A new method for improving ferritic-pearlitic steel brittle fracture resistance is considered. The favorable effect of thermal improvement and subsequent programmed strengthening hardening during additional medium-temperature tempering is demonstrated on the example of steel 09G2S. The new technology makes it possible to lower the steel 09G2S critical brittleness temperature T c0 determined in terms of the criterion of fracture energy intensity by 20°C, and to increase steel impact strength at –90°C by about a factor of three with retention of the specified strength properties.

中文翻译：

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在回火过程中使用程序硬化以提高钢的抗脆裂性

研究了一种提高铁素体-珠光体钢抗脆性断裂性能的新方法。以钢 09G2S 为例，证明了在附加中温回火过程中热改进和随后的程序强化硬化的有利效果。新技术可以将根据断裂能量强度标准确定的 09G2S 钢临界脆性温度 Tc0 降低 20°C，并使钢在 –90°C 下的冲击强度提高约 3 倍，同时保留指定的强度属性。