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在稳定和亚稳定的奥氏体——碳共晶系中显微组织变化与结晶曲线的温度变化有关。本文讨论用计算机解决这个问题。用计算机绘出由熔化样品采集的结晶曲线,并计算出以下数据:熔体浇选温度tm、液相线温度t_l、碳当量CEL％、饱和系数Sc、共晶凝固开始温度te、共晶回升温度tr、共晶凝固终了温度t_3。计算了凝固过程中热能变化,并绘出奥氏体和共晶体的相对体积百分数。最后研究了计算机处理数据的组织实验结果,以及在铸铁厂组织控制的实例。
The microstructure changes in the stable and metastable austenite-carbon eutectic system are related to the temperature changes in the crystallization curve. This article discusses the use of computers to solve this problem. The crystallization curve collected from the melted sample was plotted by computer, and the following data were calculated: melt pouring temperature tm, liquidus temperature t_l, carbon equivalent CEL%, saturation coefficient Sc, eutectic solidification start te, eutectic recovery Temperature tr, eutectic solidification temperature t_3. The thermal energy changes during solidification were calculated and the relative volume percentages of austenite and eutectic were plotted. Finally, the experimental results of computer processing data organization, as well as examples of organization control in the iron foundry.