摘要
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 。
The B12N-S steel forgings used for 330MW steam turbine high pressure and medium pressure rotors are produced by French Alsthom Company standard.In the case of same strength,as compared with Westinghouse standard and JB/T 93 standard,the impact toughness requirement of Alsthom standard is more strict.For assuring its impact toughness to meet the technical condition,the several influence factors for impact toughness have been analysed,the result shows that P has a big influence on worsened impact toughness.At the same time,the simulation test for heat treatment process has also made,the result shows that the optimum quenching temperature range is 920℃ up to 940℃.The roter forgings have been trial-produced and have met the Alsthom sdandard requirement.
出处
《大型铸锻件》
1999年第4期1-5,共5页
Heavy Casting and Forging
