一、現場金相檢驗的意义和应用金相檢驗是对金屬材料全面鉴定不可缺少的一种檢驗,它的主要任务是:鉴定金屬材料的組織結构,杂质的形状,数量和分布特征;結晶粒度粗細;焊接质量;热处理效果;表面脫碳和受介质腐蝕情况及其严重程度等。在实际生产中,往往有这样的情况,某設备零件需要做金相檢驗,但是不能取試料,例如:化工厂的大型压縮机部件,尤其是高压容器的定期檢验工作,按上級指示的有关規定,必須做金相檢驗来 First, the significance and application of on-site metallographic examination Metallographic examination is an indispensable test for the comprehensive identification of metallic materials. Its main tasks are: to identify the organizational structure of metallic materials, the shape, quantity and distribution of impurities; the grain size Thickness, welding quality, heat treatment effect, surface decarburization and medium corrosion and its severity. In actual production, there are often such cases, parts of a certain equipment need to do metallographic examination, but can not take samples, such as: large-scale chemical plant compressor components, especially the regular inspection of high pressure vessels, according to the instructions The relevant provisions of the metallographic examination must be done