前言脆性断裂是一种断裂前几乎不产生显著塑性变形的断裂。它没有先期征兆,往往会突然发生,造成严重后果。因此,无论钢件或铁件都应加以重视,要预防脆断。本文介绍如何应用电子显微镜观察断口,寻找断裂原因,分析影响因素以及怎样预防脆断的一些 Introduction Fragile fracture is a fracture that produces little or no significant plastic deformation before fracture. It has no prior indications and often happens suddenly, with serious consequences. Therefore, whether steel or iron should be taken seriously, to prevent brittle fracture. This article describes how to use electron microscopy to observe fracture, find the cause of fracture, analyze the influencing factors and how to prevent some brittle fracture