“铁碳合金”是《金属材料与热处理》教材中的重要内容,铁碳合金相图是研究铁碳合金的工具,是研究碳钢和铸铁成分、温度、组织和性能之间关系的理论基础,也是制定各种热加工工艺的依据。文章在了解铁碳合金相图特性线的基础上,分析了“铁碳合金相图”的应用,为新材料的研制提供了理论基础。 “Iron-carbon alloy” is an important content in the textbook of “Metal Materials and Heat Treatment”. The iron-carbon alloy phase diagram is a tool for studying iron-carbon alloys and is used to study the relationship between the composition of carbon steel and cast iron, temperature, microstructure and properties Theoretical basis, but also to develop a variety of thermal processing technology basis. On the basis of understanding the characteristic curves of iron-carbon alloy, the article analyzes the application of “iron-carbon alloy phase diagram”, which provides a theoretical basis for the development of new materials.