不同卷取温度下1800MPa热成形钢氧化行为研究  

Study on oxidation behavior of 1800MPa hot-stamping steel strip at different coiling temperatures

作　　者：李彦芳 王超 武会宾 宫泽 陈波 吕嘉琪 LI Yanfang;WANG Chao;WU Huibin;GONG Ze;CHEN Bo;LÜJiaqi(College of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]北京科技大学钢铁共性技术协同创新中心,北京100083

出　　处：《轧钢》2025年第1期21-28,共8页Steel Rolling

基　　金：辽宁省钢铁产业产学研创新联盟项目(BG-BYGT-TE23-000020-0);辽宁科技大学大学生创新创业训练计划项目(202410146013)。

摘　　要：汽车轻量化是实现节能降碳的重要手段,具有强度高、质量轻、抗疲劳性能好等优点的热成形钢在汽车制造领域得到广泛应用,但在轧制过程中难以稳定控制其氧化铁皮。为进一步提高热成形钢的表面质量,利用SEM、EDS、LM光谱分析及热模拟试验等方法,研究了不同卷取温度及环境气氛下1800MPa热成形钢的氧化行为。结果表明:实验钢外氧化层主要由Fe_(3)O_(4)、FeO及Fe-Si尖晶石层组成;当卷取温度小于550℃时,无论在空气或氩气环境气氛条件下,实验钢均未发现内氧化层;随着卷取温度的升高,实验钢基体界面处出现点状内氧化,当环境气氛为空气时,内氧化层厚度由2.5μm增加到5μm;当环境气氛为氩气时,内氧化层厚度大于相同卷取温度下空气气氛条件时内氧化层厚度;当冷却速度为1.5℃/min时,随着卷取温度升高,内氧化呈现加重的趋势。Automobile lightweight is an important means to achieve energy saving and carbon reduction.Hot-stamping steel with the advantages of high strength,light weight and high fatigue resistance is widely used in the automotive field.However,it is difficult to control the oxide scale stably during the rolling process of hot-stamping steel.In order to further improve the surface quality of hot-stamping,the oxidation behavior of 1800MPa hot-stamping steel under different coiling temperatures and environmental atmospheres was studied by means of SEM,EDS,LM spectrometer and thermal simulation testing machine.The results show that the outer oxide layer of experimental steel is mainly composed of Fe_(3)O_(4),FeO and Fe-Si spinel layer;When the coiling temperature is less than 550℃,no internal oxide layer is found in the experimental steel under air or ambient environmental atmosphere conditions;As the coiling temperature increases,point-like internal oxidation occurs at the interface of the experimental steel matrix.When the ambient atmosphere is air,the thickness of the inner oxide layer increases from 2.5μm to 5μm;when the ambient atmosphere is argon,the thickness of the inner oxide layer is greater than that of the air atmosphere.When the cooling rate is 1.5℃/min,as the coiling temperature increases,the internal oxidation shows a tendency to increase.

关 键 词：1800MPa热成形钢 表面质量 卷取温度 氧化行为 内氧化 外氧化 汽车轻量化 

分 类 号：TG142.1[一般工业技术—材料科学与工程]