一、序言金属材料的显微组织,一方面和机械性能有着密切关系,另一方面基本上反映着已承受过的热的和机械的处理情况。因此,如果预先已知显微组织与机械性能或热的、机械的处理关系,就可以通过观察显微组织,推测材料的机械性能和所承受过的热的、机 I. Preface The microstructure of metallic materials is closely related, on the one hand, to mechanical properties and, on the other hand, basically reflects the thermal and mechanical processes that have been taken. Therefore, if the relationship between the microstructure and the mechanical property or the thermal and mechanical treatment is known in advance, it is possible to estimate the mechanical properties of the material and the heat suffered by observing the microstructure