GB/T 9441—2021《球墨铸铁金相检验》标准解读  

Interpretation of GB/T 9441—2021“Metallographic Test Method for Spheroidal Graphite Cast Iron”

作　　者：王泽华[1] 张欣[1] 郭道成 WANG Ze-hua;ZHANG Xin;GUO Dao-cheng(College of Mechanics and Materials,Hohai University,Nanjing 211100,Jiangsu,China)

机构地区：[1]河海大学力学与材料学院,江苏南京211100

出　　处：《铸造》2023年第3期333-341,共9页Foundry

摘　　要：球墨铸铁的球化率、珠光体含量、磷共晶含量和碳化物含量是球墨铸铁的重要质量指标,针对2009版《球墨铸铁金相检验》国家标准中存在的问题,新修订了GB/T 9441—2021《球墨铸铁金相检验》标准。本文介绍新修订的GB/T 9441—2021标准的主要内容,包括标准的术语和定义、球化率计算以及球化率、珠光体、磷共晶和碳化物等显微组织的评定;对球形石墨颗粒的定义及其计算模型、球化率的定义及其计算公式的确定等进行了解读。本文总结归纳了2021版与2009版《球墨铸铁金相检验》国家标准的主要差异。The mechanical properties of spheriodal graphite cast iron have a good relationship with its microstructure.The level of nodularity and the content of pearlite,phosphor eutectic,carbide are the recognized quality indicators of the spheriodal graphite cast iron.But there are some shortages existed in GB/T 9441—2009 Metallographic Test Method for Spheroidal Graphite Cast Iron.A newly revised standard was published.The main content of the revised standard was introduced in the paper,including technical items and definitions,expression of nodularity,and the evaluating method of nodularity,and the level of pearlite,phosphor eutectic,carbide in the spheroidal graphite cast iron.The definition for the spheriodal graphite particle and its numerical model,and nodularity calculating formula was explained in detail.And the technical difference between the two versions was collected and compared with each other.

关 键 词：球墨铸铁 金相 GB/T 9441 标准化 

分 类 号：TG143.5[一般工业技术—材料科学与工程]