钢中夹杂物的显微测定 1983年12月

[中文适用范围]： 这种用于评估钢中夹杂物含量的推荐微观实践已被开发为定量确定钢清洁度的实用方法。该方法已被建立为钢厂操作和生产制造验收的合理控制。它已被广泛接受用于碳钢和合金钢棒材@钢坯@和板坯。例外情况是超出这些显微照片限制的再硫化钢种和通常使用 ASTM E 45-60T@ 方法 A@ Jernkontoret 图分类的高碳轴承优质钢种 [外文原描述]： This recommended microscopic practice for evaluating the inclusion content in steel has been developed as a practical method of quantitatively determining the degree of cleanliness of steel. This method has been established as a reasonable control for steel mill operations and acceptance for production manufacturing. It has been widely accepted for carbon and alloy steel bars, billets, and slabs. Exceptions are resulfurized grades which are outside the limits of these photomicrographs and the high carbon bearing quality steels which are generally classified using ASTM E 45-60T, Method A, Jernkontoret Charts.Cross Reference: ASTME45-60T