Shandong University

Tianrun Industry Technology Co., Ltd.

Shandong Tianrun Zhongcheng Additive Manufacturing Co., Ltd.

Jianchen Cong

Meizhen Feng

Shijie Lv

Shibo Shao

Xuezhong Dai

Jun Sun

Hongri Cong

Yongming Guo

Haiming Yu

Yangfan Zhou

Peixiang Ni

Yuping Hu

The invention provides a method for increasing wear resistance of a surface of a crankshaft, including: dividing a journal of a crankshaft into a journal coating portion and two journal grinding portions located on two sides of the journal coating portion; the surface of the journal grinding portion is higher than that of the journal coating portion, and higher than the surface of the journal of a finished crankshaft, the surface of the rounded corner of the crankshaft is higher than that of the rounded corner of the finished crankshaft, and the size of the journal coating portion is smaller than that of the journal of the finished crankshaft; and spraying a ceramic coating on the surface of the journal coating portion, grinding the surfaces of the journal and the rounded corner until the ceramic coating and the surface of the rounded corner are seamlessly joined, and performing polishing.

Method for increasing wear resistance of surface of crankshaft using ceramic coating

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

Jianchen Cong