40Cr钢的非金属夹杂物

a)     500×                                                                                       b) Ca        500×

c) Al                  500×                                                                       d)             500×

e)                                                         f)                                                               g)

钢种：40Cr

状态：大钢锭上注法浇注，外来复合夹杂，主要成分是Al₂O₃氧化物、(CaO)_n·(Al₂O₃)_m铝酸盐、MnO·Al₂O₃锰尖晶石

a)                1350×                                                       b)               1350×

c)        1350×                                                                     d)      1350×

                            e）              1350×                                                                  X射线能谱图                  

图   Si,Cr,Mn,Fe元素X射线面分布图及X射线能谱图

钢种：40Cr

状态：钢坯纵向裂纹断口上发现的弥散分布的含SiO₂的锰铁铬尖晶石(Mn,Fe)O·Cr₂O₃ X射线能谱定量分析结果氧化物质量分数（%）