０概述隔板套是汽轮机上的重要零件之一，在高温、高压下工作，要求具有较高质量。在生产２０万千瓦汽轮机改造机组低压隔板套时，由于其结构、铁液化学成分及实际生产条件等因素，经常因产生缩松缺陷而必须焊补或报废。因此我们对该件铸造工艺进行了分析、改进、提高了合格率 0 Overview Baffle covers are one of the most important parts on steam turbines and require high quality at high temperatures and pressures. In the production of 200,000-kilowatt turbine retrofit unit low-pressure diaphragm sleeve, due to its structure, the chemical composition of molten iron and the actual production conditions and other factors, often due to shrinkage defects and must be welding repair or scrapped. Therefore, we have analyzed the casting process, improve, improve the pass rate