大型低碳不锈钢水轮机下环铸件的生产实践.pdfVIP

学兔兔 Mar．2012 · 324· VOI．61 NO．3 t ’ ● ■^●、● ●‘■～● ●^● {经验交流 } _^，■ 、 ¨■～‘”● n●v’^一 大型低碳不锈钢水轮机下环铸件的生产实践 吴现龙，邵抗振，李 桐，李克锐 (郑州机械研究所，河南郑州450001) 摘要：分析了大型低碳不锈钢水轮机下环件的结构特点及生产难点。生产中采用水玻璃砂造型，感应炉熔炼和复合精 炼措施，设计合理的浇注系统并设置保温冒口，利用计算机模拟铸件凝固过程，预测缺陷部位，并设计了合理的热处 理工艺。经生产验证，铸件的化学成分及力学性能完全满足要求，铸件质量合格，并降低了生产成本，为生产高质量 的大型低碳不锈钢铸件提供了宝贵的经验。 关键词：水轮机；下环；浇注系统；感应炉熔炼；复合精炼；热处理 中图分类号：TG269 文献标识码：B 文章编号：1001—4977(2012)03—0324—03 Production Practice of Large Low Carbon Stainless Steel Water Turbine Band Casting WU Xian—long，SHAO Kang—zhen，LI Tong，LI Ke—rui (ZhengzhOU Research Institute ofMechanical Engineering，ZhengzhOU 450001，Henan，China) Abstract：The structure characteristic and technique di伍culty of large low carbon stainless steel water turbine band were analyzed．To produce the band，silicate bonded sand was molded，induction furnace smelting and compound refinement were adopted，suitable gating system and insulated feeder were designed， by using simulating solidification process of band to predict defects，and the suitable heat treatment process was designed in production．The production practice shows that the chemical composition，mechanical properties meet requirements；product quality iS qualified and the cost decreased；and valuable experiences were provided for the production of hi quality 1arge low carbon stainless steel casting． Key words：water turbine；band；gating system；induction fumace smelting；compound refine；heat treatment 我国的水电资源丰富，水电年发电量居世界首 中经受水流和泥沙的冲刷，因此，对铸件材质的力学 位。随着我国三峡电