The laws of formation of austenite grains in steel 55 under heating from the ferrite-pearlite range to the austenite range are studied. The sizes of the former austenite grins are determined after every stage of the heat treatment. The size distribution histograms are plotted. The processes responsible for grain refinement are studied under heating in two temperature ranges, i.e., 720 – 760°C and 1060 – 1100°C.

中文翻译：

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钢中奥氏体晶粒形成的特殊特征 55

研究了钢55在从铁素体-珠光体区加热到奥氏体区时奥氏体晶粒的形成规律。在热处理的每个阶段后确定前奥氏体磨削的尺寸。绘制尺寸分布直方图。在两个温度范围内，即 720 – 760°C 和 1060 – 1100°C 的加热条件下研究了导致晶粒细化的过程。