合理的金相试样制备方法是获得清晰、高质量显微组织图像的保障，是材料金相研究的基础。对高纯钨、高氮不锈钢、汽车钢板、涂层材料的金相制备技巧及具体方法进行了分析，解决了制样中切割、镶嵌、磨抛和浸蚀等过程遇到的问题。结果表明：高纯钨硬度高，要保证磨抛时间；高氮不锈钢采用三氯化铁盐酸甘油混合液浸蚀，可获得浸蚀均匀的显微组织形貌；汽车钢板制样时要保证试样直立，不倾斜，且要避免抛光过程产生划痕；涂层材料制样的切割、镶嵌和磨抛过程要做好防护工作，确保涂层完整。

Reasonable metallographic sample preparation method is the guarantee to obtain clear and high quality microstructure image, and is the basis of metallographic study of materials. The metallographic preparation techniques and specific methods of high purity tungsten, high nitrogen stainless steel, automobile steel plate and coating material were analyzed, and the problems encountered in the process of cutting, inlaying, grinding and polishing and etching in sample preparation were solved. The results show that the hardness of high purity tungsten is high, so grinding and polishing time should be ensured. High nitrogen stainless steel agent can obtain uniform microstructure by etching with ferric chloride and glycerin hydrochloride mixture. The sample preparation of automobile steel plate should ensure that the sample is upright and not inclined, and avoid scratches during polishing. During the cutting, inlaying and grinding and polishing process of coating material sample preparation, the protective work should be done to ensure the integrity of coating.