Shandong University

Tianrun Industry Technology Co., Ltd.

Shijie Lv

Jianchen Cong

Meizhen Feng

Hongri Cong

Xuezhong Dai

Shibo Shao

Haiming Yu

Yuping Hu

Peixiang Ni

The present disclosure provides a method for controlling an amount of silicon added to ductile cast iron, a method for casting ductile cast iron, and a cast product, which relate to the technical fields of metallurgical and cast iron alloys. The method for controlling an amount of silicon added to ductile cast iron includes smelting ductile cast iron using scrap steel as a raw material. After the scrap steel is melted into molten iron, a copper alloy is added so that the molten iron has a copper equivalent of 0.8% to 1.0%, wherein the copper equivalent is controlled by formula (II). Then, ferrosilicon is added so that the content of silicon added to the molten iron satisfies formula (I).

Method for controlling amount of silicon added to ductile cast iron, method for casting ductile cast iron, and cast product

The invention provides a design method for a connecting rod. The connecting rod includes a first end, a shank and a second end; and the shank is connected between the first end and the second end. The design method includes: determining a weight mof a standard steel connecting rod; determining a weight mof a nodular cast iron connecting rod having the same size with the standard steel connecting rod; and simulating to reinforce the shank with a reinforcement material having a preset weight m, and calculating a size of the reinforced shank; where m&#x3e;m, and m&#x3c;m&#x2212;m. The present invention overcomes the technical problem that existing steel connecting rods have larger weights.

Method for connecting rod

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Shandong, China

Shijie Lv