一、前言定量研究钢中稀土夹杂的数量、大小、分布以及MnS变态,对提高钢材质量是非常重要的。过去对钢中形成的非金属夹杂物的数量有以下表示方法: 1.简单地以数量多少的文字叙述法; 2.按标准等级图的比较法; 3.以计算夹杂物数量、尺寸、面积的定量法。后一种方法虽然可得出定量数据,但实际应用中很不方便。图像分析仪虽方便了钢中非金属夹杂物 I. Preface Quantitative study of rare earth inclusions in steel volume, size, distribution and MnS metamorphism, to improve the quality of steel is very important. In the past, the number of non-metallic inclusions formed in steel was expressed as follows: 1. A simple description of how many words were written; 2. A comparison method according to a standard hierarchical graph; 3. A method of calculating the number, size, area Quantitative method. Although the latter method can produce quantitative data, it is very inconvenient in practical application. Although the image analyzer to facilitate the non-metallic inclusions in steel