Smelting method for cylinder cover of marine diesel engine
A technology for marine diesel engine and cylinder head, which is applied in the field of smelting of marine diesel engine cylinder head, can solve the problems of substandard performance and low quality of the cylinder head, and achieve the effect of ensuring the breeding effect, improving the quality and reducing the content of rare earth.
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Embodiment 1
[0022] A method for smelting a cylinder head of a marine diesel engine comprises the following steps: batching→smelting raw molten iron→spheroidizing treatment→primary inoculation treatment→secondary inoculation treatment→pouring.
[0023] The steps of smelting the original molten iron include: using Q10 newborn iron and carbon steel scrap as raw materials, melting the newborn iron and carbon steel scrap at a ratio of 7:3, and superheating for 5 to 10 minutes when the melting temperature reaches 1530°C to clean the molten iron. When the chemical composition of the previous assay meets the process requirements, Mn: 0.22% is controlled, and the molten iron is tapped.
[0024] The spheroidizing treatment steps include: using the flushing method, adding 1.3% ferrite-type nodularizer to the pit of the nodularization tundish, compacting, and then using 0.2% fine ferrosilicon powder to cover the ferrite-type nodulizer Then press two small pieces of newborn iron on the upper part to d...
Embodiment 2
[0030] A method for smelting a cylinder head of a marine diesel engine comprises the following steps: batching→smelting raw molten iron→spheroidizing treatment→primary inoculation treatment→secondary inoculation treatment→pouring.
[0031] The steps of smelting the original molten iron include: using Q10 newborn iron and carbon steel scrap as raw materials, melting the newborn iron and carbon steel scrap at a ratio of 7:3, and superheating for 5 to 10 minutes when the melting temperature reaches 1530°C to clean the molten iron. When the chemical composition of the previous assay meets the process requirements, Mn: 0.26% is controlled, and the molten iron is tapped.
[0032] The spheroidizing treatment steps include: using the flushing method, adding 1.8% ferrite nodulizer into the pit of the spheroidizing tundish, compacting, and then covering the ferrite nodulizer with 0.2% fine ferrosilicon powder Then press two small pieces of newborn iron on the upper part to discharge 50%...
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