论文部分内容阅读
一、前言管道的石墨化程度,除采用化学分析和机械性能测试方法来评定外,金相分析也是一种评定方法。英国和苏联已分别制订低碳钢和含0.50%钼钢石墨化的金相评级标准图。苏联还可以找出石墨化的金相级别与机械性能之间的对应关系。但是,由于金相分析方法简单、直观,电厂的金属监督工作者常采用这一方法。在做金相检查时,试样中石墨含量要与金相评级标准图谱相对照,以确定管道石墨化的
First, the preface The degree of graphitization of the pipeline, in addition to the use of chemical analysis and mechanical properties testing methods to assess, the metallographic analysis is also a method of assessment. The United Kingdom and the Soviet Union have separately formulated metallographic grading charts for low carbon steels and 0.50% molybdenum steels. The Soviet Union can also find the correspondence between the graphitized metallurgical grade and the mechanical properties. However, due to the simple and intuitive method of metallographic analysis, this method is often used by metal supervision workers in power plants. In doing metallographic examination, the graphite content of the sample to be compared with the metallographic grading standard map to determine the graphitization of the pipe