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钢铁经氮化后的渗层组织,一般采用化学侵蚀法显示。文献[1]所推荐的几种侵蚀剂已在实际应用中取得较好的效果。但实践表明,使用化学侵蚀法仍有许多不足之处,如试剂通用性较窄,有的试剂只适用于少数钢种,甚至同一材料经不同工艺处理后得到的氮化组织,也需用不同的侵蚀剂或侵蚀规范才能鉴别;而有些试剂的显示结果重演性较差,操作规范不易掌握;还有个别试剂,如硒酸盐酸酒精溶液的侵蚀效果
After nitriding steel nitrided tissue, the general use of chemical etching method. Several etchants recommended by the literature [1] have achieved good results in practical applications. However, practice shows that there are still many shortcomings in the use of chemical etching. For example, the generality of the reagents is rather narrow. Some reagents are only suitable for a few types of steel. Even nitrided microstructures obtained by different processes of the same material need to be different Of the erosions or erosion norms to identify; and some reagents showed poor reproducibility, norms of operation is not easy to grasp; there are individual agents, such as the selenium acid alcohol solution erosion effect