论文部分内容阅读
含磷高强钢具有良好的成形性能和较高的强度,被广泛用于汽车零件冲压成形。除了磷元素,含磷高强钢中通常还含有锰、硅等合金元素进行固溶强化,这些合金元素在退火过程中容易发生选择性氧化。采用镀锌模拟器研究了加热过程的露点温度对含磷高强钢在加热过程中的氧化行为。采用扫描电镜、辉光放电光谱仪以及光电子能谱仪分别分析了含磷高强钢的表面微观形貌、元素深度分布以及表面化合物种类。结果表明,加热过程的露点温度对合金元素在表面的氧化行为有显著影响,较高的加热过程露点温度可以显著抑制锰元素和硅元素在表面的选择性氧化行为,但是会加速磷元素在表面的偏析。进一步研究表明,磷元素在样品表面以磷酸盐形式存在。
Phosphorus-containing high-strength steel has good formability and high strength, is widely used in automotive parts stamping. In addition to phosphorus, phosphorus-containing high-strength steel usually contains manganese, silicon and other alloying elements for solid solution strengthening, these alloying elements prone to selective oxidation during the annealing process. Galvanic simulator was used to study the oxidation behavior of high strength steel with phosphorus during the heating process. The surface morphology, element depth distribution and surface compounds of phosphorus-containing high strength steel were analyzed by scanning electron microscopy, glow discharge spectroscopy and photoelectron spectroscopy. The results show that the dew-point temperature has a significant effect on the oxidation behavior of alloying elements on the surface. The higher dew-point temperature during the heating process can significantly inhibit the selective oxidation of manganese and silicon on the surface, but accelerates the deposition of phosphorus on the surface Segregation. Further studies have shown that the phosphorus element in the sample surface as phosphate form.