一、前言 38CrMoAlA钢,氮化试样经硝酸酒精溶液腐蚀后,在扩散层处常常出现波纹状的白色化合物,通常称它为脉状组织。这种组织使钢的疲劳强度,耐磨性和耐腐蚀性下降。为了探讨它的形成原因,控制脉状组织的产生,曾有人对化合物层进行过分析,认为渗层由ε相、γ′,相组成,但对扩散层分析的报导很少。文献[2]认为脉状组织主 First, the preface 38CrMoAlA steel, nitrided sample corrosion by nitric acid alcohol solution, the corrugated white compound often appears in the diffusion layer, usually referred to as vein tissue. This organization reduces the fatigue strength, wear resistance and corrosion resistance of the steel. In order to investigate the reason for its formation and to control the generation of vein tissue, compound layers have been analyzed. It is believed that the diffusion layer consists of ε phase, γ ’phase, but few reports on diffusion layer analysis. Literature [2] that the main vein tissue