, 2018, 39(8): 63-67.
[27] 李闯, 王学敏, 尚成嘉, 等. 组织对含铜钢中析出行为的影响[J]. 材料科学与工艺, 2011, 19(4): 6-10.
LI C, WANG X M, SHANG C J, et al.Influence of Microstructure on Precipitation of Steel Bearing Copper[J]. Materials Science and Technology, 2011, 19(4): 6-10.