【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1 800 MPa热成形钢的氧化行为。结果表明：实验钢外氧化层主要由Fe₃O₄、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。更多还原

【Abstract】 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 1 800 MPa 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 Fe₃O₄, 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 2.5 μm to 5 μm; 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.更多还原