加热工艺对含磷高强钢氧化行为的影响  

Heating process on oxidation behavior of P-bearing high strength steel

作　　者：蒋光锐[1,2] 王海全 刘李斌[1,2,4] 

机构地区：[1]首钢技术研究院薄板所,北京100043 [2]绿色可循环钢铁流程北京市重点试验室,北京100043 [3]中国钢研科技集团先进金属材料涂镀国家工程实验室,北京100081 [4]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《钢铁》2017年第10期78-82,共5页Iron and Steel

基　　金：北京市科技计划资助项目(D15110300350000)

摘　　要：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。With excellent formability and high strength, P-bearing high strength steel is utilized to stamping parts in auto- mobile industry. Except P, several other alloying elements, such as Mn, Si, are added into the P-bearing high strength steel for solid solution strengthing. These alloying elements are prone to be selectively oxidized during annealing. A P- bearing steel was studied through a Hot-Dip Process Simulator to investigate effect of dew point during heating on oxida- tion behavior. Scanning electron microscope （SEM）, glow-discharge optical omission spectroscopy （GD-OES） and X- ray photo-electron spectroscopy （XPS） were used to illustrate micromorphology of the surface, alloying elements depth distribution profile and kinds of compound on the external surface respectively. Results show that the dew point during heating greatly impact the oxidation behavior of alloying elements on the external surface. Moreover higher dew point during heating results in suppressing selective oxidation of Mn and Si on the external surface while promoting enriching of P to the external surface. Furthermore, it indicates that the P exists in phosphates on the external surface.

关 键 词：含磷高强钢 选择性氧化 加热 露点 

分 类 号：TG161[金属学及工艺—热处理]