材质为 B12 N- S的 330 MW汽轮机高、中压转子锻件采用法国阿尔斯通公司标准制造 ,在同等强度的情况下 ,与西屋标准和 JB/ T 93标准相比冲击韧性要求极为苛刻。为了保证冲击韧性达到技术条件 ,对影响冲击韧性的各种因素进行了分析 ,指出 P对恶化冲击韧性具有相当大的影响 ,同时也进行了热处理工艺的模拟试验 ,得出改善冲击韧性的最佳淬火温度为 92 0℃～ 94 0℃ ,经返修试制效果显著 ,达到了阿尔斯通标准的要求 The 330 MW steam turbine high and medium pressure rotor forgings, made of B12 N-S, are manufactured using the French Alstom standard and have the highest impact toughness requirements compared to Westinghouse and JB / T 93 at equivalent strength. In order to ensure the impact toughness to meet the technical conditions, impact toughness of the various factors were analyzed, pointed out that P has a considerable impact on deteriorating impact toughness, but also conducted a simulation of heat treatment process, obtained the best impact toughness improvement Quenching temperature of 92 0 ℃ ~ 94 0 ℃, after rework test results significantly, Alstom standards have been reached