通过萃取复型观察和对衍射花样的标定，研究了深层渗碳过程中析出碳化物的形态和分布，实验结果表明：渗碳过程中析出的形态较好的碳化物，象点状、球状和椭球状碳化物均为钼的碳化物；而形态较差的针状、网状则为（Ｃｒ、Ｆｅ）７Ｃ３和（Ｆｅ，Ｍ）３Ｃ。并对其形成机理进行了初步探讨 The morphology and distribution of precipitated carbides in deep carburizing process were studied by the observation of complex patterns and the calibration of diffraction patterns. The experimental results show that the carbides precipitated in the process of carburizing, like dot, sphere and The ellipsoidal carbides are carbides of molybdenum, while the less acicular and meshed carbides are (Cr, Fe) 7C3 and (Fe, M) 3C. And its formation mechanism was discussed