通过实验室调质工艺研究，确定了核安全壳用钢SA738Gr．B热处理工艺，经工业化热处理后，45mm厚度SA738Gr．B钢具有良好的拉伸性能和优异的低温冲击韧性，同时具有稳定的高温拉伸性能，其显微组织为均匀细小的板条贝氏体，在板条内和界面处有大量弥散的纳米级碳化物析出。
SA738Gr. B steel plate for nuclear power station purposes was quenched and tempered with the heat treatment technology obtained by lab-experiments. Industrial processing was implemented on 45 mm thick plates which displayed well tensile properties and Charpy V-notch impact energy. The plate also demonstrated well me- chanical properties at 200 ~C. Well uniformity of fine lath-banite characterized the microstructure of the plate with nano-sized carbides dispersing inner the banite structure and its boundaries.
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