1.  Technical measures to solve metal wear or surface scratches by traditional processes

1.1 Repair welding + processing: This repair method is one of the most traditional methods for solving metal wear and scratches. Such repair processes have unavoidable repair defects.

a. The welding process has a thermal stress effect on the metal, which is easy to damage the device twice;

b. Due to welding accuracy problems, the repaired parts after welding are more difficult to operate during machining or fitter restoration;

c. The repaired parts are very easy to deform, which affects the operation accuracy of the equipment.

1.2 Brush plating repair: This technique can be used to repair minor defects such as local scratches or surface wear, and the biggest disadvantage of the brush plating repair process is that

a. The entire surface is brush-plated, it is not easy to operate on the local scratches or defects in the middle part, and there is a problem of delamination or poor combination with the original metal material after the repair;

b. The repair process can only target metal wear with a wear depth of less than 0.3mm, and the repairable range is greatly limited.

2. Carbon nano-coating technical measures to solve various types of metal wear or surface scratches. The application process of carbon nano-polymer materials is very simple and convenient. After analyzing the operating environment parameters, the repair of wear or scratches is carried out according to a certain construction process. The common repair processes are as follows:

2.1 Machining and repairing process: this process is to use carbon nano-polymer materials to first recover the worn or scratched parts, and use the machining method to perform dimensional processing on the repaired material to ensure the shape and position tolerance requirements of shaft parts or other parts;

2.2 Repairing process of the corresponding relationship between components: the online repairing technology of the worn parts is completed by utilizing the mutual cooperation relationship of the original components during the operation of the equipment. This repair process can ensure the effective matching surface of the two parts to the greatest extent, far exceeding the contact surface between the original metal and the metal;

2.3 Tooling tool repair process: according to the original design drawing size of the parts or the actual size measured on the spot, the corresponding repair tooling is made, combined with the application characteristics of carbon nano repair materials to complete the repair of the worn parts, which can well guarantee the shape of the shaft parts Position tolerance requirements.

Carbon nano-polymer repair technology is similar to a cold welding technology, which has the advantages of excellent compression resistance, corrosion resistance and thermal alternating resistance, as well as high chemical stability and good physical and mechanical properties, which can be firmly It sticks to the metal surface without falling off easily. No high temperature will be generated during the online repair process, which protects the device body from damage and is not limited by the amount of wear during the repair process.