目的 研究16MnD锻件在低温下的韧脆性能,探索16MnD在放射性物品运输容器领域的应用范围。方法 采用3个炉批次厚度分别为35 mm和226 mm的16MnD锻件进行一系列低温落锤试验和低温夏比冲击试验,通过试验结果确定16MnD材料的无塑性转变温度、基准无塑性转变温度和韧脆转变曲线,并采用传统的抗脆性断裂论证方法和断裂力学分析方法确认是否满足放射性物品运输容器的抗脆性断裂要求。结果 16MnD锻件的无塑性转变温度和基准无塑性转变温度均在-40 ℃左右,韧脆转变温度FATT50（Fracture appearance transition temperature 50%）的范围为-10~10 ℃。结论 16MnD锻件具有良好的低温性能,具备在放射性物品运输容器领域应用的基础。
Abstract
The work aims to investigate the toughness-brittleness properties of 16MnD forgings at low temperature, and explore the application scope of 16MnD in the field of radioactive material transport casks. A series of low-temperature drop-weight tests and low-temperature Charpy impact tests were conducted on three heats of 16MnD forgings with thicknesses of 35 mm and 226 mm. Based on the test results, the nil-ductility transition temperature, reference nil-ductility transition temperature, and toughness-brittleness transition curve of the 16MnD material were determined. Both conventional anti-brittle fracture assessment methods and fracture mechanics analysis were applied to confirm compliance with the brittle fracture resistance requirements for radioactive material transport casks. The results indicated that the nil-ductility transition temperature and reference nil-ductility transition temperature of the 16MnD forgings were both around -40 °C, while the toughness-brittleness transition temperature (FATT50) ranges from -10 °C to 10 °C. The 16MnD forgings exhibit excellent low-temperature performance, providing a foundation for their application in the field of radioactive material transport casks.
关键词
16MnD /
低温韧性 /
放射性物品运输容器
Key words
16MnD /
low-temperature toughness /
radioactive material transport casks
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