细小的铅粒在含铅钢基体中分布的均匀程度,直接关系到刀具的使用寿命、产品外观和内在质量的好坏。因此采用金相法对含铅钢材进行观察分析是十分重要的。经过反复实践我们试验出一套着色分析方法。浸蚀剂配方在100毫升酒精碘化钾饱和溶液中加入10～12毫升甘油和1毫升硝酸,经充分搅拌,待溶液呈红色过滤后使用。 Small lead in lead-based steel matrix distribution of the degree of uniformity is directly related to the life of the tool, the appearance of the product and the inherent quality of good or bad. Therefore, the use of metallographic analysis of lead steel is very important. After repeated practice we tested a set of shading analysis methods. Etch formula 100 ml of alcohol saturated solution of potassium iodide by adding 10 ~ 12 ml of glycerol and 1 ml of nitric acid, stir, until the solution was red filtered before use.