大型船用柴油机球墨铸铁机身铸造工艺优化设计

分析了大型船用柴油机球墨铸铁机身铸造难点及可能出现的铸造缺陷,提出了铸造工艺优化设计的主要内容及方法,确定了浇注位置及造型方法,选择了铸造工艺参数,并进行了浇冒口系统设计计算及数值模拟优化,优化了球化孕育处理工艺等。结果表明,按照提出的设计思路和方法,稳定生产了符合图纸和技术文件要求的铸件,为同类铸件铸造工艺标准化、规范化设计积累了经验。

Optimization Design of Casting Process of Ductile Iron Cylinder Block of Large Marine Diesel Engine

The casting difficulties and possible defects of nodular cast iron fuselage of large Marine diesel engine were analyzed.The main contents and methods of optimal casting process design were presented.The casting position and molding method were determined,casting process parameters were selected,and the sprue riser system design and numerical simulation were optimized.The spheroidization inoculation process was optimized.The results show that the castings conforming to the requirements of drawings and technical documents have been produced stably according to the proposed design ideas and methods,and the experience has been accumulated for the standardization and design of similar casting process.