氮化层深度当采用显微镜法测量时应测至与基体组织有明显的交界处。氮化层的显示能否清晰可辨,主要取决于氮化层与心部组织衬度的大小,即明暗差是否分明。用通常的腐蚀法,对一般试样均显示不出明显的分界。我厂从1968年开始摸索应用腐蚀抛光法来显示氮化层的深度,在检查38CrMoAlA等氮化钢上收到了良好效果。实践证明对用腐蚀法显示不清 The depth of the nitrided layer should be measured to a significant junction with the matrix when measured microscopically. Nitride layer can be clearly displayed, mainly depends on the size of the nitride layer and heart tissue contrast, that is, whether the difference between light and dark. With the usual corrosion method, the average sample showed no obvious boundaries. I plant from 1968 began to explore the application of corrosion polishing method to show the depth of nitride layer, 38CrMoAlA and other nitrided steel inspection received good results. Practice shows that the use of corrosion method shows unclear